3-8.txt

思路很清晰的c++课件。例子很简明

#include <iostream.h>
#include <math.h>
class complex{
private:
	double real;
	double imag;
public:
	complex(double r=0.0,double i=0.0){
		cout<<"construction…"<<endl;
		real=r;	imag=i;
	}
	~complex(){
		cout<<"destruction…"<<endl;
	}
	double abscomplex(){
		double t;
		t=real*real+imag*imag;
		return sqrt(t);
	}
};
void main()
{	complex A(1.1,2.2);
	cout<<"abs of complex A="<<A.abscomplex()<<endl;
}