3-2.txt

思路很清晰的c++课件。例子很简明

例3.2  对3.1中的结构的改为类

#include <iostream.h>
#include <math.h>

class complex	//原定义为struct complex
{
	//数据成员
private:
	double real;	//实部
	double imag;	//虚部

	//函数成员
public:
	void init(double r,double i)
	{	real=r;
		imag=i;
	}

	double realcomplex() { return real;}
	double imagcomplex() { return imag; }
	double abscomplex()
	{
		double t;
		t=real*real+imag*imag;
		return sqrt(t);
	}
};

complex A;

void main()
{
	A.init(1.1,2.2);
	cout<<"A的实部="<<A.realcomplex()<<endl;
	cout<<"A的虚部="<<A.imagcomplex()<<endl;
	cout<<"A的绝对值="<<A.abscomplex()<<endl;
}