Question

Row and columns sum

Create a java program that:

• Input:
• Receive as input in command line the sizes m and n of a two dimensional array
• Receive as input in command line the minValue and maxValue between which the random numbers will be generated for your two dimensional array
• Generate:
• Generate a two-dimensional with numbers between minValue and maxValue (inclusive) with the given size (m x n)
• Compute:
• Compute the sum for each row and store the results in a new array.
• Compute the sum of sums for rows and store the results in a variable.
• Compute the sum for each column and store the results in a new array.
• Compute the sum of sums for columns and store the results in a variable.
• Print:
• Print the array as a table with the computed sums per rows and columns.
• Print the two sums of sums computed and check and print if they match

Run the program 5 times with representative sizes

Answer 1

Code -

import java.util.*;
public class Main
{
   public static void main(String[] args) {
   //reading from command line arguement , give 4 value in command line arguemnet
   //m for row
   int m = Integer.parseInt(args[0]);
   //n for column
   int n = Integer.parseInt(args[1]);
   //min value
   int minValue = Integer.parseInt(args[2]);
   //max value
   int maxValue = Integer.parseInt(args[3]);
   //create random object
   Random r = new Random();
   //variable and arrays decalare to use
int i, j;
int a[][] = new int[m][n];
int sumRow[] = new int[m];
int sumRows=0;
int sumCol[] = new int[n];
int sumCols=0;
//generate random value and store in array a
for(i = 0;i<m;i++){
for(j = 0;j<n;j++){
a[i][j] =r.nextInt(maxValue-minValue) + minValue;
}   
}
//calculate sum of rows and store in sumRow
for(i = 0;i<m;i++){
for(j = 0;j<n;j++){
sumRow[i] += a[i][j];
}   
}
//calculate sum of sum of rows
for(i = 0;i<m;i++){
sumRows+=sumRow[i];
}

//calculate sum of columns and store in sumCol
for(i = 0;i<m;i++){
for(j = 0;j<n;j++){
sumCol[i] += a[j][i];
}   
}
//calculate sum of cols
for(i = 0;i<m;i++){
sumCols+=sumCol[i];
}
//print the matrix as sum
for(i = 0;i<m;i++){
for(j = 0;j<n;j++){
System.out.printf("%4d ", a[i][j]);
if(j == n-1){
System.out.print(" | "+sumRow[i]);
}
}   
System.out.println();
}
System.out.println("------------------------");
for(i = 0;i<n;i++)
System.out.printf("%4d ",sumCol[i]);
System.out.printf(" |%4d",sumRows);
System.out.println("\n\n");
System.out.println("Sum rows is "+sumRows);
System.out.println("Sum columns is "+sumCols);
   }
}

Screenshots -

13 11 16 10 8 9 13 136 12 1 31 8 1 33 -- -- --- --- --- -- 40 27 33 | 100 Sum rows is 100 Sum columns is 100

14 16 19 15 1 18 3 133 4 1 28 12 1 31 - -- --- -- --- -- --- 24 49 19 192 Sum rows is 92 Sum columns is 92

12 15 14 1 13 7 9 7 1 1 22 1 35 1 22 41 21 17 I 79 Sum rows is 79 Sum columns is 79

8 4 2 16 4 14 12 19 12 1 36 | 27 1 28 - -- --- -- --- --- - -- 14 34 43 91 Sum rows is 91 Sum columns is 91

8 10 2 10 12 11 9 14 1 12 27 36 25 20 33 35 1 88 Sum rows is 88 Sum columns is 88