借贷计算器源代码（贷款计算器源码）

本篇文章给大家谈谈借贷计算器源代码，以及贷款计算器源码对应的知识点，希望对各位有所帮助，不要忘了收藏本站喔。

本文目录一览：

• 1、求WINDOWS一样的计算器JAVA源代码一个
• 2、vc计算器代码
• 3、VC计算器的源代码
• 4、c语言贷款计算器的源程序
• 5、C#计算器源代码
• 6、求一个 java 个人贷款还款计算器 的源代码，

求WINDOWS一样的计算器JAVA源代码一个

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

public class Calculator

{

public static void main(String[] args)

{

CalculatorFrame frame=new CalculatorFrame();

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setVisible(true);

}

}

class CalculatorFrame extends JFrame

{

public CalculatorFrame()

{

setTitle("Calculator");

CalculatorPanel panel=new CalculatorPanel();

add(panel);

pack();

}

}

class CalculatorPanel extends Panel

{

public CalculatorPanel()

{

setLayout(new BorderLayout());

result=0;

lastCommand="=";

start=true;

flag=true;

display=new JButton("0");

display.setEnabled(false);

add(display,BorderLayout.NORTH);

ActionListener insert=new InsertAction();

ActionListener command=new CommandAction();

panel=new JPanel();

panel.setLayout(new GridLayout(4,5));

addButton("7",insert);

addButton("8",insert);

addButton("9",insert);

addButton("/",command);

addButton("CE",command);

addButton("4",insert);

addButton("5",insert);

addButton("6",insert);

addButton("*",command);

addButton("Backspace",command);

addButton("1",insert);

addButton("2",insert);

addButton("3",insert);

addButton("-",command);

addButton("sqrt",command);

addButton("0",insert);

addButton(".",insert);

addButton("=",command);

addButton("+",command);

addButton("1/x",command);

add(panel,BorderLayout.CENTER);

}

private void addButton(String label,ActionListener listener)

{

JButton button=new JButton(label);

button.addActionListener(listener);

panel.add(button);

}

private class InsertAction implements ActionListener

{

public void actionPerformed(ActionEvent event)

{

String input=event.getActionCommand();

if(startflag)

{

display.setText("");

start=false;

}

if(flag)

display.setText(display.getText()+input);

}

}

private class CommandAction implements ActionListener

{

public void actionPerformed(ActionEvent event)

{

String command=event.getActionCommand();

if(command.equals("CE"))

{

display.setText("0");

start=true;

flag=true;

command="=";

}

else

if(startflag)

{

if(command.equals("-"))

{

display.setText(command);

start=false;

}

else

if((command.equals("1/x")||command.equals("sqrt"))flag)

calculate(Double.parseDouble(display.getText()),command);

else

if(flag)

lastCommand=command;

}

else

{

if(command.equals("Backspace")flag)

{

String s=display.getText();

char[] s1=s.toCharArray();

if(s.length()=2)

{

String s2=new String(s1,0,s.length()-1);

display.setText(s2);

}

else

{

display.setText("0");

start=true;

}

}

else if(flag)

{

calculate(Double.parseDouble(display.getText()),command);

lastCommand=command;

start=true;

}

}

}

}

public void calculate(double x,String command)

{

if(lastCommand.equals("+")) result+=x;

else if(lastCommand.equals("-")) result-=x;

else if(lastCommand.equals("/"))

{

if(x!=0)

result/=x;

else

{

display.setText("除数不能为0");

start=false;

flag=false;

return;

}

}

else if(lastCommand.equals("*")) result*=x;

else if(command.equals("1/x"))

{

if(x!=0)

result=1/x;

else

{

display.setText("除数不能为0");

start=false;

flag=false;

return;

}

}

else if(command.equals("sqrt"))

{

if(x=0)

result=Math.sqrt(x);

else

{

display.setText("函数输入无效");

start=false;

flag=false;

return;

}

}

else if(lastCommand.equals("=")) result=x;

display.setText(""+result);

}

private JButton display;

private JPanel panel;

private double result;

private String lastCommand;

private boolean start;

private boolean flag;

}

分记得给我啊！这是我自己编的！

vc计算器代码

/*

说明:

采用树形结构处理表达式,按优先级运算结果,一个加,减,乘,除或数值为一个节点

优先级如下:

函数:4

括号:3

乘除:2

加减:1

*/

#include windows.h

#include iostream

#include fstream

#include string

#include cmath

using namespace std;

const char NUM[]={'0','1','2','3','4','5','6','7','8','9','.'};

const char OPERATION[]={'+','-','*','/'};

const double PI=3.14159265358979;

const double EE=2.71828182818281;

class Fun //处理系统数学函数的类

{

public:

Fun(string o,int t,double l=0.0,double r=0.0):op(o),type(t),lvalue(l),rvalue(r){}

static string FUN[];

double calc();

private:

int type; //666 0 1 sin90 2 3! 3 3C2

string op; //函数类型

double lvalue; //函数左边的值

double rvalue; //函数右边的值

static int FunNum;

