1、ubuntu 14.04 linux c
gcc (Ubuntu 4.8.2-19ubuntu1) 4.8.2
2、#include <stdio.h>
#include <string.h>
#include <stdlib.h>
long factorial(int n)
{
if(n == 1)
return 1;
else
return n*factorial(n-1);
}
int main(int argc,char *argv[])
{
int n = 0;
if(argc != 2)
{
printf("input error,exit!!\n");
return -1;
}
n = atoi(argv[1]);
printf("%d! = %ld\n",n,factorial(n));
return 0;
}
3、root@linux:~/code# gcc -o factorial factorial.c
root@linux:~/code# ./factorial 6
6! = 720
