Question

我有问题。我为练习写了一个控制台应用程序。程序反复要求用户输入一个数字，程序将数字加在一起，当用户输入“完成”时，程序将总数除以输入的数字。

所以我的问题是。该程序不符合，因为你看到我必须声明int converted = int.Parse（输入）;进入else子句，因为如果用户键入数字，程序将跳过前两个选项并将字符串转换为数字，程序继续应该，但因为我声明int转换为else，转换为else如果，不存在。

我知道由于范围可变，我必须将所有内容放在同一个括号中，但是如何？

bool keepGoing = true;
int total = 0;

//The loop begins, repeatedly asks the user for  numbers.
while (true)
{

     //Asks the user for numbers .
    Console.Write("Type a number:");
    string input = Console.ReadLine();

    // When user types in quit the program quits
    if (input == "quit")
    {
        break;
    }


    // When user types "done", dividing total with converted(entered numbers).
    else if (input == "done")
    {
         total /= converted;
        Console.WriteLine(total);
        continue;
    }

    // If user types a number, convert into integer and add total and converted together.
    else
    {
        try
        {
            int converted = int.Parse(input);
            total += converted;
            Console.WriteLine(total);             
        }

        // Tells the user to type again.
        catch (FormatException)
        {
            Console.WriteLine("Invalid Input, please type again");
        }
    }
}

Answer 1

此处给出的完整代码块 - ＆gt;

    int total = 0;
    int converted = 0;

    //The loop begins, repeatedly asks the user for  numbers.
    while (true)
    {

        //Asks the user for numbers .
        Console.Write("Type a number:");
        string input = Console.ReadLine();

        // When user types in quit the program quits
        if (input == "quit")
        {
            break;
        }


        // When user types "done", dividing total with converted(entered numbers).
        else if (input == "done")
        {
            total /= converted;
            Console.WriteLine(total);
            continue;
        }

        // If user types a number, convert into integer and add total and converted together.
        else
        {
            try
            {
                converted = int.Parse(input);
                total += converted;
                Console.WriteLine(total);
            }

            // Tells the user to type again.
            catch (FormatException)
            {
                Console.WriteLine("Invalid Input, please type again");
            }
        }
    }

变量范围如果/ if if block

1 个答案: