结构体数组

#include<stdio.h>
#include<stdlib.h>

//  结构体数组的定义

struct // 匿名结构体 主要作用是锁定变量的个数
{
    int num;
    double db;
}*p,x[10],z; // p是指针  x是数组 z 是变量

// 匿名结构体 如果有指针  指针可以开辟空间  不能锁定其数量


struct MyStruct
{
    int id;
    char str[10];
}my2[10];// 第二种定义方式

void main()
{
    //struct MyStruct my1[10];// 第一种定义方式
    //struct MyStruct *p = (struct MyStruct[10]){ 0 };// 栈上开辟 结构体一维数组
    //struct MyStruct my[] = { { 10, "123" }, { 20, "456" } };// 结构体初始化一般形式
    //struct MyStruct *p = (struct MyStruct[10]){ { 10, "123" }, { 20, "456" } };

    //struct MyStruct my[2] = { 10, "123", 20, "456" };// 可以  将其大括号去掉
    //struct MyStruct my[2] = { 10, 20,"123", "456" };// 顺序颠倒 编译时出现警告 一定要遵循顺序
    
    struct MyStruct my[2] = { { 0 }, { 0 } };// 初始化为空  全部设为 0 即可
    system("pause");
}

//////////////////////////////////////////////////////////////////////////

struct csdn
{
    char name[100];
    char password[100];
    char email[100];
}csdndata[3] = {
    { "cmt", "12344321", "cmt@csdn.net" },
    { "GongBo ", " 6702039874512 ", "GongBo@163.com" },
    { "wudragon", "265879452 ", " wudragon@tom.com" }
},*pcsdn;

void main()
{
    pcsdn = (struct csdn[]){
        { "cmt", "12344321", "cmt@csdn.net" },
        { "GongBo ", " 6702039874512 ", "GongBo@163.com" },
        { "wudragon", "265879452 ", " wudragon@tom.com" }
    };

    for(int i = 0; i < sizeof(csdndata) / sizeof(csdndata[0]);i++)
    {
        //char *p = strstr(csdndata[i].email, "GongBo@163.com");
        //char *p = strstr((&csdndata[i])->email, "GongBo@163.com");// a.b <=> &a->b   p->b <=> (*p).b
        
        //char *p = strstr(pcsdn[i].email, "GongBo@163.com");
        //char *p = strstr((pcsdn+i)->email, "GongBo@163.com");

        char *p = strstr((*(pcsdn + i)).email, "GongBo@163.com");

        if (p != NULL)
        {
            puts(csdndata[i].password);
        }

    }

    system("pause");
}