};

int Fun::FunNum=10;

string Fun::FUN[]={"!","sin","cos","tan","log","ln","C","A","^","-"};

/*

函数说明:

1:log是以10为底的工程对数

2:ln 是以e为底的自然对数

3:C 计算组合数 输入规则 如计算 3取2的组合 输入表达式 3C2

4:A 计算排列数 输入规则 如计算 3取2的排列 输入表达式 3A2

5:! 计算阶乘

6:^ x的y次方 输入 x^y

*/

int factorial(int n) //阶乘函数

{

int i,s=1;

for(i=1;i=n;i++)

s*=i;

return s;

}

int C(int a,int b)

{

return factorial(a)/(factorial(b)*factorial(a-b));

}

int A(int a,int b)

{

return factorial(a)/factorial(b);

}

double Fun::calc() //计算系统函数的值

{

if(type==0)

return lvalue;

else

{

if(op=="!")

return factorial(lvalue);

if(op=="sin")

return sin(rvalue/180*PI);

if(op=="cos")

return cos(rvalue/180*PI);

if(op=="tan")

return tan(rvalue/180*PI);

if(op=="log")

return log10(rvalue);

if(op=="ln")

return log10(rvalue)/log10(EE);

if(op=="C")

return C(lvalue,rvalue);

if(op=="A")

return A(lvalue,rvalue);

if(op=="^")

return pow(lvalue,rvalue);

if(op=="-")

return -rvalue;

else

{

string err="暂时没有函数"+op;

MessageBox(NULL,err.c_str(),"错误",MB_OK);

return 0;

}

}

}

struct Unit //双向链表保存运算单元

{

Unit(int p,char o,string c,double v,int t,Unit * pr=NULL,Unit * n=NULL)

:PRI(p),Operation(o),Code(c),value(v),Type(t),Pre(pr),Next(n){}

int PRI; //优先级

char Operation; //操作符

string Code; //原始代码

double value; //数据

int Type; //类型 操作符0 数据1 函数2

Unit * Pre; //构成双向链表

Unit * Next;

};

class Node //表达式树状结构的节点

{

public:

Node(char o,int p,int e=1,double v=0,Node * ph=NULL,Node * pl=NULL,Node * pr=NULL)

:Operation(o),PRI(p),Expression(e),value(v),Head(ph),Left(pl),Right(pr){}

Node * Head; //节点的根,左树枝,右树枝

Node * Left;

Node * Right;

double GetValue();

char GetOperation() const {return Operation;}

int GetPri() const {return PRI;}

int IsExp() const {return Expression;}

private:

char Operation; //操作符

int PRI; //优先级

int Expression; //记录该节点是否是表达式0 1

double value; //该节点的值

};

double Node::GetValue() //运算该节点的值

{

if(IsExp()) //该节点的值还未算出来

{

double lvalue,rvalue;

lvalue=Left-GetValue();

rvalue=Right-GetValue();

Expression=0;

char op=GetOperation();

switch(op)

{

case '+':

return lvalue+rvalue;

case '-':

return lvalue-rvalue;

case '*':

return lvalue*rvalue;

case '/':

return lvalue/rvalue;

default:

return 0;

}

}

else

return value;

}

bool Isnum(char c)

{

for(int i=0;isizeof(NUM);i++)

{

if(c==NUM[i])

return true;

}

return false;

}

bool Isoperation(char c)

{

for(int i=0;isizeof(OPERATION);i++)

{

if(c==OPERATION[i])

return true;

}

return false;

}

Unit * Analyse(string exp) //分析表达式并生成链表

{

int pri=0; //当前优先级

int stat=1; //当前的读入状态 括号 0 运算符 1 其他 2

Unit * head=NULL,* p=NULL;

int i=0,explen;

explen=exp.size();

for(i=0;iexplen;i++)

{

char c=exp.at(i);

if(c=='(')

{

pri+=3;

stat=0;

}

else if(c==')')

{

pri-=3;

stat=0;

}

else if(Isoperation(c) stat!=1) //操作符后的当正负号处理

{

stat=1;

Unit * temp=p;

int add_pri; //自身增加的优先级

if(c=='+' || c=='-')

add_pri=1;

else

add_pri=2;

p-Next=new Unit(pri+add_pri,c," ",0,0);

p=p-Next;

p-Pre=temp;

}

else //其他的当做函数处理

{

stat=2;

string function="";

while(iexplen (c=exp.at(i),! Isoperation(c)) c!=')')

{

function+=c;

i++;

}

i--;

if(head==NULL)

{

p=new Unit(pri,' ',function,0,2);

head=p;

}

else

{

Unit * temp=p;

p-Next=new Unit(pri,' ',function,0,2);

p=p-Next;

p-Pre=temp;

}

}

}

return head;

}

Unit * Calc(Unit * head) //计算双向链表基本单元的值

{

Unit * p=head;

while(p!=NULL)

{

if(p-Type!=0) //非操作符

{

string temp=p-Code;

string op;

double lvalue=0,rvalue=0;

int l_point=0,r_point=0;

int i=0,type=0;

char ch;

while(itemp.size() (ch=temp.at(i),Isnum(ch)))

{

if(ch=='.')

