Factorial/영동

~cpp #include<iostream.h>
main()
{
	int sum=1;
	int i, num;
	cout<<" input number: ";
	cin>>num;
	if (num <= 1)          /*->수정*/
             return 0;
         else                   /*->수정 끝*/
             for(i=num;i>1;i--)
	        sum=sum*i;
	cout<<sum<<"\n";
}