Question

namespace himiC_sharp
{
    class Program
    {
        static void Main(string[] args)
        {
            int x;
            do
            {
                Console.WriteLine("WELCOME TO THE SHOPPING CART!\nFollowing options are available to you:\n1. Add an item to cart\n2. Remove an item from the cart\n3. View the cart\n4. Checkout and Pay\n5. Exit");
                Console.WriteLine("please inter your chice");
                x = Console.Read();
                if (x == '1')
                {
                Console.WriteLine("Available items are:\n1.shirt\n2.pant\n3.shoes\n4.fish\n5.oil");
                Console.WriteLine("please inter the items name:");
                string j = Console.ReadLine();
                }
            } while (x != '5');
        }
   } 
}

但是当我希望接受像----

这样的输入时，程序不接受输入

但它在获取输入的状态下重复我的console.writeline（）方法

Answer 1

您的代码失败，因为Console.Read只读取输入流中的下一个字符我想你按1然后按回车键。 char 1由Console.Read读取，但换行符仍在缓冲区中当您的代码到达用户应该输入项目的Console.Readline时，ReadLine会在输入缓冲区中找到换行符并立即退出。

只需将您的Console.Read更改为Console.ReadLine，当然更改接收输入的变量的类型

string menuChoice;
do
{
    Console.WriteLine("WELCOME TO THE SHOPPING CART!\nFollowing options are available to you:\n1. Add an item to cart\n2. Remove an item from the cart\n3. View the cart\n4. Checkout and Pay\n5. Exit");
    Console.WriteLine("please inter your chice");
    menuChoice = Console.ReadLine();
    if (menuChoice == "1")
    {
      Console.WriteLine("Available items are:\n1.shirt\n2.pant\n3.shoes\n4.fish\n5.oil");
      Console.WriteLine("please inter the items name:");
      string j = Console.ReadLine();
    }
} while (menuChoice != "5");

Answer 2

尝试将ReadLine的输入解析为int：

        int choice;
        do
        {
            Console.WriteLine("WELCOME TO THE SHOPPING CART!\nFollowing options are available to you:\n1. Add an item to cart\n2. Remove an item from the cart\n3. View the cart\n4. Checkout and Pay\n5. Exit");
            Console.WriteLine("please inter your chice");
            choice = Int32.Parse(Console.ReadLine());
            if (choice == 1)
            {
                Console.WriteLine("Available items are:\n1.shirt\n2.pant\n3.shoes\n4.fish\n5.oil");
                Console.WriteLine("please inter the items name:");
                string j = Console.ReadLine();
            }
        } while (choice != 5);

Answer 3

尝试使用ReadLine（）并将输入转换为int，以便在if()

内进行比较

x = Convert.ToInt32(Console.ReadLine());

在c＃中使用if / else in do / while

3 个答案: