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Thread: Windows Calculator.

  1. #1
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    Default Windows Calculator.

    Im trying to create a calculator similar to the windows standard calculator where in when you click "5" and then clicked "+" by mistake you just have to click "-" for the output to be "5 -" not "5 +". Problem is i don't know howto do that with my current code.

    try
    				{	
    					if(inpuDisplay.contains("."))
    					{
    						doubleResult = new Double(Double.parseDouble(inpuDisplay)).toString();
     
    						inpuDisplay = doubleResult;
    					}
     
    					else
    					{
    						doubleResult = new Integer(Integer.parseInt(inpuDisplay)).toString();
     
    						inpuDisplay = doubleResult;
    					}
     
    					resDisplay = inpuDisplay + " + ";
     
    					res2Display = res2Display + resDisplay;
     
    					inpu2Display = display.getText().toString();
     
    					input.setText(res2Display);
     
     
    					display.setText("");
     
    					if(add == true)
    					{
    						result = result + Double.parseDouble(inpu2Display);
     
    						minus = false;
    						mul = false;
    						div = false;
    					}
     
    					if(minus == true)
    					{			
    						if(result == 0)
    						{
    							result = Double.parseDouble(inpu2Display);
    						}
     
    						else if(result < 0)
    						{
    							result = result - Double.parseDouble(inpu2Display);
    						}
     
    						else if(result > 0)
    						{
    							result = result - Double.parseDouble(inpu2Display);
    						}
     
    						minus = false;
    						add = true;
    					}
     
    					if(mul == true)
    					{
    						if(result == 0)
    						{
    							result = Double.parseDouble(inpu2Display);
    						}
     
    						else
    						{
    							result = result * Double.parseDouble(inpu2Display);
    						}
     
    						mul = false;
    						add = true;
    					}
     
    					if(div == true)
    					{
    						if(result == 0)
    						{
    							result = Double.parseDouble(inpu2Display);
    						}
     
    						else
    						{
    							result = result / Double.parseDouble(inpu2Display);
    						}					
     
    						div = false;
    						add = true;
    					}
     
    					if(result % 1 == 0)
    					{
    						display.setText(Integer.toString((int)result));
    					}
     
    					else
    					{
    						display.setText(Double.toString(result));
    					}
     
    					inpuDisplay = "";
    					inpu2Display = "";
    				}
     
    				catch(Exception e)
    				{
     
    				}

    NOTE: The above code is executed when yhe "+" button is clicked. And is working i just have to add the replace sign function. Could someone please help?


  2. #2
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    Default Re: Windows Calculator.

    What exactly do you need help with? You've described your goal, but no what you're confused about. You also haven't provided an SSCCE (note that this should be as small as possible, not your whole program, but should also be runnable by us).
    Useful links: How to Ask Questions the Smart Way | Use Code Tags | Java Tutorials
    Static Void Games - Play indie games, learn from game tutorials and source code, upload your own games!

  3. #3
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    Default Re: Windows Calculator.

    I agree with all KW said, but I'm also confused why this is a problem. The action listeners for the arithmetic operation keys should be programmed to do what you've described.

  4. #4
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    Default Android Calculator like Windows Calculator

    Im trying to create a calculator similar to the windows standard calculator where in when you click "5" and then clicked "+" by mistake you just have to click "-" for the output to be "5 -" not "5 +". Problem is i don't know howto do that with my current code.

    try
    				{	
    					if(inpuDisplay.contains("."))
    					{
    						doubleResult = new Double(Double.parseDouble(inpuDisplay)).toString();
     
    						inpuDisplay = doubleResult;
    					}
     
    					else
    					{
    						doubleResult = new Integer(Integer.parseInt(inpuDisplay)).toString();
     
    						inpuDisplay = doubleResult;
    					}
     
    					resDisplay = inpuDisplay + " + ";
     
    					res2Display = res2Display + resDisplay;
     
    					inpu2Display = display.getText().toString();
     
    					input.setText(res2Display);
     
     
    					display.setText("");
     
    					if(add == true)
    					{
    						result = result + Double.parseDouble(inpu2Display);
     
    						minus = false;
    						mul = false;
    						div = false;
    					}
     
    					if(minus == true)
    					{			
    						if(result == 0)
    						{
    							result = Double.parseDouble(inpu2Display);
    						}
     
    						else if(result < 0)
    						{
    							result = result - Double.parseDouble(inpu2Display);
    						}
     
    						else if(result > 0)
    						{
    							result = result - Double.parseDouble(inpu2Display);
    						}
     
    						minus = false;
    						add = true;
    					}
     
    					if(mul == true)
    					{
    						if(result == 0)
    						{
    							result = Double.parseDouble(inpu2Display);
    						}
     
    						else
    						{
    							result = result * Double.parseDouble(inpu2Display);
    						}
     
    						mul = false;
    						add = true;
    					}
     
    					if(div == true)
    					{
    						if(result == 0)
    						{
    							result = Double.parseDouble(inpu2Display);
    						}
     
    						else
    						{
    							result = result / Double.parseDouble(inpu2Display);
    						}					
     
    						div = false;
    						add = true;
    					}
     
    					if(result % 1 == 0)
    					{
    						display.setText(Integer.toString((int)result));
    					}
     
    					else
    					{
    						display.setText(Double.toString(result));
    					}
     
    					inpuDisplay = "";
    					inpu2Display = "";
    				}
     
    				catch(Exception e)
    				{
     
    				}

    NOTE: The above code is executed when yhe "+" button is clicked. And is working i just have to add the replace sign function. Could someone please help?

  5. #5
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    Default Re: Android Calculator like Windows Calculator

    Please don't start duplicate topics.

    Continue working this problem in the original post, adding any clarifications and changes in direction there as needed. If that original topic needs to be moved to another subforum, please ask a mod to do that for you.

  6. The Following User Says Thank You to GregBrannon For This Useful Post:

    jps (August 28th, 2013)

  7. #6
    Super Moderator jps's Avatar
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    Default Re: Windows Calculator.

    Threads merged

  8. #7
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    Default Re: Windows Calculator.

    opss sorry. just found out that there is an android section here. coz my im doing this in Eclipse for my android project.

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