【Solidity】Struct的使用方法

Struct和enum很类似，enum只能是数字，但是struct就比较丰富了，能够定义variable的种类

代码范例

// SPDX-License-Identifier: GPL-3.0

pragma solidity >=0.7.0 <0.9.0;

contract DemoStruct{

    struct car{
        string brand;
        uint year;
    }

    car[] public cars;
    function modify()public{
        car memory car1 = car("Toyota",2008); //声明struct, 方法1
        car memory car2 = car({year:2018,brand:"Honda"});//声明struct, 方法2
        car memory car3;//声明struct, 方法3
        car3.brand = "Nissan";
        car3.year = 2011;

        cars.push(car1);
        cars.push(car2);
        cars.push(car3);

        delete cars[0];//把第一个car给删除了，所以car0的值全部变成默认值
    }
}