Please help me find out where I am going wrong. Thanks. public class rot13a { pu

Question

Please help me find out where I am going wrong. Thanks.

public class rot13a
{
public static char[] cipher (char x[], int n)
{
    if (n==0){
      if (x[n] >= 'a' && x[n] <= 'm') x[n] += 13;
      else if (x[n] >= 'n' && x[n] <= 'z') x[n] -= 13;
      else if (x[n] >= 'A' && x[n] <= 'M') x[n] += 13;
      else if (x[n] >= 'N' && x[n] <= 'Z') x[n] -= 13;
      return x;
    }

    else{
      if (x[n] >= 'a' && x[n] <= 'm') x[n] += 13;
      else if (x[n] >= 'n' && x[n] <= 'z') x[n] -= 13;
      else if (x[n] >= 'A' && x[n] <= 'M') x[n] += 13;
      else if (x[n] >= 'N' && x[n] <= 'Z') x[n] -= 13;
      return cipher(x,n-1);
    }
}

public static void main (String args[])
{
    char str[]=ITI1120.readCharLine();
    int n=str.length;
    char a[];
    a = cipher(str, n);
    System.out.println(a[0]);
}
}

Explanation / Answer

please rate - thanks

your problem is that n is the length of the string, the indices going from 0 to n-1. you are sending the function n which is too big it should be n-1.

I would have done more on the code but I don't know what it does. and since your read c haracter I changed the array initialization, and I changed it to print the entire array when done

hope this helps

public class rot13a
{
public static char[] cipher (char x[], int n)
{
    if (n==0){
      if (x[n] >= 'a' && x[n] <= 'm') x[n] += 13;
      else if (x[n] >= 'n' && x[n] <= 'z') x[n] -= 13;
      else if (x[n] >= 'A' && x[n] <= 'M') x[n] += 13;
      else if (x[n] >= 'N' && x[n] <= 'Z') x[n] -= 13;
      return x;
    }

    else{
      if (x[n] >= 'a' && x[n] <= 'm') x[n] += 13;
      else if (x[n] >= 'n' && x[n] <= 'z') x[n] -= 13;
      else if (x[n] >= 'A' && x[n] <= 'M') x[n] += 13;
      else if (x[n] >= 'N' && x[n] <= 'Z') x[n] -= 13;
      return cipher(x,n-1);
    }
}

public static void main (String args[])
{
    char str[]={'s','t','r','i','n','g'};
    int n=str.length;
    char a[];
   a = cipher(str, n-1);
    for(int i=0;i<n;i++)
        System.out.print(a[i]);
}
}

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