l5_25.cpp

《C++程序设计教程》电子教案及例题源码

#include <iostream.h>
void main()
{
	int a, *p1, **p2;
	double b, *p3, **p4;
	a=10;
	b=22.3;
	p1 = &a;
	p3 = &b;
	p2 = &p1;
	p4 = &p3;
	cout << a << "  " << *p1 << "  " << **p2 << endl;
	cout << b << "  " << *p3 << "  " << **p4 << endl;
	**p2 = 20;
	**p4 = 45.8;
	cout << a << "  " << *p1 << "  " << **p2 << endl;
	cout << b << "  " << *p3 << "  " << **p4 << endl;
}