P173-3-2 下面的程序实现复数的加法

#include <iostream>
using namespace std;
class myComplex
{
public:
	int real, imag;
	myComplex(int  r = 0, int i = 0)
	{
		real = r;
		imag = i;
	}
};
myComplex operator+(__________, myComplex& b)//答案：myComplex& a
{
	int r = a.real + b.real;
	int i = a.imag + b.imag;
	return _____________;// 答案：myComplex(r,i)
}
int main()
{
	myComplex x(1, 2), y(3, 4), z;
	z = x + y;//隐式转换
	cout << z.real << "+" << z.imag << "i" << endl;
	return 0;
}