Calculator as Console Application

Giovanbattista Barra

Hallo,

I'm going to develop a simple calculator in Console Application (in Visual Studio).

For this task I have use Methods for the operations.

Here I wrote a piece of code

but it doesnt semm to work good when I start the program to check for the math operations:

//First the methods

static double Addieren(double plusA, double plusB)

{

return plusA + plusB;

}

static double Multiplizieren(double multiA, double multiB)

{

return multiA * multiB;

}

//methods call in Main method

public static void Main()

{

Console.WriteLine("Bitte Starten Sie eine Taschen Rechenoperation ein: ");

double x, y;

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

y = Convert.ToDouble(Console.ReadLine());

char result;

result = Convert.ToChar(Console.ReadLine());

switch (result)

{

case '+':

Console.WriteLine("Bitte Geben Sie eine Rechenoperation ein", Addieren(x, y));

break;

case '*':

Console.WriteLine("Bitte Geben Sie eine Rechenoperation ein", Multiplizieren(x, y));

break;

default:

Console.WriteLine("FEHLER!! Probier es nochmal...");

break;

}

Console.WriteLine("Rechneroperation fertig!");

}

//In the output console I get: erro exception by X (exatly where x must be read with "console.read")

Can you test it too, please? What is the mistake?

PS: According to the task of the teacher, I have to use the methods!

Best regards

Giovanni

2 Replies

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Thiyagarajan E7y ago
Accepted answer
Hi,

Try this piece of code. It will work for you.
static double Addieren(double plusA, double plusB)
{
return plusA + plusB;
}
static double Multiplizieren(double multiA, double multiB)
{
return multiA * multiB;
}
//methods call in Main method
public static void Main()
{
//Console.WriteLine("Bitte Starten Sie eine Taschen Rechenoperation ein: ");
Console.WriteLine("Enter First Number: ");
double x, y;
x = Convert.ToDouble(Console.ReadLine());
Console.WriteLine("Enter Second Number: ");
y = Convert.ToDouble(Console.ReadLine());
Console.WriteLine("Enter Arithmentic Operation: ");
char result;
result = Convert.ToChar(Console.ReadLine());
switch (result)
{
case '+':
//Console.WriteLine("Bitte Geben Sie eine Rechenoperation ein" + Addieren(x, y));
Console.WriteLine("Sum of Two values is : " + Addieren(x, y));
break;
case '*':
Console.WriteLine("multiplication of Two values is : " + Multiplizieren(x, y));
// Console.WriteLine("Bitte Geben Sie eine Rechenoperation ein", Multiplizieren(x, y));
break;
default:
Console.WriteLine("FEHLER!! Probier es nochmal...");
break;
}
//Console.WriteLine("Rechneroperation fertig!");
Console.WriteLine("Do You Wnat To Contine(Y/N): ");
string isContinue = Console.ReadLine();
if (isContinue.ToLower().Trim() == "y")
{
Main();
}
}
Thanks.
Giovanbattista Barra7y ago
Thanks a lot Thiyagarajan E!!

It really helped me!