ex1.c

零基础单片机C语言设计全套教程

#include<string.h> 							//头文件
#include<stdio.h>
#include <reg51.h>

void	main(void)			  				//主函数
{
static char str[20]="This is a test!";
void *pc;

//初始化串口

pc=memchr(str,'a',sizeof(str));					//查找字符'a'
if(pc!=NULL)								//找到字符
	printf("found 'a' in this string\n");
else										//未找到字符
	printf("'a' was not found in this string\n");
}