結構體初始化

#include <stdio.h>
//結構體的宣告和定義方法
//1.宣告和定義分離
struct weapon{
    char name[20];
    int atk;
    int price;
}; //宣告
//定義
struct weapon weapon_1; 
//====================================
//
//2.同時進行宣告和定義，只適用於簡單的程式
struct weapon
{
    char name[20];
    int atk;
    int price;
}weapon_1;

結構體的訪問

#include <stdio.h>
 


//結構體的宣告
struct weapon{
    char name[20];
    int atk;
    int price;
};

int main()
{
    //結構體的初始化
    struct weapon weapon_1 = {"weapon_name",100,200};

    //結構體的訪問
    //weapon_1.name
    printf("%s,%d\n",weapon_1.name,weapon_1.price);

    //結構體陣列，陣列元素是結構體
    //定義一個結構體陣列
    //struct weapon weapon_2[2]={"weapon_name1",50,100,"weapon_name2",100,200};
 

    //printf("%s,%d\n",weapon_2[0].name,weapon_2[1].atk);//訪問結構體陣列索引0的name,索引1的atk
    //或
    //建議使用這種方式，更直觀
    struct weapon weapon_2[2]={{"weapon_name1",50,100},{"weapon_name2",100,200}};

    printf("%s,%d\n",weapon_2[0].name,weapon_2[1].atk);//訪問結構體陣列索引0的name,索引1的atk
    return 0;
}

結構體指標

#include <stdio.h>
 


//結構體的宣告
struct weapon{
    char name[20];
    int atk;
    int price;
};

int main()
{
    //結構體的初始化
    struct weapon weapon_1 = {"weapon_name",100,200};
    //結構體指標
    struct weapon * w;// w是指向struct weapon 型別的指標
    w = &weapon_1;// w 指向weapon_1
    //1.(*w).name // 括號不能省，因為.的優先順序比()的優先順序高
    //2.w->name // 結構體中C語言允許使用指向運算子->
    printf("%s,%s\n",(*w).name,w->name);//兩種方式等價


    struct weapon weapon_2[2] = {{"weapon_name1",50,100},{"weapon_name2",100,200}};;
    struct weapon * p;
    p = weapon_2;//p存放weapon_2中第一個結構體的地址，p->name與weapon_2[0].name等價
    printf("%s\n",p->name);
    p++;//p指向weapon_2第二個結構體，等價於weapon_2+1,weapon_2[1]
    printf("%s\n",p->name);
    return 0;
}