Question

定义复数类complex,并使用友元函数实现复数的加法,减法,乘法,所有函数都返回c

Answer 1

#include

using namespace std;

class complex

{

public:

x05complex(complex &c); //深度复制构造函数

x05complex(float r,float i); //普通构造函数

x05void set(float r,float i); //变量重新赋值

x05complex(); //无参构造函数

x05friend complex add(complex &b,complex &c); //相加

x05friend complex sub(complex &b,complex &c); //相减

friend complex mul(complex &b,complex &c); //相乘

x05void show();

private:

x05float real;

x05float imag;

};

complex::complex()

{

x05x05real = 0;

x05x05imag = 0;

}

complex::complex(float r ,float i)

{

x05real = r;

x05imag = i;

}

complex::complex(complex &c)

{

x05real = c.real;

x05imag = c.imag;

}

void complex::set(float r,float i)

{

x05real = r;

x05imag = i;

}

void complex::show()

{

x05cout