// Write a program to print the row and column indices of each
// cell of an M x N matrix
//
// Example for M = 3, N = 4 print out:
// 11 12 13 14
// 21 22 23 24
// 31 32 33 34
//
// MatrixLabels1 and MatrixLabels2 both solve this problem using
// while loops, but with slightly different loop conditions,
// variable initialization, and location of increment statements.
// MatrixLabels3 solves this problem using for loops; it is most
// closely analogous to MatrixLabels1.

public class MatrixLabels1 {
    
    public static void main(String[] args) {
	
	// how many rows and columns the matrix will have
	int NumRows, NumColumns;
	// current row and column being processed
	int row = 1, column = 1;
	
	// read in the number of rows and columns
	// assume the values read in are positive integers
	TokenReader in = new TokenReader(System.in);
	System.out.println("Enter the number of rows in the matrix: ");
	NumRows = in.readInt();
	System.out.println("Enter the number of columns in the matrix: ");
	NumColumns = in.readInt();
	
	// leave a blank line before the output
	System.out.println();
	
	// iterate over the rows - assumes row starts as 1
	while (row <= NumRows) {
	    column = 1;
	    
	    // iterate over the columns - assumes column starts as 1
	    while (column <= NumColumns) {
		System.out.print(row + (column + " "));
		++column;
	    }
	    
	    System.out.println();
	    ++row;
	} 
	
    }
    
}