{

l_point++;

i++;

continue;

}

if(! l_point)

lvalue*=10;

lvalue+=(ch-'0')*pow(10,-l_point);

i++;

if(l_point)

l_point++;

}

while(itemp.size() (ch=temp.at(i),! Isnum(ch)))

{

op+=ch;

type=1;

i++;

}

while(itemp.size() (ch=temp.at(i),Isnum(ch)))

{

if(ch=='.')

{

r_point++;

i++;

continue;

}

if(! r_point)

rvalue*=10;

rvalue+=(ch-'0')*pow(10,-r_point);

i++;

if(r_point)

r_point++;

}

Fun * f=new Fun(op,type,lvalue,rvalue);

p-value=f-calc();

}

p=p-Next;

}

return head;

}

Node * Tree(Unit * head) //生成表达式树

{

Node * root=NULL,* proot=NULL,* pbranch=NULL;

Unit * p=head;

int now_pri; //当前优先级

bool hadop=false;

while(p!=NULL)

{

if(p-Type==0) //如果是一个操作符

{

hadop=true;

if(root==NULL)

{

proot=new Node(p-Operation,p-PRI,1);

root=proot;

pbranch=root;

now_pri=p-PRI;

proot-Left=new Node(' ',0,0,p-Pre-value);

proot-Right=new Node(' ',0,0,p-Next-value);

}

else

{

if(p-PRInow_pri) //优先级低于当前优先级,树根方向

{

proot=new Node(p-Operation,p-PRI,1); //新的树根

proot-Left=root; //根的变换

proot-Left-Head=proot;

proot-Right=new Node(' ',0,0,p-Next-value);

proot-Right-Head=proot;

root=proot;

pbranch=proot; //右树枝的变换

//pbranch-Right=new Node(' ',0,0,p-Pre-value); //树枝右边取值

}

else if(p-PRI==now_pri) //优先级相同,先算左边的

{

Node * temp;

temp=new Node(p-Operation,p-PRI,1);

temp-Left=pbranch;

if(pbranch-Head==NULL)

{

proot=temp;

root=proot;

pbranch-Head=proot;

}

else

{

Node * temp0;

temp0=pbranch-Head;

temp0-Right=temp;

temp-Head=temp0;

pbranch-Head=temp;

}

pbranch=temp;

pbranch-Right=new Node(' ',0,0,p-Next-value);

pbranch-Right-Head=pbranch;

}

else

{

Node * temp;

temp=new Node(p-Operation,p-PRI,1);

pbranch-Right=temp;

temp-Head=pbranch;

pbranch=pbranch-Right;

pbranch-Left=new Node(' ',0,0,p-Pre-value);

pbranch-Left-Head=pbranch;

pbranch-Right=new Node(' ',0,0,p-Next-value);

pbranch-Right-Head=pbranch;

}

now_pri=p-PRI;

}

}

p=p-Next;

}

if(! hadop)

root=new Node(' ',0,0,head-value);

return root;

}

int main()

{

string exp;

ifstream infile("test.txt",ios::in);

while(! getline(infile,exp).eof())

{

if(exp=="")

continue;

Unit * h=Analyse(exp);

h=Calc(h);

Node * root=Tree(h);

coutexp"="root-GetValue()endl;

}

return 0;

}

VC计算器的源代码

// jisuanqiDlg.cpp : implementation file

//

#include "stdafx.h"

#include "jisuanqi.h"

#include "jisuanqiDlg.h"

#include "math.h"

#ifdef _DEBUG

#define new DEBUG_NEW

#undef THIS_FILE

static char THIS_FILE[] = __FILE__;

#endif

/////////////////////////////////////////////////////////////////////////////

// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog

{

public:

CAboutDlg();

// Dialog Data

//{{AFX_DATA(CAboutDlg)

enum { IDD = IDD_ABOUTBOX };

//}}AFX_DATA

// ClassWizard generated virtual function overrides

//{{AFX_VIRTUAL(CAboutDlg)

protected:

virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support

//}}AFX_VIRTUAL

// Implementation

protected:

//{{AFX_MSG(CAboutDlg)

//}}AFX_MSG

DECLARE_MESSAGE_MAP()

};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)

{

//{{AFX_DATA_INIT(CAboutDlg)

//}}AFX_DATA_INIT

}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)

{

CDialog::DoDataExchange(pDX);

//{{AFX_DATA_MAP(CAboutDlg)

//}}AFX_DATA_MAP

}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)

