過載運算子號
// A code block
#include"iostream"
using namespace std;
class complex{//複數類宣告
private :
double shi,xu;
public :
complex(double s1=0.0,double x1=0.0)
{//複數類定義函式
shi=s1;xu=x1;
}
void Show()
{//輸出函式
cout<<"("<<shi<<","<<xu<<")"<<endl;
};
complex operator +(complex &c1);//先宣告過載

};

complex complex::operator +(complex &c1)
{//operator 過載+號使得類可以直接靠+計算
complex x;
x.shi=shi+c1.shi;
x.xu=xu+c1.xu;
return x;
}

int main() //主函式
{
complex z1(1.5,2.8),z2(-2.3,3.4),z3; //聲明覆數類的物件
z3=z1+z2;//+運算子被過載
cout<<“z3=”;
z3.Show();
return 0;
}