2-8.c

一些简单的c51程序

#include <stdio.h>
#include <reg51.h>
unsigned moveright(unsigned value, int n);
unsigned moveleft(unsigned value, int n);
main()

{
	unsigned a;
	int n;
	SCON = 0x50; 
TMOD |= 0x20; 
TH1 = 0xf3; 
TR1 = 1;
TI = 1; 
	printf("请数入一个8进制数：");
	scanf("%o", &a);
	printf("请输入要位移的位数：");
	scanf("%d", &n);
	if(n>0)
	{
	printf("循环右移的结果为：%o\n", moveright(a,n));
	}
	else
	{
		n=-n;
		printf("循环左移的结果为：%o\n", moveleft(a,n));
	}
}
unsigned moveright(unsigned value, int n)        //循环右移
{
	unsigned z;
	z=(value>>n)|(value<<(16-n));
	return z;
}
unsigned moveleft(unsigned value, int n)         //循环左移
{
	unsigned z;
	z=(value<<n)|(value>>(16-n));
	return z;
}