//{{AFX_MSG_MAP(CAboutDlg)

// No message handlers

//}}AFX_MSG_MAP

END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////

// CJisuanqiDlg dialog

CJisuanqiDlg::CJisuanqiDlg(CWnd* pParent )

: CDialog(CJisuanqiDlg::IDD, pParent)

{

//{{AFX_DATA_INIT(CJisuanqiDlg)

m_num = 0.0;

//}}AFX_DATA_INIT

// Note that LoadIcon does not require a subsequent DestroyIcon in Win32

m_hIcon = AfxGetApp()-LoadIcon(IDR_MAINFRAME);

}

void CJisuanqiDlg::DoDataExchange(CDataExchange* pDX)

{

CDialog::DoDataExchange(pDX);

//{{AFX_DATA_MAP(CJisuanqiDlg)

DDX_Text(pDX, IDC_EDIT1, m_num);

//}}AFX_DATA_MAP

}

BEGIN_MESSAGE_MAP(CJisuanqiDlg, CDialog)

//{{AFX_MSG_MAP(CJisuanqiDlg)

ON_WM_SYSCOMMAND()

ON_WM_PAINT()

ON_WM_QUERYDRAGICON()

ON_BN_CLICKED(IDC_BUTTON1, OnButton1)

ON_BN_CLICKED(IDC_BUTTON2, OnButton2)

ON_BN_CLICKED(IDC_BUTTON3, OnButton3)

ON_BN_CLICKED(IDC_BUTTON4, OnButton4)

ON_BN_CLICKED(IDC_BUTTON5, OnButton5)

ON_BN_CLICKED(IDC_BUTTON6, OnButton6)

ON_BN_CLICKED(IDC_BUTTON7, OnButton7)

ON_BN_CLICKED(IDC_BUTTON8, OnButton8)

ON_BN_CLICKED(IDC_BUTTON9, OnButton9)

ON_BN_CLICKED(IDC_BUTTON14, OnButton0)

ON_BN_CLICKED(IDC_BUTTON15, OnButtonPoint)

ON_BN_CLICKED(IDC_BUTTON16, OnButtonEqual)

ON_BN_CLICKED(IDC_BUTTON13, OnButtonChu)

ON_BN_CLICKED(IDC_BUTTON12, OnButtonMul)

ON_BN_CLICKED(IDC_BUTTON11, OnButtonSub)

ON_BN_CLICKED(IDC_BUTTON10, OnButtonAdd)

ON_BN_CLICKED(IDC_BUTTON17, OnButtondelet)

ON_BN_CLICKED(IDC_BUTTON18, OnButtonclear)

ON_BN_CLICKED(IDC_BUTTON19, OnButtonkaifang)

ON_BN_CLICKED(IDC_BUTTON20, OnButtonziranduishu)

ON_BN_CLICKED(IDC_BUTTON21, OnButtonchangyongduishu)

//}}AFX_MSG_MAP

END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////

// CJisuanqiDlg message handlers

BOOL CJisuanqiDlg::OnInitDialog()//初始化变量

{

CDialog::OnInitDialog();

// Add "About..." menu item to system menu.

// IDM_ABOUTBOX must be in the system command range.

ASSERT((IDM_ABOUTBOX 0xFFF0) == IDM_ABOUTBOX);

ASSERT(IDM_ABOUTBOX 0xF000);

CMenu* pSysMenu = GetSystemMenu(FALSE);

if (pSysMenu != NULL)

{

CString strAboutMenu;

strAboutMenu.LoadString(IDS_ABOUTBOX);

if (!strAboutMenu.IsEmpty())

{

pSysMenu-AppendMenu(MF_SEPARATOR);

pSysMenu-AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);

}

}

// Set the icon for this dialog. The framework does this automatically

// when the application's main window is not a dialog

SetIcon(m_hIcon, TRUE); // Set big icon

SetIcon(m_hIcon, FALSE); // Set small icon

// TODO: Add extra initialization here

t=true;

j=true;

i=10;

p=0;

q=0;

m_num=0;

m_lnum=0;

return TRUE; // return TRUE unless you set the focus to a control

}

void CJisuanqiDlg::OnSysCommand(UINT nID, LPARAM lParam)

{

if ((nID 0xFFF0) == IDM_ABOUTBOX)

{

CAboutDlg dlgAbout;

dlgAbout.DoModal();

}

else

{

CDialog::OnSysCommand(nID, lParam);

}

}

// If you add a minimize button to your dialog, you will need the code below

// to draw the icon. For MFC applications using the document/view model,

// this is automatically done for you by the framework.

void CJisuanqiDlg::OnPaint()

{

if (IsIconic())

{

CPaintDC dc(this); // device context for painting

SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

// Center icon in client rectangle

int cxIcon = GetSystemMetrics(SM_CXICON);

int cyIcon = GetSystemMetrics(SM_CYICON);

CRect rect;

GetClientRect(rect);

int x = (rect.Width() - cxIcon + 1) / 2;

int y = (rect.Height() - cyIcon + 1) / 2;

// Draw the icon

dc.DrawIcon(x, y, m_hIcon);

}

else

{

CDialog::OnPaint();

}

}

// The system calls this to obtain the cursor to display while the user drags

// the minimized window.

