13-4.c

17个C源程序分享

#include <AT89X51.H>
#include <stdio.h>

int Count(void); //声明函数

void main(void)
{

	unsigned int temp;

	SCON = 0x50; //串口方式1,允许接收
	TMOD = 0x20; //定时器1定时方式2
	TCON = 0x40; //设定时器1开始计数
	TH1 = 0xE8;	//11.0592MHz 1200波特率
	TL1 = 0xE8;
	TI = 1;
	TR1 = 1; //启动定时器
	
	temp = Count();
	printf ("1-10 SUM=%d\n",temp); //显示
	while(1);
}

int Count(void)
{
	unsigned int I, SUM;
	
	for (I=1; I<=10; I++) 
		{
			SUM = I + SUM; //累加
		}
	return (SUM);
}