help me please this is a calculator by the way

What did I do wrong here? I was trying to make a calculator for my AP Comp Science class and it turned out now to work.. I followed the teachers instructions but it didn't work. Does anyone have any suggestions on how to fix this?Thanks :)

Code java:

import java.util.*;
public class d
{
public static void main(String[] args)
{
/*Scanner input = new Scanner(System.in);
System.out.println("What are you doing?");
if (answer.equalsIgnorecase("multiplication"))
{
Multiplication();
}*/
System.out.println("Hello, If you are doing Multiplication Type 1.");
System.out.println("If you are doing Addition, Type 2.");
System.out.println("If you are doing Subtraction, Type 3");
System.out.println("If you are doing Division, Type 4");
Scanner input = new Scanner(System.in);
int decision;
decision = input.nextInt();
if (decision == 1)
{
Multiplication();
}
if (decision == 2)
{
Addition();
}
if (decision == 3)
{
Subtraction();
}
if (decision == 4)
{
Division();
}
else {
System.out.println("Those aren't valid numbers.");
}
}
}
public static void Multiplication()
{
int mInput1;
int mInput2;
Scanner input = new Scanner(System.in);
System.out.print("What is the first number? ");
mInput1 = input.nextInt();
System.out.print("What is the second number? ");
mInput2 = input.nextInt();
System.out.println(mInput1 + " times " + mInput2 + " equals " + mInput1 * mInput2);
}
public static void Addition()
{
int aInput1;
int aInput2;
int aAnswer;
Scanner input = new Scanner(System.in);
System.out.println("What is the first number?");
aInput1 = input.nextInt();
System.out.println("What is the second number?");
aInput2 = input.nextInt();
aAnswer = aInput1 + aInput2;
System.out.println(aInput1 + " plus " + aInput2 + " equals " + aAnswer);
}
public static void Subtraction()
{
int sInput1;
int sInput2;
int sAnswer;
Scanner input = new Scanner(System.in);
System.out.println("What is the first number?");
sInput1 = input.nextInt();
System.out.println("What is the second number?");
sInput2 = input.nextInt();
sAnswer = sInput1 - sInput2;
System.out.println(sInput1 + " minus " + sInput2 + " equals " + sAnswer);
}
public static void Division()
{
int dInput1;
int dInput2;
int dAnswer;
Scanner input = new Scanner(System.in);
System.out.println("What is the first number?");
dInput1 = input.nextInt();
System.out.println("What is the second number?");
dInput2 = input.nextInt();
dAnswer = dInput2 / dInput1;
System.out.println(dInput1 + " divided by " + dInput2 + " equals " + dAnswer);
}
}

Re: help me please this is a calculator by the way

Quote:

What did I do wrong here

Please explain.

The first problem I see is the classname. d????

Please edit your post and wrap your code with code tags:

[code=java]

YOUR CODE HERE

[/code]

to get highlighting and preserve formatting.

Re: help me please this is a calculator by the way

Oh thank you I fixed it... First time here...

Re: help me please this is a calculator by the way

Please explain.

The first problem I see is the classname. d????

1 out of 3 is a start.