123456789 【程序填空】 题目：下面程序的功能是用递归法求n!. ＃include <stdio.h> ／＊＊＊＊＊＊＊＊＊＊＊SPACE***********/ long fac (int) ; void main () 1415161718 ｝ int n;long yjprintf ("input an integer number: ") ;scanf ("%d", &n) ;if (n <0)printf ("n <0,data error! ") ; else［ 2324 ＊＊＊＊＊＊＊＊＊＊＊3** y=long fac (int) # ;fac (n) #;fac (n-1) *n;printf ("%d! =%1d\n",n,y) ;I long fac (int n) 333435363738394041 ｝ long f;if (n==0||n==1)f=1;else／＊＊＊＊＊＊＊＊＊＊＊SPACE***********/f=n*fac (n-1) ;return (f) ; 程序填空 - 第1题 - 10. 0 关闭 ＜＜答题说明＞＞

下面是填空部分的答案：

long fac(int n)
{
    long f;
    if (n == 0 || n == 1)
        f = 1;
    else /*＊＊＊＊＊＊＊＊＊＊＊SPACE***********/
        f = n * fac(n - 1);
    return (f);
}