常用memory 的c 库函数

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
unsigned char read_buffer[12];
unsigned char write_buffer[12];

int main()
{
    int i,j;
    memset(read_buffer,0,12);
    memset(write_buffer,0,12);
    for(i=0; i<sizeof(write_buffer); i++)
    {
        write_buffer[i]=i;
        printf("\r\n%02x",write_buffer[i]);
    }
    memcpy(read_buffer,write_buffer,12);
    
    for(j=0; j<sizeof(read_buffer); j++)
    {
        // if(read_buffer[j] != write_buffer[j])
        if(memcmp(read_buffer,write_buffer,12) !=0)
          printf("\r\n%02x",read_buffer[j]);
    }
	return 0;
}