7.5.cpp

这是C++的一部分练习程序!对初学者有一定的帮助作用。

#include <iostream.h>
struct complex
{
	double re,im;
};
void main()
{
	struct complex z1,z2,add(struct complex,struct complex),
		     mulitiply(struct complex,struct complex);
	struct complex x={3.4,5.6},y={2.5,7.4};
	z1=add(x,y);
	z2=mulitiply(x,y);
	cout<<"x+y="<<z1.re<<"+i"<<z1.im<<endl;
	cout<<"x*y="<<z2.re<<"+i"<<z2.im<<endl;
}
struct complex add(struct complex x,struct complex y)
{
	struct complex z;
	z.re=x.re+y.re;
	z.im=x.im+y.im;
	return z;
}
struct complex mulitiply(struct complex x,struct complex y)
{
	struct complex z;
	z.re=x.re*y.re-x.im*y.im;
	z.im=x.re*y.im+x.im*y.re;
	return z;
}