exam5.cpp

C++语言程序设计题典

#include <iostream.h>
class Sample
{
	float a;   //实部
	float b;   //虚部
public:
	Sample() {}
	Sample(float x,float y) { a=x;b=y; }
	void mult(Sample &s)      //对象引用作为参数
	{
		if (&s==this)    //不能自已相乘
			cout << "自已不能相乘" << endl;
		else
		{
			float x=a*s.a-b*s.b;
			float y=a*s.b+b*s.a;
			a=x;b=y;
		}
	}
	void disp()	
	{ 
		if (b>0)
			cout << a << "+" << b << "i" << endl; 
		else
			cout << a << "-" << -b << "i" << endl; 
	}
};
void main()
{
	Sample s1(2,3),s2(3,4);
	cout << "复数s1:";s1.disp();
	cout << "复数s2:";s2.disp();
    s1.mult(s2);
	cout << "相乘结果:";s1.disp();
	cout << endl;
}