实例：闹钟程序

╰半夏微凉° 2022-08-24 00:48 9阅读 0赞

//头文件

#ifndef ALARM_H
    #define ALARM_H
    using namespace std;
    class Alarm
    {
    public: 
    int menu_select();//菜单选择 
    void dispaly_time();//显示时间 
    bool set_time();//设定预报的时间 
    bool is_non_time(int aHour, int aMin);//判断时间合法性 
    bool tell_time(int aHour, int aMin);//按照时间报时
    private: 
    int m_iHour; 
    int m_iMin;
    };
    #endif

源文件

// alarm.cpp : 定义控制台应用程序的入口点。

#include "stdafx.h"
    #include <iostream>
    #include <ctime>
    #include <windows.h>
    #pragma comment(lib, "winmm.lib")
    #include "alarm.h"
    int Alarm::menu_select()
    { 
    cout << "  迷你小闹钟     "<<endl <<"1.显示当前时间"<<endl<<"2.设定时间"<<endl<<"0.退出"<<endl; 
    cout <<"请选择(0-2)"<<endl; 
    int choice; 
    for (;;) 
    {  
    cin >> choice;  
    if (choice<0||choice>2)  
    {
    cout << "输入的选择错误！！请重新输入0-2！";  
    }  
    else   
    switch (choice)   
    {   
    case 1:    
    dispaly_time();    
    break;   
    case 2:    
    set_time();        
    break;   
    case 0:       
    exit(0);   
    default :    
    break;       
    }    
    } 
    return choice;
    }
    void Alarm::dispaly_time()
    { 
    time_t rawtime;//获取时间种子 
    struct tm * timeinfo;
    time ( &rawtime ); 
    timeinfo = localtime ( &rawtime );//当地时间 
    cout <<  "现在北京时间为： "<<timeinfo->tm_year +1900<<"年"<< 
    timeinfo->tm_mon+1<<"月"<<timeinfo->tm_mday<<"日/t" << 
    timeinfo->tm_hour<<":"<<timeinfo->tm_min<<":"<<
    timeinfo->tm_sec<<endl;  
    }
    bool Alarm::is_non_time(int aHour, int aMin)
    { 
    if (aHour<24&&aHour>=0) 
    {  
    if (aMin>=0&&aMin<60)  
    {   
    return true;  
    } 
    } 
    cout << "你输入的时间不合法！！"<<endl; set_time();
    }
    bool Alarm::set_time()
    { 
    int aHour,aMin,aSec; 
    cout << "请设定要报时的时间(用空格隔开)："; 
    cin >> aHour>>aMin; 
    is_non_time(aHour,aMin);
    m_iHour=aHour; 
    m_iMin=aMin;
    tell_time(m_iHour,m_iMin); 
    return true;
    }
     
    bool Alarm::tell_time(int aHour,int aMin)
    { 
    time_t rawtime;//获取时间种子 
    struct tm * timeinfo;
    time ( &rawtime ); 
    timeinfo = localtime ( &rawtime );//当地时间     
    long long differ;//现在相差多少时间  
    differ=(timeinfo->tm_hour-aHour)*3600+(timeinfo->tm_min)*60; 
    cout <<"Zzz Zzz····"; 
    Sleep(differ);//sleep()毫秒
    cout <<"懒虫快起床！！！" <<endl; 
    PlaySound (TEXT ("C://1.wav"), NULL, SND_FILENAME | SND_ASYNC) ; 
    dispaly_time();
    return true;
    }
     
    int _tmain(int argc, _TCHAR* argv[])
    {
    Alarm clock; 
    clock.menu_select();
    system("pause");
    return 0;
    }

运行结果：

![Center][]

[Center]: /images/20220823/cb6e012cb62b41349673b3bbef180df8.png