HCURSOR CJisuanqiDlg::OnQueryDragIcon()

{

return (HCURSOR) m_hIcon;

}

void CJisuanqiDlg::OnButton1()

{

// TODO: Add your control notification handler code here

if(t)

{

m_num=m_num*10+1;

UpdateData(FALSE);

}

else

{

m_num=m_num+1.0/i;

i*=10;

UpdateData(FALSE);

}

}

void CJisuanqiDlg::OnButton2()

{

// TODO: Add your control notification handler code here

if(t)

{

m_num=m_num*10+2;

UpdateData(FALSE);

}

else

{

m_num=m_num+2.0/i;

i*=10;

UpdateData(FALSE);

}

}

void CJisuanqiDlg::OnButton3()

{

// TODO: Add your control notification handler code here

if(t)

{

m_num=m_num*10+3;

UpdateData(FALSE);

}

else

{

m_num=m_num+3.0/i;

i*=10;

UpdateData(FALSE);

}

}

void CJisuanqiDlg::OnButton4()

{

// TODO: Add your control notification handler code here

if(t)

{

m_num=m_num*10+4;

UpdateData(FALSE);

}

else

{

m_num=m_num+4.0/i;

i*=10;

UpdateData(FALSE);

}

}

void CJisuanqiDlg::OnButton5()

{

// TODO: Add your control notification handler code here

if(t)

{

m_num=m_num*10+5;

UpdateData(FALSE);

}

else

{

m_num=m_num+5.0/i;

i*=10;

UpdateData(FALSE);

}

}

void CJisuanqiDlg::OnButton6()

{

// TODO: Add your control notification handler code here

if(t)

{

m_num=m_num*10+6;

UpdateData(FALSE);

}

else

{

m_num=m_num+6.0/i;

i*=10;

UpdateData(FALSE);

}

}

void CJisuanqiDlg::OnButton7()

{

// TODO: Add your control notification handler code here

if(t)

{

m_num=m_num*10+7;

UpdateData(FALSE);

}

else

{

m_num=m_num+7.0/i;

i*=10;

UpdateData(FALSE);

}

}

void CJisuanqiDlg::OnButton8()

{

// TODO: Add your control notification handler code here

if(t)

{

m_num=m_num*10+8;

UpdateData(FALSE);

}

else

{

m_num=m_num+8.0/i;

i*=10;

UpdateData(FALSE);

}

}

void CJisuanqiDlg::OnButton9()

{

// TODO: Add your control notification handler code here

if(t)

{

m_num=m_num*10+9;

UpdateData(FALSE);

}

else

{

m_num=m_num+9.0/i;

i*=10;

UpdateData(FALSE);

}

}

void CJisuanqiDlg::OnButton0()

{

// TODO: Add your control notification handler code here

//UpdateData();

if(t)

{

m_num=m_num*10+0;

UpdateData(FALSE);

}

else

{

m_num=m_num+0.0/i;

i*=10;

UpdateData(FALSE);

}

}

void CJisuanqiDlg::OnButtonPoint()

{

// TODO: Add your control notification handler code here

int i=10;

t=false;

}

void CJisuanqiDlg::OnButtonEqual()

{

// TODO: Add your control notification handler code here

switch(r)

{

case '+':

{

m_num=m_num+m_lnum;

UpdateData(FALSE);

break;

}

case '-':

{

m_num=m_snum-m_num;

UpdateData(FALSE);

break;

}

case '*':

{

m_num=m_mnum*m_num;

UpdateData(FALSE);

break;

}

case '/':

{

if(m_num==0)

{

MessageBox("除数不能是0！");

}

else

{

m_num=m_cnum/m_num;

UpdateData(FALSE);

break;

}

}

}

t=true;

}

void CJisuanqiDlg::OnButtonMul()

{

// TODO: Add your control notification handler code here

r='*';

t=true;

m_mnum=m_num;

m_num=0;

UpdateData(FALSE);

}

void CJisuanqiDlg::OnButtonChu()

{

// TODO: Add your control notification handler code here

r='/';

t=true;

i=10;

m_cnum=m_num;

m_num=0;

UpdateData(FALSE);

}

void CJisuanqiDlg::OnButtonSub()

{

// TODO: Add your control notification handler code here

r='-';

i=10;

t=true;

if(j)

{

m_snum=m_num;

}

else

{

p=0;

adda[p]=m_num;

p++;

for(q=0;q=p;q++)

{

m_lnum=m_lnum+adda[q];

q++;

}

m_num=m_lnum;

UpdateData(FALSE);

m_num=0;

m_snum=m_lnum;

}

m_num=0;

}

void CJisuanqiDlg::OnButtonAdd()

{

// TODO: Add your control notification handler code here

r='+';

t=true;

j=false;

i=10;

p=0;

adda[p]=m_num;

p++;

for(q=0;q=p;q++)

{

m_lnum=m_lnum+adda[q];

q++;

}

m_num=m_lnum;

UpdateData(FALSE);

m_num=0;

}

void CJisuanqiDlg::OnButtondelet()

{

// TODO: Add your control notification handler code here

int p;

p=m_num/10;

m_num=p;

UpdateData(FALSE);

}

void CJisuanqiDlg::OnButtonclear()

{

// TODO: Add your control notification handler code here

t=true;

i=10;

j=true;

m_num=0;

m_lnum=0;

UpdateData(FALSE);

}

void CJisuanqiDlg::OnButtonkaifang()

{

// TODO: Add your control notification handler code here

m_num=sqrt(m_num);

UpdateData(FALSE);

}

void CJisuanqiDlg::OnButtonziranduishu()

{

// TODO: Add your control notification handler code here

m_num=log(m_num);

UpdateData(FALSE);

}

void CJisuanqiDlg::OnButtonchangyongduishu()

{

// TODO: Add your control notification handler code here

m_num=log10(m_num);

UpdateData(FALSE);

}

c语言贷款计算器的源程序

/*

* main.c

*

* Created on: 2011-6-8

* Author: icelights

*/

#include stdio.h

#include stdlib.h

#include ctype.h

#include math.h

#define APR1 0.0747 /*1年（含1年）年利率*/

#define APR2 0.0756 /*1-3年（含3年）年利率*/

#define APR3 0.0774 /*3-5年（含5年）年利率*/

#define APR4 0.0783 /*5年以上年利率*/

#define A_TO_M 1/12 /*月利率 = 年利率 / 12*/

#define RTP 12 /*Reimbursement total periods还款总期数 =年限*12*/

#define LENGTH 80

struct LoanInfo

{

/*姓名*/

char name[LENGTH];

/*贷款总额*/

double LoanAmount;

/*贷款年限*/

double LoanYear;

/*月付*/

double MonthlyPayment;

/*总利息*/

double TotalInterest;

/*还款总额*/

double ReimbursementAmount;

/*年利率*/

double apr;

struct LoanInfo * next;

};

void CalcShow(struct LoanInfo * cur, struct LoanInfo * hd,

struct LoanInfo * prv);

int main(void)

{

int temp;

struct LoanInfo * head = NULL;

struct LoanInfo * prev, * current;

current = (struct LoanInfo *)malloc(sizeof(struct LoanInfo));

if (NULL == head)

{

head = current;

}

else

{

prev-next = current;

}/*End of if (NULL == head)*/

puts("请输入姓名");

gets(current-name);

fflush(stdin);

puts("请输入贷款数额（单位：万元）");

scanf("%lf", ¤t-LoanAmount);

fflush(stdin);

puts("请输入贷款年限");

scanf("%lf", ¤t-LoanYear);

fflush(stdin);

printf("姓名：%s,贷款年限：%lf, 贷款数额%lf",

current-name, current-LoanYear, current-LoanAmount);

prev = current;

puts("请确认Y/N");

temp = getchar();

switch(toupper(temp))

{

case 'Y' : CalcShow(current, head, prev);

break;

case 'N' : free(current);

main();

break;

default : puts("输入错误");

free(current);

break;

}

return 0;

}

void CalcShow(struct LoanInfo * cur, struct LoanInfo * hd,

struct LoanInfo * prv)

{

char lcv_temp;

if (cur-LoanYear = 1)

cur-apr = APR1;

else if (cur-LoanYear = 3)

cur-apr = APR2;

else if (cur-LoanYear = 5)

cur-apr = APR3;

else

cur-apr = APR4;

/*End of if (year = 1)*/

cur-LoanAmount = 10000 * cur-LoanAmount;

cur-ReimbursementAmount = cur-LoanAmount * pow((1 + cur-apr), cur-LoanYear);

cur-MonthlyPayment = cur-ReimbursementAmount / (cur-LoanYear * RTP);

cur-TotalInterest = cur-ReimbursementAmount - cur-LoanAmount;

printf("姓名：%s 贷款年限：%.0lf\n"

"贷款数额：%.2lf 每月还款额：%.2lf\n"

"利息合计：%.2lf 还款总额：%.2lf\n",

cur-name, cur-LoanYear, cur-LoanAmount,

cur-MonthlyPayment, cur-TotalInterest, cur-ReimbursementAmount);

puts("是否继续计算Y/N");

lcv_temp = getchar();

switch(toupper(lcv_temp))

{

case 'Y' : free(cur);

main();

break;

case 'N' : free(cur);

exit(0);

default : puts("输入错误");

free(cur);

main();

break;

