#include int jieCheng(int n){ if (1 == n || 0 == n) { return 1; } return n*jieCheng(n -1);}int main(){ printf("请输入n的值：\n"); int n = 0; scanf("%d", &n); printf("%d! = %d \n", n, jieCheng(n)); return 0;}
运行结果：
