Question

我正在尝试学习编程，我编写了一个代码，用于将项目添加到ArrayList中。有许多for循环，每个循环都在特定的时间间隔内运行，这给了我正确的结果。但是对于循环，我尝试了一个for循环使用IF Else语句，而这个doenots给了我正确的结果请任何人检查并告诉我哪里出错了吗？

  ArrayList dogs = new ArrayList();
        ArrayList cats = new ArrayList();
        ArrayList rabbits = new ArrayList();
        ArrayList guineaPigs = new ArrayList();
        ArrayList birds = new ArrayList();
        ArrayList ferrets = new ArrayList();

        //Before
        for (int i = 0; i < 20; i++)
        {
            dogs.Add(new Animal(240.00, "D-PUP" + i));
        }
        for (int i = 0; i < 15; i++)
        {
            dogs.Add(new Animal(190.00, "D-JUN" + i));
        }
        for (int i = 0; i < 10; i++)
        {
            dogs.Add(new Animal(120.00, "D-ADU" + i));
        }
        for (int i = 0; i < 5; i++)
        {
            dogs.Add(new Animal(60.50, "D-SEN" + i));
        }
        //Before            
        for (int i = 0; i < 25; i++)
        {
            cats.Add(new Animal(220.00, "C-KIT" + i));
        }
        for (int i = 0; i < 30; i++)
        {
            cats.Add(new Animal(180.50, "C-JUN" + i));
        }
        for (int i = 0; i < 15; i++)
        {
            cats.Add(new Animal(120.00, "C-ADU" + i));
        }
        for (int i = 0; i < 10; i++)
        {
            cats.Add(new Animal(50, "C-SEN" + i));
        }
        //Before            
        for (int i = 0; i < 15; i++)
        {
            rabbits.Add(new Animal(120.75, "R-KIT" + i));
        }
        for (int i = 0; i < 15; i++)
        {
            rabbits.Add(new Animal(40.00, "R-ADU" + i));
        }
        //Before 
        for (int i = 0; i < 5; i++)
        {
            guineaPigs.Add(new Animal(15.00, "G-PUP" + i));
        }
        for (int i = 0; i < 10; i++)
        {
            guineaPigs.Add(new Animal(7.50, "G-ADU" + i));
        }
        //Before
        for (int i = 0; i < 2; i++)
        {
            birds.Add(new Animal(90.00, "B-CHI" + i));
        }
        for (int i = 0; i < 5; i++)
        { 
            birds.Add(new Animal(65.00, "B-ADU" + i));
        }           
        //Before
        for (int i = 0; i < 1; i++)
        {
            ferrets.Add(new Animal(150.00, "F-PUP" + i));
        }
        for (int i = 0; i < 3; i++)
        {
            ferrets.Add(new Animal(120.00, "F-ADU" + i));
        }
        for (int i = 0; i < 2; i++)
        {
            ferrets.Add(new Animal(30.50, "F-SEN" + i));
        }
        //After
        int j = 30;
        int i;
        for(i = 0; i < j; i++)
        {
            if(i < 1)
            {
                ferrets.Add(new Animal(150.00, "F-PUP" + i));
            }
            if(i < 2)
            {
                birds.Add(new Animal(90.00, "B-CHI" + i));
                ferrets.Add(new Animal(30.50, "F-SEN" + i));
            }
            if(i < 3)
            {
                ferrets.Add(new Animal(120.00, "F-ADU" + i));
            }
            if(i < 5)
            {
                dogs.Add(new Animal(60.50, "D-SEN" + i));
                guineaPigs.Add(new Animal(15.00, "G-PUP" + i));
                birds.Add(new Animal(65.00, "B-ADU" + i));
            }

            if(i < 10)
            {
                dogs.Add(new Animal(120.00, "D-ADU" + i));
                cats.Add(new Animal(50, "C-SEN" + i));
                guineaPigs.Add(new Animal(7.50, "G-ADU" + i));
            }
            if(i < 15)
            {
                dogs.Add(new Animal(190.00, "D-JUN" + i));
                cats.Add(new Animal(120.00, "C-ADU" + i));
                rabbits.Add(new Animal(120.75, "R-KIT" + i));
                rabbits.Add(new Animal(40.00, "R-ADU" + i));   
            }
            if(i < 20)
            {
                dogs.Add(new Animal(240.00, "D-PUP" + i));
            }
            if(i < 25)
            {
                cats.Add(new Animal(220.00, "C-KIT" + i));   
            }
            if(i < 30)
            {
                cats.Add(new Animal(180.50, "C-JUN" + i));
            }
        }

Answer 1

这不是编写代码的最佳方式，因为它令人困惑，而且正如您所看到的，使事情变得难以理解。理解你需要30只猫并且＃34; C-JUN＆＃34;

真的很复杂

使用单独的for循环保留您的第一个选项，或者更改为dogs.AddRange(Enumerable.Range(0, 20).Select(i=>new Animal(240.00, "D-PUP" + i)))

单循环给出不同于循环的结果

1 个答案: