2-11.c

c实现的常用几个算法

#include<stdio.h>
void main(void)
{ 
	int n,i;
	long fac;
	printf("input n:\n");
	scanf("%d",&n);
	fac=1;
	for(i=1;i<=n;i++)
		fac*=i;
	printf("%d!=%d\n",n,fac);
}