#include <stdio.h>
int main(void)
{
    int   i, n;
    long  p = 1;
    printf("Please enter n:");
    scanf("%d", &n);
    for (i=1; i<=n; i++)
    {
        p = p * i;
        printf("%d! = %ld\n", i, p);     /* 输出1～n之间的所有数的阶乘值 */
    }
    return 0;
}