import java.util.Scanner;

public class Two_D_array_CMPS280_2016 {

	// Initialize the array
	double iDoc[][] = {
			{1,2,3,4},
			{5,6,7,8},
			{9,10,11,12},
			{13,14,15,16}
	};

	public static void main(String[] args) {
		Two_D_array_CMPS280_2016 array = new Two_D_array_CMPS280_2016();
		Scanner sc = new Scanner(System.in);
		int input = 0;

		System.out.println("Total of all elements: " + array.Total_2DArray_Elements());
		System.out.println("Average: " + array.Average_2DArray_Elements());

		System.out.println("Enter row: ");
		input = sc.nextInt();
		System.out.println("Total of elements on row: " + array.Total_2DArray_Elements_by_Certain_RowNo(input));

		System.out.println("Enter column: ");
		input = sc.nextInt();
		System.out.println("Total of elements in column: " + array.Total_2DArray_Elements_by_CertainColumnNo((input)));

		System.out.println("Enter row: ");
		input = sc.nextInt();
		System.out.println("Largest value in row: " + array.The_Largest_Value_In_Certain_RowNo(input));

		System.out.println("Enter column: ");
		input = sc.nextInt();
		System.out.println("Largest value in col: " + array.The_Largest_Value_In_Certain_ColumnNo((input)));
	}


	// Total all elements in the array
	double Total_2DArray_Elements() {
		double sum = 0.0;

		for (int i = 0; i < iDoc.length; ++i) {
			for (int j = 0; j < iDoc[i].length; ++j) {
				sum += iDoc[i][j];
			}
		}

		return sum;
	}

	// Return the average of all elements in the array
	double Average_2DArray_Elements() {
		int count = iDoc.length * iDoc[0].length; // assuming each row is of equal length
		double sum = Total_2DArray_Elements();

		return sum / count;
	}


	// Return the total of all of the elements in the given row
	double Total_2DArray_Elements_by_Certain_RowNo(int row) {
		double sum = 0.0;

		for (int i = 0; i < iDoc[row].length; ++i) {
			sum += iDoc[row][i];
		}

		return sum;
	}

	// Return the total of all of the elements in the given column
	double Total_2DArray_Elements_by_CertainColumnNo(int col) {
		double sum = 0.0;

		for (int i = 0; i < iDoc.length; ++i) {
			sum += iDoc[i][col];
		}

		return sum;
	}

	// Return the largest value in the given row
	double The_Largest_Value_In_Certain_RowNo(int row) {
		double max = iDoc[row][0];

		for (int i = 0; i < iDoc[row].length; ++i) {
			if (iDoc[row][i] > max) max = iDoc[row][i];
		}

		return max;
	}

	// Return the largest value in the given column
	double The_Largest_Value_In_Certain_ColumnNo(int col) {
		double max = iDoc[0][col];

		for (int i = 0; i < iDoc.length; ++i) {
			if (iDoc[i][col] > max) max = iDoc[i][col];
		}

		return max;
	}
}