2_9.cpp

《C++程序设计技能百练》一书的随书光盘内的源代码。

#include <iostream.h>
void main()
{
	int x,j=0;
	
	do
	{
	cout<<"Input a number:";
	cin>>x;
				
	if ((x%3==0) && (x%5==0) && (x%7==0))
		cout<<endl<<x<<" can be devided by 3,5 and 7."<<endl;
	else
		if (x%3==0)
		 if (x%5==0)
			cout<<endl<<x<<" can be devided by 3 and 5."<<endl;
		  else 
			if (x%7==0)
				cout<<endl<<x<<" can be devided by 3 and 7."<<endl;
			else
				cout<<endl<<x<<" can be devided by 3."<<endl;
		else 
		 if (x%5==0)
			if (x%7==0)
				cout<<endl<<x<<" can be devided by 5 and 7."<<endl;
			else
				cout<<endl<<x<<" can be devided by 5."<<endl;
		 else
			if (x%7==0)
				cout<<endl<<x<<" can be devided by 7."<<endl;
			else
				cout<<endl<<x<<" cann't be devided by 3,5 or 7."<<endl;
   j++;
   }while (j<=2);
}