Question

So im having trouble creating this function that has to find the integer average of a char array.

This is my array char[]letters = {‘A’, ‘B’ , ‘C’, ‘D’, ‘E’, ‘F’, ‘G’, ‘H’, ‘I’, ‘J’};

Im trying to type cast to find the integer average like A= 32 j= 74. adding the integer value and turning it back in a character but am stuck at the moment.

/********************************************************************************
 This function will calculate the integer average of characters in the array
********************************************************************************/
public static void average( char [] letters )
{
     int total = 0;

     char mean;


     total = total + letters[letters.length];
     mean = (char)total / letters.length;

     System.out.println("The value is " + average( letters) );
}

Answer 1

This is incorrect:

 total = total + letters[letters.length];

This operation adds the value past the end of the array to total, triggering an exception.

You need a loop here:

for (int i = 0 ; i != letters.length ; i++)
    total += letters[i];

You can also use the for–in loop, like this:

for (char ch : letters)
    total += ch;

You are also casting total instead of casting the result of the division:

mean = (char)total / letters.length;

should be replaced with

mean = (char)(total / letters.length); // Note the added parentheses