ex1.c

零基础单片机C语言设计全套教程

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

void	main(void)			  				//主函数
{
int	*p;									//指针指向整型元素
int *newp;

//初始化串口

p=malloc(15);								//申请内存
if(p==NULL)
	printf("Fail allocating array\n");
else
{
	printf("New array address is %p\n",(void*)p);	//输出地址
	newp= realloc(p,20);						//重新分配内存
	if(newp==NULL)
		printf("Fail allocating array\n");
	else									//输出地址
		printf("New array address is %p\n",(void*)newp); 
}
}