递归函数求n！

#include<stdio.h>

int jc(int n)
{ int j;
if(n<0)
printf(“error!”);
else if(n==0||n==1)
j=1;
else
j=jc(n-1)*n;
return(j);
}
int main()
{
int jc(int);
int n;
int y;
printf(“input an integer number :”);
scanf(“%d”,&n);
y=jc(n);
printf(“%d!=%d\n”,n,y);
}