[Postmortis]

Good basic calculator,


Slightly modified to so it gives you an error when you divide by zero unless you divide 0 by 0 itself if your interested...

Spoiler (Click to View)

import java.util.Scanner;

/
@author Co-exist aka eXero /
public class Main {

/
@param args the command line arguments
/
public static void main(String[] args)
{
Scanner keyboard = new Scanner(System.in);
String operator;

double result = 0;
System.out.println("Please enter a number:");

double num1 = keyboard.nextDouble();
System.out.println("Please enter another number:");

double num2 = keyboard.nextDouble();

System.out.println("Enter an expression: ");
operator = keyboard.next();
if (operator.equals("+"))
{
result = num1 + num2;
System.out.println("\n" + num1 + operator + num2 + "=" + result + "\n" );
}
else if (operator.equals("-"))
{
result = num1 - num2;
System.out.println("\n" + num1 + operator + num2 + "=" + result + "\n" );
}
else if (operator.equals("*"))
{
result = num1 num2;
System.out.println("\n" + num1 + operator + num2 + "=" + result + "\n" );
}
if (operator.equals("/"))
{
if ((num1 == 0) && (num2 == 0))
{
System.out.println("\n" + num1 + operator + num2 + "=" + result + "\n" );
}
else if ((num1 != 0) && (num2 == 0))
{
System.out.println ("\n" + "Cannot Divide by Zero mate" + "\n" + "\n");
}
else
{
result = num1 / num2;
System.out.println("\n" + num1 + operator + num2 + "=" + result + "\n" );
}
}

}

}






I am not flaming, just posting this if you wanted to find out how to fix this 'problem'.

[Batch™]

I like it..I mean im not into Java im into Python but still this is a good and easy tutorial even I could understand.

[TheBlackMarket]

Thanks Mate =). This was helpful. Good Share.

[eXero]

thanks all you positive commenters. and thanks postmortis for you zero devision source code.

[pro-phecy]

I know i'm bringing this thread back from the grave, but I am a just starting java as of Wednesday and I was wondering if it was possible to put a space between the numbers. I put a space around the " = " so the result and second number would be space out, but my problem was figuring out a way to put a space around the operator. Since operator could be 1 of 4 commands, how would you right the if statement for each command to put a space around the operator. If you know what I'm trying to describe...

[Ben121]

I know i'm bringing this thread back from the grave, but I am a just starting java as of Wednesday and I was wondering if it was possible to put a space between the numbers. I put a space around the " = " so the result and second number would be space out, but my problem was figuring out a way to put a space around the operator. Since operator could be 1 of 4 commands, how would you right the if statement for each command to put a space around the operator. If you know what I'm trying to describe...

At least your post isn't a retarded one like most grave digging posts.
Try something like this:

Code

System.out.println(num1 + " " + operator + " " + num2 + " = " + result);

Is that what you mean?

[pro-phecy]

yeah, that's exactly what I meant! I tried to put the space between the + signs like

Code

System.out.println(num1 " " + operator " " + num2 + " = " + result);

when using a space in a calculation, do you always put (+) around a space? so it prints it or how does that work?

and thanks once again Ben!

[BeezyB]

How is this an advanced calculator?

[MrZander]

Ehh it's not what I would call "advanced"

Maybe if it did like log and trig functions, or at the very least square roots and exponents

[pro-phecy]

How is this an advanced calculator?

read the entire post and you'll see that your post was redundant

[BeezyB]

read the entire post and you'll see that your post was redundant

Nah bro 😅

It's a public forum for public opinions, if that's how I feel, I can most certainly express it 👍

[pro-phecy]

Nah bro 😅

It's a public forum for public opinions, if that's how I feel, I can most certainly express it 👍

I'm not saying you can't express it, but your question and answer has already been posed and answered, which makes it "seem" redundant.

[BeezyB]

I know i'm bringing this thread back from the grave, but I am a just starting java as of Wednesday and I was wondering if it was possible to put a space between the numbers. I put a space around the " = " so the result and second number would be space out, but my problem was figuring out a way to put a space around the operator. Since operator could be 1 of 4 commands, how would you right the if statement for each command to put a space around the operator. If you know what I'm trying to describe...

I'm not 100% sure what you're asking but maybe this little snippet of code will help:

Code

System.out.println(String.format("1 + 2 = %1$d", 1 + 2));

Try that, is that what you meant by "space around the operator"?

[Vuz]

fucking [censored].. meeehhhh -_--

[eXero]

Sorry bout the pics. I don't even have the pics anymore.