samples/snippets/csharp/programming-guide/string-to-number/convert/Program.cs - main - aprogrammer/dotnet-docs

samples/snippets/csharp/programming-guide/string-to-number/convert/Program.cs

56 строк2 KB

Genevieve Warren

Fix nullability warnings (remaining /samples/snippets/csharp projects) (#35176)

27 апр 2023, 20:58

27 апр 2023, 20:58ca8ed8a

using System;

public class ConvertStringExample1
{
    static void Main(string[] args)
    {
        int numVal = -1;
        bool repeat = true;

        while (repeat)
        {
            Console.Write("Enter a number between −2,147,483,648 and +2,147,483,647 (inclusive): ");

            string? input = Console.ReadLine();

            // ToInt32 can throw FormatException or OverflowException.
            try
            {
                numVal = Convert.ToInt32(input);
                if (numVal < Int32.MaxValue)
                {
                    Console.WriteLine("The new value is {0}", ++numVal);
                }
                else
                {
                    Console.WriteLine("numVal cannot be incremented beyond its current value");
                }
           }
            catch (FormatException)
            {
                Console.WriteLine("Input string is not a sequence of digits.");
            }
            catch (OverflowException)
            {
                Console.WriteLine("The number cannot fit in an Int32.");
            }

            Console.Write("Go again? Y/N: ");
            string? go = Console.ReadLine();
            if (go?.ToUpper() != "Y")
            {
                repeat = false;
            }
        }
    }
}
// Sample Output:
//   Enter a number between -2,147,483,648 and +2,147,483,647 (inclusive): 473
//   The new value is 474
//   Go again? Y/N: y
//   Enter a number between -2,147,483,648 and +2,147,483,647 (inclusive): 2147483647
//   numVal cannot be incremented beyond its current value
//   Go again? Y/N: y
//   Enter a number between -2,147,483,648 and +2,147,483,647 (inclusive): -1000
//   The new value is -999
//   Go again? Y/N: n