编写一个程序 声明复数的类complex 使用友元函数add实现复数加法（complex怎么运算）

#include<iostream>

using namespace std;

class complex{

int r,v;

public:

complex(int real=0,int virt=0):r(real),v(virt){}

void show(){

cout<<r<<"+"<<v<<"i"<<endl;

}

friend complex add(complex a,complex b)

{

complex p=complex(a.r+b.r,a.v+b.v);

return p;

}

};

int main(){

complex a(23,2),b(33,4),*p;

p= new complex;

*p=add(a,b);

p->show();

return 0;

}