2.3-1.txt

介绍C程设计的一典型案例：例如编写一些小游戏

#include<stdio.h>
int main(void)
{
	int i,m,sum;
	sum=0;
	printf("Enter a number:");
	scanf("%d",&m);
	if(m<0)
	{
		printf("The number you enter is fault!\n");
	}
	if(m>=0 && m<=100)
	{
		for(i=m;i<=100;i++)
		{
			sum=sum+i;
		}
		printf("sum=%d\n",sum);
	}
	else
	{
		printf("The number you enter is fault!\n");
	}
	return 0;
}