关于结构体与字符串相互转换验证

Posted 2021-01-30 wzqstudy

/*************************************************************************
    > 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
",bbb.headName);
    printf("%s
",bbb.name);
    printf("%d
",bbb.num);
    printf("%s
",bbb.ip);
}

输出结果：

aaaaaaaaaaaaa
bbbbbbbbb
10
ccccccc

这里要注意结构体的字节对齐规则 

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