C++ 运算符重载

（Operator） 加分  减法  []的重载 

#include <iostream>
using namespace std;class time1
{public:time1(){shi=0;fen=0;miao=0;}time1(int shi, int fen, int miao){this->shi = shi;this->fen = fen;this->miao = miao;}time1 operator+ (time1 &i){time1 ti;ti.shi = this->shi+i.shi;ti.fen = this->fen+i.fen;ti.miao = this->miao+i.miao;if(ti.miao >= 60){ti.miao=ti.miao-60;ti.fen = ti.fen+1;}return ti;}time1 operator- (time1 &i){time1 tp;tp.shi = this->shi-i.shi;tp.fen = this->fen-i.fen;tp.miao = this->miao-i.miao;return tp;}time1 operator+ (int i){time1 tp;tp.shi = this->shi;tp.fen = this->fen;tp.miao = this->miao+i;if(tp.miao >= 60){tp.miao=tp.miao-60;tp.fen = tp.fen+1;}return  tp;}int operator[](int i){int sex = 0;if(i == 0){sex = this->miao;}else if(i == 1){sex = this->fen;}else{sex = this->shi;}return sex;}void show(){cout<<shi<<":"<<fen<<":"<<miao<<endl;}private:int shi;int fen;int miao;};int main()
{time1 t1(1,2,30);time1 t2(2,3,40);time1 t3;time1 t4;                                                            t3 = t1 + t2;t4 = t2 - t1;t3.show();t3 = t1 + 10;t4.show();t3.show();int sec = t1[0];cout<<"t1[0]="<<sec<<endl;sec  = t1[1];cout<<"t1[1]="<<sec<<endl;return 0;
}