/*************************************************************************
    > File Name: memtest.c
    > Author: 
    > Mail: 
    > Created Time: Thu 27 Dec 2018 05:47:37 PM CST
 ************************************************************************/

#include<stdio.h>
#define N 50
#define
 
 IPSIZE 15
struct ClientInfo{
    char headName[N];        
    char name[N];            
    int num;                
    char ip[IPSIZE];    
};

int main(int argc,char **argv)
{
    struct ClientInfo aaa;
    strcpy(aaa.headName,"aaaaaaaaaaaaa");
    strcpy(aaa.name,"bbbbbbbbb");
    aaa.num = 10;
    strcpy(aaa.ip,
 
"ccccccc");
    char buf[200];
    memcpy(buf,&aaa,sizeof(aaa));
    struct ClientInfo bbb;
    memcpy(&bbb,buf,sizeof(bbb));
    printf("%s\n",bbb.headName);
    printf("%s\n",bbb.name);
    printf("%d\n",bbb.num);
    printf("%s\n",bbb.ip);
}

輸出結果：

aaaaaaaaaaaaa
bbbbbbbbb
10
ccccccc

這裡要注意結構體的位元組對齊規則 

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