/* *程序的版权和版本号声明部分： *Copyright(c)2014。烟台大学计算机学院学生 *All rights reserved. *文件名: *作者：赵加响 *完毕日期：2014 年 4月22 日 *版本号号：v1.0 *对任务及求解方法的描写叙述部分： *输入描写叙述：无 *问题描写叙述： *程序输出： *问题分析： *算法设计： */ #include <iostream> using namespace std; class CTime { private: unsigned short int hour; // 时 unsigned short int minute; // 分 unsigned short int second; // 秒 public: CTime(int h=0,int m=0,int s=0); void setTime(int h,int m,int s); void display(); //二目的比較运算符重载 bool operator > (CTime &t); bool operator < (CTime &t); bool operator >= (CTime &t); bool operator <= (CTime &t); bool operator == (CTime &t); bool operator != (CTime &t); //二目的加减运算符的重载 //返回t规定的时、分、秒后的时间，例t1(8,20,25),t2(11,20,50)，t1+t2为:41:15 CTime operator+(CTime &t); CTime operator-(CTime &t);//对比+理解 CTime operator+(int s);//返回s秒后的时间 CTime operator-(int s);//返回s秒前的时间 //二目赋值运算符的重载 CTime operator+=(CTime &c); CTime operator-=(CTime &c); CTime operator+=(int s);//返回s秒后的时间 CTime operator-=(int s);//返回s秒前的时间 //一目运算符的重载 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&,CTime&); }; //以下实现全部的运算符重载代码。 CTime::CTime(int h,int m,int s) { hour=h; minute=m; second=s; } void CTime::setTime(int h,int m,int s) { hour=h; minute=m; second=s; } ostream&operator<<(ostream&output,CTime&t) { output<<t.hour<<":"<<t.minute<<":"<<t.second<<endl; return output; } CTime CTime::operator++(int) { CTime t=*this; second++; if(second>59) { second-=60; minute++; } if(minute>59) { minute-=60; hour++; } if(hour>=24) { hour-=24; } return t; } CTime CTime::operator++() { ++second; if(second>59) { second-=60; minute++; } if(minute>59) { minute-=60; hour++; } if(hour>=24) { hour-=24; } return *this; } CTime CTime::operator--(int) { CTime t=*this; second--; if(second<0) { second+=60; minute--; } if(minute<0) { minute+=60; hour--; } if(hour<0) { hour+=24; } return t; } CTime CTime::operator--() { CTime t=*this; --second; if(second<0) { second+=60; minute--; } if(minute<0) { minute+=60; hour--; } if(hour<0) { hour+=24; } return *this; } bool CTime::operator > (CTime &t) { if(hour>t.hour) return true; else return false; if(hour==t.hour&&minute>t.minute) return true; else return false; if(hour==t.hour&&minute==t.minute&&second>t.second) return true; else return false; } bool CTime::operator < (CTime &t) { if(hour<t.hour) return true; else return false; if(hour==t.hour&&minute<t.minute) return true; else return false; if(hour==t.hour&&minute==t.minute&&second<t.second) return true; else return false; } bool CTime::operator >= (CTime &t) { if(*this<t)return false; return true; } bool CTime::operator <= (CTime &t) { if(*this>t)return false; return true; } bool CTime::operator == (CTime &t) { if(*this>t||*this<t)return false; return true; } bool CTime::operator != (CTime &t) { if(*this==t)return false; return true; } CTime CTime::operator+(CTime &t) { int h,m,s; h=hour+t.hour; m=minute+t.minute; s=second+t.second; if(s>59) { s-=60; m++; } if(m>59) { m-=60; h++; } if(h>24) { h-=24; } CTime t0(h,m,s); return t0; } CTime CTime::operator+(int s) { int ss=s%60; int mm=(s/60)%60; int hh=s/3600; CTime t0(hh,mm,ss); return *this+t0; } CTime CTime::operator-(CTime &t) { int h,m,s; h=hour-t.hour; m=minute-t.minute; s=second-t.second; if(s<0) { s+=60; m--; } if(m<0) { m+=60; h--; } if(h<0) { h+=24; } CTime t0(h,m,s); return t0; } CTime CTime::operator-(int s) { int ss=s%60; int mm=(s/60)%60; int hh=s/3600; CTime t0(hh,mm,ss); return *this-t0; } CTime CTime::operator+=(CTime &c) { *this=*this+c; return *this; } CTime CTime::operator+=(int s) { *this=*this+s; return *this; } CTime CTime::operator-=(CTime &c) { *this=*this-c; return *this; } CTime CTime::operator-=(int s) { *this=*this-s; return *this; } //自行编制用于測试的main()函数。有些结果不必依赖display()函数，提倡用单步运行查看结果 int main() { CTime t1(8,8,8),t2,t3,t4,t5,t6,t7,t8; int a,b,c,s1,s2; char m1,m2; cout<<"t1:"; cout<<t1<<endl; cout<<"输入时间 t2："<<endl; while(1) { cin>>a>>m1>>b>>m2>>c; if(a>24||a<0||b>60||b<0||c>60||c<0) cout<<"输入时间不正确！又一次输入："<<endl; else if(m1!=':'||m2!=':') cout<<"时间格式不正确！
又一次输入："<<endl; else break; } t2.setTime(a,b,c); cout<<"t2: "; cout<<t2<<endl; if (t1>t2) cout<<"t1>t2"<<endl; if (t1<t2) cout<<"t1<t2"<<endl; if (t1==t2) cout<<"t1＝t2"<<endl; if (t1!=t2) cout<<"t1≠t2"<<endl; //“≠”是怎么打出来的？？ if (t1>=t2) cout<<"t1≥t2"<<endl; if (t1<=t2) cout<<"t1≤t2"<<endl; cout<<endl; t3=t1+t2; cout<<"t1+t2: "; cout<<t3<<endl; t4=t1-t2; cout<<"t1-t2: "; cout<<t4<<endl; cout<<"输入要t2添加的秒数："<<endl; cin>>s1; t5=t2+s1; cout<<"t2添加"<<s1<<"秒: "; cout<<t5<<endl; cout<<"输入要t1降低的秒数："<<endl; cin>>s2; t6=t2-s2; cout<<"t1降低"<<s2<<"秒: "; cout<<t6<<endl; cout<<"t1自增一秒后的结果："; t7=++t1; cout<<t7<<endl; cout<<"t2自减一秒后的结果："; t8=--t2; cout<<t8<<endl; }
感悟：输入还没有弄懂，老是出错，就没有再写。一定要掌握它。