Programming Forums > Application Development > Java

pr0gm3r · Oct 11th, 2005, 4:21 AM

Hi guys,

I need your expertice to debug my recursion method...

Here is the problem:
I am trying to figure out how come my code is not working properly. The design and algorithm are correct but it seem that the recursion method did not fully return the whole value that passed.

I have two different recursion method but both of them are not returning the rest of the value .

below is the code:
1st recursion method

(Toggle Plain Text)

    public static int reverseDigit(int num)
    {   
        int reverseNum = 0;        
       
       if(num > 0) 
       {          
           reverseNum = reverseNum *10 + num % 10;
           return reverseDigit(num/10);       
       }        
       else
           return reverseNum;
    }

2nd Recursion method

(Toggle Plain Text)

    public static int reverseDigit(int num)
    {   
        int reverseNum = 0;        
       
       if(num < 0) 
       {          
           return reverseNum;
       }        
       
        else{
           reverseNum = reverseNum *10 + num % 10;
           return reverseDigit(num/10);       
        }
    }

Thank you for your help in advance.

Oct 11th, 2005, 4:21 AM	#1
pr0gm3r Hobbyist Programmer Join Date: Dec 2004 Location: CA Posts: 102 Rep Power: 4	Debug recursion method() Hi guys, I need your expertice to debug my recursion method... Here is the problem: I am trying to figure out how come my code is not working properly. The design and algorithm are correct but it seem that the recursion method did not fully return the whole value that passed. I have two different recursion method but both of them are not returning the rest of the value . below is the code: 1st recursion method (Toggle Plain Text) public static int reverseDigit(int num) { int reverseNum = 0; if(num > 0) { reverseNum = reverseNum 10 + num % 10; return reverseDigit(num/10); } else return reverseNum; } public static int reverseDigit(int num) { int reverseNum = 0; if(num > 0) { reverseNum = reverseNum 10 + num % 10; return reverseDigit(num/10); } else return reverseNum; } 2nd Recursion method (Toggle Plain Text) public static int reverseDigit(int num) { int reverseNum = 0; if(num < 0) { return reverseNum; } else{ reverseNum = reverseNum 10 + num % 10; return reverseDigit(num/10); } } public static int reverseDigit(int num) { int reverseNum = 0; if(num < 0) { return reverseNum; } else{ reverseNum = reverseNum 10 + num % 10; return reverseDigit(num/10); } } Thank you for your help in advance. __________________ -- pr0gm3r

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Programming Forums > Application Development > Java

Debug recursion method()