第九周项目二

来源：互联网发布：在线真心话大冒险软件编辑：程序博客网时间：2024/05/17 07:22
#include <iostream>using namespace std;class CTime{public:    CTime()    {        minute=0;        sec=0;    }    CTime(int m,int s):minute(m),sec(s) {}    CTime operator++(int);//后置++，下一秒    CTime operator++();//前置++，下一秒，前置与后置返回值不一样    CTime operator--( int);//后置--，前一秒    CTime operator--();//前置--，前一秒    friend ostream & operator<<(ostream&output,CTime&t)    {        output<<t.minute<<":"<<t.sec<<endl;        return output;    }private:    int minute;    int sec;};CTime CTime::operator++(){    if(++sec>=60)    {        sec-=60;        ++minute;        return *this;    }}CTime CTime::operator++(int){    CTime temp(*this);    sec++;    if(sec>=60)    {        sec-=60;        ++minute;    }    return temp;}CTime CTime::operator--(){    if(--sec<0)    {        sec+=60;        --minute;    }    return *this;}CTime CTime::operator--(int){    CTime temp(*this);    sec--;    if(sec<0)    {        sec+=60;        --minute;    }    return temp;}int main(){    CTime time1(34,59),time2;    cout<<"time1:";    cout<<time1;    ++time1;    cout<<"++time1:";    cout<<time1;    time2=time1++;//赋值以及运算    cout<<"time1++:";    cout<<time1;    cout<<"time2:";    cout<<time2;    --time1;    cout<<"--time1:";    cout<<time1;    time2=time1--;    cout<<"time1--:";    cout<<time1;    cout<<"time2:";    cout<<time2;    return 0;}
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