/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

/**
 *
 * @author jomalley
 */
public class Util {

    public static void reverse( int[] data, int numData ) {

        for( int k = 0; k < numData / 2; ++k ) {
            int temp = data[k];
            data[k] = data[numData - k - 1];
            data[numData - k - 1] = temp;
            System.out.println( "k = " + k );
            for( int m = 0; m < numData; ++ m )
                System.out.print( data[m] + "  ");
            System.out.println();
        }
    }

    public static int[] countGrades( int [] grades, int numGrades ) {

        int [] counts = new int[5];

        for( int k = 0; k < numGrades; ++ k) {
//            if( grades[k] >= 90 )
//                ++ counts[0];
//            else if( grades[k] >= 80 )
//                ++ counts[1];
//            else if( grades[k] >= 70 )
//                ++ counts[2];
//            else if( grades[k] >= 60 )
//                ++ counts[3];
//            else
//                ++counts[4];
            int x = grades[k] / 10;
            int index;
            switch( x ) {
                case 10: case 9:
                    index = 0;
                    break;
                case 8:
                    index = 1;
                    break;
                case 7:
                    index = 2;
                    break;
                case 6:
                    index = 3;
                    break;
                default:
                    index = 4;
                    break;
            }
            ++ counts[index];
        }
        return counts;
    }

}