问题描述
1.运算符重载，先重载加后重载减，减的操作不正确
减去后的正常时间应该0小时52分钟38秒但是结果是1小时-7分钟-22秒错误在哪里？应该如何改进？错误的原因是？
请输入代码#include<iostream>using namespace std;class Time{private: int hour,minute,second;public: Time(int x,int y,int z) {hour=x;minute=y;second=z;} Time operator+(Time c1) {if(second+c1.second>59){minute++;second-=60;}if(minute+c1.minute>59){hour++;minute-=60;}return Time(hour+c1.hour,minute+c1.minute,second+c1.second); } Time operator-(Time c1) {if(second-c1.second<0){minute--;second+=60;}if(minute-c1.minute<0){hour--;minute+=60;}return Time(hour-c1.hour,minute-c1.minute,second-c1.second); } void out() {cout<<hour<<' hour '<<minute<<' minute '<<second<<' second'<<endl; }};int main(){ Time a(9,27,30),b(8,34,52); (a+b).out(); (a-b).out(); return 0;}
问题解答
回答1：加减重载改成下面这样
Time operator+(Time c1){ int t_hour = hour; int t_minute = minute; int t_second = second; if(second+c1.second>59) {t_minute++;t_second-=60;} if(minute+c1.minute>59) {t_hour++;t_minute-=60;} return Time(t_hour+c1.hour,t_minute+c1.minute,t_second+c1.second);}Time operator-(Time c1){ int t_hour = hour; int t_minute = minute; int t_second = second; if(second-c1.second<0) {t_minute--;t_second+=60;} if(minute-c1.minute<0) {t_hour--;t_minute+=60;} return Time(t_hour-c1.hour,t_minute-c1.minute,t_second-c1.second);}
