TwoDimArray.java

// skeleton file for 
// class TwoDimArray
// ...practice working with 2D arrays


public class TwoDimArray {

    //postcond: prints each row of 2D integer array a on its own line
    //          uses a FOR loop
    public static void print1( int[][] a ) { 
	// *** YOUR IMPLEMENTATION HERE ***
    }

    //postcond: prints each row of 2D integer array a on its own line
    //          uses a FOREACH loop
    public static void print2( int[][] a ) { 
	// *** YOUR IMPLEMENTATION HERE ***
    }

    //postcond: returns sum of all items in 2D integer array a
    public static int sum1( int[][] a ) { 
	// *** YOUR IMPLEMENTATION HERE ***
    }

    //postcond: returns sum of all items in 2D integer array a
    //          * uses helper fxn sumRow
    public static int sum2( int [][] m ) { 
	// *** YOUR IMPLEMENTATION HERE ***
    }

    //postcond: returns sum of all items on row r of 2D integer array a
    //          uses a FOR loop
    public static int sumRow( int r, int[][] a ) { 
	// *** YOUR IMPLEMENTATION HERE ***
    }

    //postcond: returns sum of all items on row r of 2D integer array a
    //          uses a FOREACH loop
    public static int sumRow2(int r, int[][] m){ 
	// *** YOUR IMPLEMENTATION HERE ***
    }


    public static void main(String [] args) {
	/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	int [][] m1 = new int[4][2];
	int [][] m2 = { {2,4,6}, {3,5,7} };
	int [][] m3 = { {2}, {4,6}, {1,3,5} };
	print1(m1);
	print1(m2);
	print1(m3);
	print2(m1);
	print2(m2);
	print2(m3);
	System.out.print("testing sum1...\n");
	System.out.println("sum m1 : " + sum1(m1));
	System.out.println("sum m2 : " + sum1(m2));
	System.out.println("sum m3 : " + sum1(m3));
	System.out.print("testing sum2...\n");
	System.out.println("sum m1 : " + sum2(m1));
	System.out.println("sum m2 : " + sum2(m2));
	System.out.println("sum m3 : " + sum2(m3));
	~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
    }

}//end class TwoDimArray