}

system("pause");

}

C#计算器源代码

namespace jisuanji

{

public partial class jisuanqi : Form

{

public jisuanqi()

{

InitializeComponent();

}

private void jisuanqi_Load(object sender, EventArgs e)

{

txtMath.Text = "0.0";

}

//存放输入的数字

private string str1 = "";

//存放第二个数字

private string str2 = "";

//存放执行的什么操作 如：+，-，*，/

private string action = "";

//判断是否点击了“=”，默认是没有点击

private bool Equal_flag = false;

private void check(Button btnname)

{

if (action.Equals(""))

{

if (txtMath.Text != "0" || txtMath.Text != "0.0")

{

str1 += btnname.Text;

txtMath.Text = str1.ToString();

}

//如果是第一次输入数字

if (txtMath.Text.Equals("0.0") || txtMath.Text.Equals("0"))

{

txtMath.Text = btnname.Text;

str1 = btnname.Text.ToString();

}

}

//如果已经输入了数字且没有点击“=”

if(!action.Equals("") txtMath.Text.Length != 0 (!txtMath.Text.Equals("0.0")) (!txtMath.Text.Equals("0")))

{

str2 += btnname.Text;

txtMath.Text += btnname.Text;

}

//如果已经输入了数字并执行了加减乘除的操作，第二个数字输入时

else if ((!action.Equals("")) txtMath.Text.Length != 0 !txtMath.Text.Equals(0.0) (!txtMath.Text.Equals("0")))

{

txtMath.Text += btnname.Text;

//str2 = txtMath.Text.ToString();

str2 += btnname.Text;

}

else if (txtMath.Text.Equals("") (!action.Equals("")))

{

txtMath.Text += btnname.Text;

str2 = txtMath.Text;

}

}

private void btnZero_Click(object sender, EventArgs e)

{

if (Equal_flag)

{

//如果没有点击“+-*/”

if (action.Equals(""))

{

if (str1.Equals(""))

{

MessageBox.Show("您的操作有误", "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);

return;

}

}

check(btnZero);

}

else

{

check(btnZero);

Equal_flag = false;

}

}

private void btnDot_Click(object sender, EventArgs e)

{

//点击过等号

if (Equal_flag)

{

//第二个数字没有输入的时候

if (str2.Equals(""))

{

//第一个数字已经有点号存在

if (str1.IndexOf('.') -1)

{

MessageBox.Show("您的操作有误", "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);

txtMath.Text = str1;

return;

}

check(btnDot);

}

//第二个数字输入了的时候

else

{

//第二个数字中不存在点号的时候

if (!(str2.IndexOf('.') -1))

{

check(btnDot);

return;

}

//第二个数字中存在点号的时候

MessageBox.Show("您的操作有误", "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);

}

}

//没有点击过等号

else

{

//第一个数字存在点号

if (str1.IndexOf('.') -1)

{

MessageBox.Show("您的操作有误", "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);

txtMath.Text = str1;

return;

}

//第一个数字不存在点号的时候

else

{

//如果第一个数字还是空的时候

if (!str1.Equals(""))

{

check(btnDot);

//Equal_flag = false;

return;

}

txtMath.Text = "0" + btnDot.Text;

str1 = txtMath.Text;

}

}

}

private void btnOne_Click(object sender, EventArgs e)

{

if (Equal_flag)

{

if (!str1.Equals(""))

{

if (action.Equals(""))

{

MessageBox.Show("请选择运算符", "信息提示");

return;

}

}

check(btnOne);

}

else

{

check(btnOne);

Equal_flag = false;

}

}

private void btnTwo_Click(object sender, EventArgs e)

{

if (Equal_flag)

{

if (!str1.Equals(""))

{

if (action.Equals(""))

{

MessageBox.Show("请选择运算符", "信息提示");

return;

}

}

check(btnTwo);

}

else

{

check(btnTwo);

Equal_flag = false;

}

}

private void btnthree_Click(object sender, EventArgs e)

{

if (Equal_flag)

{

if (!str1.Equals(""))

{

if (action.Equals(""))

{

MessageBox.Show("请选择运算符", "信息提示");

return;

}

}

check(btnthree);

}

else

{

check(btnthree);

Equal_flag = false;

}

}

private void btnFour_Click(object sender, EventArgs e)

{

if (Equal_flag)

{

if (action.Equals(""))

{

MessageBox.Show("请选择运算符", "信息提示");

return;

}

check(btnFour);

}

else

{

check(btnFour);

Equal_flag = false;

}

}

private void btnFive_Click(object sender, EventArgs e)

{

if (Equal_flag)

{

if (!str1.Equals(""))

{

if (action.Equals(""))

{

MessageBox.Show("请选择运算符", "信息提示");

return;

}

}

check(btnFive);

}

else

{

check(btnFive);

Equal_flag = false;

}

}

private void btnSix_Click(object sender, EventArgs e)

{

if (Equal_flag)

{

if (!str1.Equals(""))

{

if (action.Equals(""))

{

MessageBox.Show("请选择运算符", "信息提示");

return;

}

}

check(btnSix);

}

else

{

check(btnSix);

Equal_flag = false;

}

}

private void btnSeven_Click(object sender, EventArgs e)

{

if (Equal_flag)

{

if (!str1.Equals(""))

{

if (action.Equals(""))

{

MessageBox.Show("请选择运算符", "信息提示");

return;

}

}

check(btnSeven);

}

else

{

check(btnSeven);

Equal_flag = false;

}

}

private void btnEight_Click(object sender, EventArgs e)

{

if (Equal_flag)

{

if (!str1.Equals(""))

{

if (action.Equals(""))

{

MessageBox.Show("请选择运算符", "信息提示");

return;

}

}

check(btnEight);

}

else

{

check(btnEight);

Equal_flag = false;

}

}

private void btnNine_Click(object sender, EventArgs e)

{

if (Equal_flag)

{

if (!str1.Equals(""))

{

if (action.Equals(""))

{

MessageBox.Show("请选择运算符", "信息提示");

return;

}

}

check(btnNine);

}

else

{

check(btnNine);

Equal_flag = false;

}

}

private void btnQual_Click(object sender, EventArgs e)

{

str_check(btnQual);

str2 = "";

Equal_flag = true;

action = "";

}

private string calcute(string str1, string str2, string action)

{

switch (action)

{

case "+":

str1 = (double.Parse(str1) + double.Parse(str2)).ToString();

return str1;

case "-":

str1 = (double.Parse(str1) - double.Parse(str2)).ToString();

return str1;

case "*":

str1 = (double.Parse(str1) * double.Parse(str2)).ToString();

return str1;

case "/":

if (str2.Equals("0.0") || str2.Equals("0"))

{

MessageBox.Show("被除数不能为0", "警告");

return str1;

}

str1 = (double.Parse(str1) / double.Parse(str2)).ToString();

return str1;

default :

MessageBox.Show("操作错误！", "提示");

return "wrong";

}

}

private void str_check(Button btnname)

{

//完成上一次计算后点击运算按钮应将结果作为第一个数

if (Equal_flag)

{

//第二个数还没输入的时候

if ((!str1.Equals("")) (str2.Equals("")))

{

if (!(btnname.Text.IndexOf('=') -1))

{

action = btnname.Text;

txtMath.Text += btnname.Text;

}

}

//两个都不为空，第二个数已经输入，应将他们进行运算

if ((!str1.Equals("")) (!str2.Equals("")))

{

str1 = calcute(str1, str2, action);

txtMath.Text = str1.ToString();

}

//直接点击操作错误

else if (str1.Equals(""))

{

MessageBox.Show("请输入要进行运算的数字", "信息提示");

}

}

//没有点击“=”

else if (!Equal_flag)

{

//第二个数还没输入的时候

if ((!str1.Equals("")) (str2.Equals("")))

{

if (!(btnname.Text.IndexOf('=') -1))

{

action = btnname.Text;

txtMath.Text += btnname.Text;

}

}

//两个都不为空，第二个数已经输入，应将他们进行运算

if ((!str1.Equals("")) (!str2.Equals("")))

{

str1 = calcute(str1, str2, action);

txtMath.Text = str1.ToString();

}

//直接点击操作错误

else if (str1.Equals(""))

{

MessageBox.Show("请输入要进行运算的数字", "信息提示");

}

}

}

private void btnPlus_Click(object sender, EventArgs e)

{

str_check(btnPlus);

}

private void btnMinus_Click(object sender, EventArgs e)

{

str_check(btnMinus);

}

private void btnTimes_Click(object sender, EventArgs e)

{

str_check(btnTimes);

}

private void btnDivide_Click(object sender, EventArgs e)

{

str_check(btnDivide);

}

private void btnRest_Click(object sender, EventArgs e)

{

txtMath.Text = "0.0";

str1 = str2 = "";

action = "";

Equal_flag = false;

}

}

}

求一个 java 个人贷款还款计算器 的源代码，

import javax.swing.JOptionPane;

public class Pay {

public static void main(String args[]){

String loanString = JOptionPane.showInputDialog("请输入贷款本金（ loanAmout）:such as 20000.00") ;

double loanAmount= Double.parseDouble(loanString);

String dateString = JOptionPane.showInputDialog("请输入贷款期（loanDate）:between 24-60");

int loanDate = Integer.parseInt(dateString);

String monthRateString = JOptionPane.showInputDialog("请输入月利率 (MonthRate):such as 0.00005");

double monthRate = Double.parseDouble(monthRateString);

double pay_Per_Month = (loanAmount+loanAmount * loanDate * monthRate)/loanDate;

JOptionPane.showMessageDialog(null, pay_Per_Month);

}

}

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