10.1 分别通过函数和重载运算符来实现复数相加

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#include <iostream>using namespace std;class Complex{public:Complex(){real=0;imag=0;}Complex(int r,int i){real=r;imag=i;}Complex complex_add(Complex &c2)//复数相加函数{Complex c;c.real=real+c2.real;c.imag=imag+c2.imag;return c;}void display();private:int real,imag;};void Complex::display(){cout<<'('<<real<<','<<imag<<"i)"<<endl;}int main(){Complex c1(3,4),c2(-5,10),c3;c3=c1.complex_add(c2);cout<<"c1=";c1.display();cout<<"c2=";c2.display();cout<<"c1+c2=";c3.display();return 0;}

#include <iostream>using namespace std;class Complex{public:Complex(){real=0;imag=0;}Complex(int r,int i){real=r;imag=i;}Complex operator+(Complex &c2)//重载运算符的函数，用于复数相加{Complex c;c.real=real+c2.real;c.imag=imag+c2.imag;return c;}void display();private:int real,imag;};void Complex::display(){cout<<'('<<real<<','<<imag<<"i)"<<endl;}int main(){Complex c1(3,4),c2(-5,10),c3;c3=c1+c2;//系统自动调用c1.operator+(c2)来完成c1+c2;cout<<"c1=";c1.display();cout<<"c2=";c2.display();cout<<"c1+c2=";c3.display();return 0;}重载运算符函数的一般格式如下：函数类型 operator运算符名称(参数列表){对运算符重载的处理}

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