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  1. #1
    Akar-Slemany is offline Member
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    Default Rate my app : Simple Calculator

    Here's a simple calculator that i made with java , i am very new java programming.

    Here's my code, i hope you like it.
    Java Code:
    import java.util.Scanner;
    
    
    public class Main {
    	
    	private static Scanner input; //define a private Scanner named input
    
    	public static void main ( String args[]){ 
    		
    		input = new Scanner(System.in);
    		 double fnum;//define first number
    		 double snum;// define second number;
    		 double answer; // define answer
    		
    		System.out.println("Please enter a number : "); // prompt user to enter first number.
    		fnum = input.nextDouble(); // store a number in fnum Scanner Variable
    		
    		System.out.println("Enter a second number :");//  prompt user to enter second number.
    		snum = input.nextDouble(); //store a number in snum Scanner Variable
    		
    		
    		answer = fnum + snum;
    		System.out.println("Plus : "+answer);
    		answer = fnum - snum;
    		System.out.println("Minus : "+answer);
    		answer = fnum * snum;
    		System.out.println("Multiply : "+answer);
    		answer = fnum / snum;
    		System.out.println("Divide = " + answer);
    		
    		
    	}
    
    }

  2. #2
    JosAH's Avatar
    JosAH is offline Moderator
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    Default Re: Rate my app : Simple Calculator

    Type 0.0 for the second number and see ... then type utter nonsense for one or both of the numbers and see again ...

    kind regards,

    Jos
    The only person who got everything done by Friday was Robinson Crusoe.

  3. #3
    Akar-Slemany is offline Member
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    Default Re: Rate my app : Simple Calculator

    Thanks for telling me that

    I cleared out that bug

    here's new one :

    Java Code:
    import java.util.Scanner;
     
     
    public class Main {
         
        private static Scanner input; //define a private Scanner named input
     
        public static void main ( String args[]){ 
             
            input = new Scanner(System.in);
             double fnum;//define first number
             double snum;// define second number;
             double answer; // define answer
             
            System.out.println("Please enter a number : "); // prompt user to enter first number.
            fnum = input.nextDouble(); // store a number in fnum Scanner Variable
             
            System.out.println("Enter a second number :");//  prompt user to enter second number.
            snum = input.nextDouble(); //store a number in snum Scanner Variable
            if (fnum == 0.0 && snum == 0.0  )
            {
            	System.out.println("Cannot Calculate two zeros");
            }
            
            else {
            	
           
         
             
            answer = fnum + snum;
            System.out.println("Plus : "+answer);
            answer = fnum - snum;
            System.out.println("Minus : "+answer);
            answer = fnum * snum;
            System.out.println("Multiply : "+answer);
            answer = fnum / snum;
            System.out.println("Divide = " + answer);
            }
            
          
             
             
        }
     
    }

  4. #4
    JosAH's Avatar
    JosAH is offline Moderator
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    Default Re: Rate my app : Simple Calculator

    But now your calculator can't do, say, 0+0; it should refuse to divide by zero only.

    kind regards,

    Jos
    The only person who got everything done by Friday was Robinson Crusoe.

  5. #5
    CuppaCoffee's Avatar
    CuppaCoffee is offline Member
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    Default Re: Rate my app : Simple Calculator

    Why did you declare the scanner globally when you're only using it in one place?

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