/****************************************************************
题目：利用递归方法求5!。
*****************************************************************/
#include <stdio.h>
void main(void)
{
int num = 0;
int result = 0;
while(1)
{
printf("Pls input a num
");
scanf("%d",&num);
result = fn(num);
printf("%d! is %d
",num,result);
fflush(stdin);
}
}
int fn(int num)
{
int result = 0;
if(1>=num)
{
result = 1;
}
else
{
result = num*fn(num-1);
}
return result;
}