C语言相关程序

#include<iostream.h>
class p_example
{
	int num;
public:
	void set_num(int val)
	{
		num=val;
	}
	void show_num()
	{
		cout<<num<<'\n';
	}
};
/*void p_example::show_num()
{

}*/
main()
{
	p_example ob,*p;
	ob.set_num(1);
	ob.show_num();
	p=&ob;
	p->show_num();
}