// COBOL Programmers Swing With Java - copyright 2005 Doke, Hardgrave, & Johnson
// Chapter 8 - Arrays
// Program to demonstrate two dimensional array access
// TwoDimArrayDemo.java 1 JAN 05

public class TwoDimArrayDemo
{
    public static void main (String args[])
    {
	// CNB wants to track number of loans made each month by type of loan
	// row is type (auto, boat, home; column is month
	// declare & populate loan array & loop counter
	int numberOfLoans [] []=
	{
	{12,23,20,21,15,12,5,9,40,20,12,26},	// auto loans in row 1
	{13,10,15,25,35,41,2,16,11,1,19,31},	// boat loans in row 2
	{14,11,10,19,22,40,7,30,16,6,15,25}	// home loans in row 3
	};
	String monthNames [] ={"Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"};
	int monthNumber;
	int typeOfLoan;
	int numberOfLoansThisMonth;

        // print number of boat loans - row 2
	monthNumber = 0;
	System.out.println ("CNB Boat Loans");
	System.out.println ("Month   Number");
	while (monthNumber < 12)  // loop 12 times
	{
	    System.out.println (monthNames [monthNumber] + "      " + numberOfLoans [1] [monthNumber]);
	    monthNumber= monthNumber + 1;
	}  // end of loop to print boat loans

	// print the sum of each column (total loans for each month)
	monthNumber = 0;
	typeOfLoan = 0;
	System.out.println ("CNB Total Loans");
	System.out.println ("Month   Number");
	while (monthNumber < 12)  // loop 12 times for 12 months
	{
	    numberOfLoansThisMonth = 0;
	    typeOfLoan = 0;
	    while (typeOfLoan < 3)  // loop 3 times to sum this column
	    {
		numberOfLoansThisMonth = numberOfLoansThisMonth + numberOfLoans [typeOfLoan] [monthNumber];
		typeOfLoan = typeOfLoan + 1;
	    }  // end of row loop
	    System.out.println (monthNames [monthNumber] + "      " + numberOfLoansThisMonth);
	    monthNumber= monthNumber + 1;
	}  // end of month loop
    }  // end of main method
}  // end of TwoDimArrayDemo.java