爱华网#include<iostream>
#include<vector>
using namespace std;
class test{
public:
int v;
test():v(0){}
test(const int &a):v(a){}
test(const test &t1):v(t1.v){}
//比较两个对象的大小
bool operator<(const test &t1)const{
return (v < t1.v);
}
//比较对象和int的大小
bool operator<(const int &t1)const{
return (v < t1);
}
//友元函数，比较int和对象的大小
friend inline bool operator<(const int&a, const test & t1){
return (a < t1.v);
}
//对象间赋值
test & operator=(const test&t1){
v = t1.v;
return *this;
}
//int赋值给对象
test & operator=(const int&t1){
v = t1;
return *this;
}
//对象加上 int
test operator+(const int & a){
test t1;
t1.v = v + a;
return t1;
}
//对象加对象
test operator+(test &t1){
test t2;
t2.v = v + t1.v;
return t2;
}
//对象加上对象
test &operator+=(const test&t1){
v += t1.v;
return *this;
}
//对象加上int
test &operator+=(const int&a){
v += a;
return *this;
}
//对象==对象
bool operator==(const test &t1)const{
return (v == t1.v);
}
//对象==int
bool operator==(const int &t1)const{
return (v == t1);
}
friend inline ostream & operator<< (ostream & os,test &t1){
cout << "class t("<< t1.v<< ")"<< endl;
return os;
}
friend inline istream & operator>> (istream & is,test &t1){
cin >> t1.v;
return is;
}
};
int main(){
test t0, t1(3);
test t2(t1);
cout << t0<< t1<< t2;
cin >> t1;
t2 = t1;
t2 += t1;
t1 += 10;
cout << t2;
if(t1 < t2) cout <<"t1 < t2";
else if(t1 == t2) cout << "t1 =t2";
else cout << "t1 >t2";
cout <<endl;
system("pause");
return 0;
}
