这两种实例方法之间的区别是什么

本文关键字：区别 是什么 之间 两种 实例方法 | 更新日期: 2023-09-27 18:28:56

这两个实例方法之间有什么区别？

public class Food
{
    public int apples;
    public int oranges;
    public int bananas;
    // Constructor #1
    public Food(int a, int o, int b) 
    { 
        apples = a;
        oranges = o;
        bananas = b;
    }
// Is this an instance
public Food myFood = new Food(5, 8, 1);
// Or this 
Food.myfood(5, 8, 1)

我更有经验的朋友说，是后一种情况，而不是第一种。

这两种实例方法之间的区别是什么

我觉得人们甚至没有阅读这个问题。答案：第一个是创建一个新的食品实例（前者）

Food myFood = new Food(3,4,5);

第二个错误设置了值。f 之后

Food myFood = new Food(3,4,5);
Console.WriteLine(myfood.Oranges) // prints 4;
myFood.Oranges = 3; // set the value of oranges for that object to 3
Console.WriteLine(myFood.Oranges); // prints 3;

我假设您忘记关闭类了。

public class Food
{
    public int apples;
    public int oranges;
    public int bananas;
    // Constructor #1
    public Food(int a, int o, int b) 
    { 
        apples = a;
        oranges = o;
        bananas = b;
    }
} // <----  you were missing this I assume
// If the following is in your main method, then myFood is an instance
// of the Food class. 
// you can do myFood.apples = 4; // very bad btw, having public variables.
public Food myFood = new Food(5, 8, 1);
// Not even sure what this is ... because you don't have a myFood on Food.
// If you would have a static property on your Food class (Yummy), then you
// could do something like Food.Yummy = what_ever_the_type_is ... 
Food.myfood(5, 8, 1)
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