How do I print zero in calculator?

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So im a beginner and i needed to create a calculator. The problem is i downt know how to make it so that if "4 / 0 = 0; 9/0= 0" and so on.

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

namespace Sav4
{
    class Program
    {
        static void Main(string[] args)
        {
            
            char x;
            double a;
            double b;
            double ats;
            Console.WriteLine("insert first number ");
            a = double.Parse(Console.ReadLine());
            Console.WriteLine("insert second number ");
            b = double.Parse(Console.ReadLine());
            Console.WriteLine("insert inc "); // - + * /
            x = (char)Console.Read();
            Console.Clear();
            if (x == '-' )
            {
                ats = a - b;
                Console.WriteLine("{0} - {1} = {2}", a, b, ats);
            }
            else
            {
                if (x == '+')
                {

                    ats = a + b;
                    Console.WriteLine("{0} + {1} = {2}", a, b, ats);
                }
                else
                {
                    if (x == '*')
                    {
                        ats = a * b;
                        Console.WriteLine("{0} * {1} = {2}", a, b, ats);
                    }
                    else
                    {
                        if (x == '/')
                        {
                            ats = a / b;
                            if (a/b != 0)
                            {
                                Console.WriteLine("{0} / {1} = {2}", a, b, ats);
                            }
                            else
                            {
                                Console.WriteLine("Lygybe neegzistuoja", a, b, ats);
                            }
                        }
                        else
                        {
                            Console.WriteLine("Error");
                        }
                        } }
                }
            }
            }

        }

What I have tried:

I guess thinking a lot thats it

Posted 14-Sep-18 23:21pm

Member 13975230

Updated 15-Sep-18 0:30am

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OriginalGriff · Answer 1 · 2018-09-14T23:40:00

If b is zero, then trying to do this:

C#

ats = a / b;

will give you an exception because division by zero does not give you a "real world" number you can store in a double
Very definately, 0 is not the correct result!

So there are two ways to handle it:
1) Check before you divide! Put a quick test in before you try, and report a problem if it won't work instead of doing it.
2) Use a try...catch block to detect errors and handle them gracefully: try-catch (C# Reference) | Microsoft Docs[^]

Sunnys72 · Answer 2 · 2018-09-15T00:31:00

Hi there,

Following is the code to print zero if we are dividing any double by zero.
Suppose we have:

double a = 10, b = 0, c=0;
          try
          {
              c = double.IsInfinity(a / b) ? 0 : a / b;
          }
          finally
          {
              Console.WriteLine(c);
          }

Quote:
Here if we are using double, then we are not getting the exception "DivideByZeroException" then it just returns infinity. Double has also a method to check the infinity i.e. "double.IsInfinity()". Using this method you can check whether the result is infinity or not and you can take appropriate action.

In your case, the code will be :

arts=double.IsInfinity(a / b) ? 0 : a / b;

Thanks.

How do I print zero in calculator?

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