CODEWITHSUNDEEP
c#
user2224223
user2224223

Reputation: 45

Console.Read() does not capture the right information

I'm running a very simple program that just prompts the user for a number, and for now, just prints it on the screen. But for some reason that I do not know of, the number i enter seems to add to the number 48.

for example: I enter 2 and it puts out 50

Is there some sort of fundamental law that I'am overseeing, or some sort of mistake I've made in my code

I'm a beginner, if you hadn't noticed

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            int Num;
            Console.WriteLine("Please Input Number of Rows you want to make in your pyrimid: ");
            Num = Console.Read();

            Console.WriteLine(Num);// Just to check if it is getting the right number
            Console.Read();//This is Here just so the console window doesn't close when the program runs

        }
    }
}

edit: Hate to be a bother but now getting this error for num = int.Parse(Console.Read()); as The best overloaded method match for 'int.Parse(string)' has some invalid arguments. Does this mean that i need an overload method?

Upvotes: 0

Views: 135

Answers (3)

gdoron
gdoron

Reputation: 150313

Console.Read returns char so when you cast it to int yo get the ASCII code of 2 which is 50! You should parse to int instead of (implicitly) casting it:

Num = int.Parse(Console.Read());

Notes:

  1. If the input can be a non numeric value, use int.TryParse
  2. The convention to local variables in C# is camelCase, so change Num to num.

Upvotes: 5

Parimal Raj
Parimal Raj

Reputation: 20595

Console.Read reads reads byte from Standard Input.

2 has a ASCII value of 50

You need to parse the value read from the console

Num = Int32.Parse(Console.Read()); // or Num = int.Parse(Console.Read());

Upvotes: 0

Knaģis
Knaģis

Reputation: 21495

Console.Read returns the character code and not the character itself.

char num = (char)Console.Read();
Console.WriteLine(int.Parse(num.ToString()));

This code is not ideal but it shows what is happening. Since you are expecting a digit to be entered you can also use

int num = Console.Read() - 48;

Upvotes: 1

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