/* (程序头部注释开始) * 程序的版权和版本声明部分 * Copyright (c) 2011, 烟台大学计算机学院学生 * All rights reserved. * 文件名称: 窗口四则运算* 作 者: 白传雷 * 完成日期: 2012 年 5 月 30 日 * 版 本 号: v1.0 * 对任务及求解方法的描述部分 * 输入描述: * 问题描述: * 程序头部的注释结束 *///CFraction.hint gcd(int m, int n); class CFraction { private: int nume; // 分子 int deno; // 分母 public://构造函数及运算符重载的函数声明 CFraction(int nu=1,int de=1){nume=nu;deno=de;} void simplify();int get_nume();int get_deno(); CFraction operator+(CFraction &t); CFraction operator-(CFraction &t); CFraction operator*(CFraction &t); CFraction operator/(CFraction &t); };
//CFraction.cpp//运算符重载定义函数#include "stdafx.h" #include "CFraction.h" CFraction CFraction::operator+(CFraction &t)//分数的加法运算 { CFraction a; if(deno==t.deno) { a.deno=deno; a.nume=nume+t.nume; } else { a.deno=deno*t.deno; a.nume=nume*t.deno+deno*t.nume; } return a; } CFraction CFraction::operator-(CFraction &t)//分数的减法运算 { CFraction a; if(deno==t.deno) { a.deno=deno; a.nume=nume-t.nume; } else { a.deno=deno*t.deno; a.nume=nume*t.deno-deno*t.nume; } return a; } CFraction CFraction::operator*(CFraction &t)//分数的乘法运算 { CFraction a; a.deno=deno*t.deno; a.nume=nume*t.nume; return a; } CFraction CFraction::operator/(CFraction &t)//分数的除法运算 { CFraction a; a.deno=deno*t.nume; a.nume=nume*t.deno; return a; } void CFraction::simplify() //化简分数 { int n=gcd(deno, nume); deno/=n; // 化简 nume/=n; } int CFraction::get_deno() { return nume; } int CFraction::get_nume() { return deno; } // 求m,n的最大公约数 int gcd(int m, int n) { int r; if (m<n){r=m;m=n;n=r;} while(r=m%n) // 求m,n的最大公约数 { m=n; n=r; } return n; }
// Mymath.cpp//#include "stdafx.h"#include "Mymath.h"#include "MymathDlg.h"#include "CFraction.h"#ifdef _DEBUG#define new DEBUG_NEW#endif// 用于应用程序“关于”菜单项的 CAboutDlg 对话框class CAboutDlg : public CDialog{public:CAboutDlg();// 对话框数据enum { IDD = IDD_ABOUTBOX };protected:virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV 支持// 实现protected:DECLARE_MESSAGE_MAP()};CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD){}void CAboutDlg::DoDataExchange(CDataExchange* pDX){CDialog::DoDataExchange(pDX);}BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)END_MESSAGE_MAP()// CMymathDlg 对话框CMymathDlg::CMymathDlg(CWnd* pParent /*=NULL*/): CDialog(CMymathDlg::IDD, pParent), t1_n(0), t1_d(0), t2_n(0), t2_d(0), t3_n(0), t3_d(0), C(_T("")){m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);}void CMymathDlg::DoDataExchange(CDataExchange* pDX){CDialog::DoDataExchange(pDX);DDX_Text(pDX, IDC_EDIT1, t1_n);DDX_Text(pDX, IDC_EDIT2, t1_d);DDX_Text(pDX, IDC_EDIT4, t2_n);DDX_Text(pDX, IDC_EDIT5, t2_d);DDX_Text(pDX, IDC_EDIT6, t3_n);DDX_Text(pDX, IDC_EDIT7, t3_d);DDX_Text(pDX, IDC_EDIT3, C);}BEGIN_MESSAGE_MAP(CMymathDlg, CDialog)ON_WM_SYSCOMMAND()ON_WM_PAINT()ON_WM_QUERYDRAGICON()//}}AFX_MSG_MAPON_BN_CLICKED(IDC_BUTTON1, &CMymathDlg::OnBnClickedButton1)END_MESSAGE_MAP()// CMymathDlg 消息处理程序BOOL CMymathDlg::OnInitDialog(){CDialog::OnInitDialog();// 将“关于...”菜单项添加到系统菜单中。// IDM_ABOUTBOX 必须在系统命令范围内。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);}}// 设置此对话框的图标。当应用程序主窗口不是对话框时,框架将自动// 执行此操作SetIcon(m_hIcon, TRUE);// 设置大图标SetIcon(m_hIcon, FALSE);// 设置小图标// TODO: 在此添加额外的初始化代码return TRUE; // 除非将焦点设置到控件,否则返回 TRUE}void CMymathDlg::OnSysCommand(UINT nID, LPARAM lParam){if ((nID & 0xFFF0) == IDM_ABOUTBOX){CAboutDlg dlgAbout;dlgAbout.DoModal();}else{CDialog::OnSysCommand(nID, lParam);}}// 如果向对话框添加最小化按钮,则需要下面的代码// 来绘制该图标。对于使用文档/视图模型的 MFC 应用程序,// 这将由框架自动完成。void CMymathDlg::OnPaint(){if (IsIconic()){CPaintDC dc(this); // 用于绘制的设备上下文SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0);// 使图标在工作区矩形中居中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;// 绘制图标dc.DrawIcon(x, y, m_hIcon);}else{CDialog::OnPaint();}}//当用户拖动最小化窗口时系统调用此函数取得光标//显示。HCURSOR CMymathDlg::OnQueryDragIcon(){return static_cast<HCURSOR>(m_hIcon);}void CMymathDlg::OnBnClickedButton1(){// TODO: 在此添加控件通知处理程序代码UpdateData();//将把界面上各控件输入的值“捕获”到与之关联的变量中 CFraction t1(t1_n,t1_d); CFraction t2(t2_n,t2_d); CFraction t3(t3_n,t3_d); if(C=='+') t3=t1+t2; else if(C=='-') t3=t1-t2; else if(C=='*') t3=t1*t2; else if (C=='/') t3=t1/t2; t3.simplify(); t3_d=t3.get_deno(); t3_n=t3.get_nume(); UpdateData(FALSE); }
运算结果: