you are required to write an interactive object oriented pro

Solution

Example: If elements of matrix are:
1 2 3
4 5 6
7 8 9
Output:
Sum of row 1 = 6
Sum of row 2 = 15
...
...
Sum of column 3 = 18

For rows , average =sum/no. of rows

for column, average = sum/no. of column

program:

#include <iostream>

#include <iomanip>

#include <cmath>

using namespace std;

const int numRows = 10;

const int numCols = 10;

int val[numRows][numCols];

int i, j;

double sum = 0, avgR, avgC;

void randNum() // Creates 10x10 array of random nums 0-9

{

    srand(2622); // random seed

    for (i = 0; i < numRows; i++) // Creates random rows

    {

        cout << endl << endl;

        for (j = 0; j < numCols; j++) // Creates random columns

        {

            val[i][j] = rand() % 10;

            cout << setw(6) << val[i][j];

        }

    }

    cout << endl << endl;

}

void randAvg() // finds average of each row and column

{

    for (i = 0; i < numCols; i++)

    {

        sum += val[i][j];

    }

    avgR = sum / numRows;

    cout << \"     \" << avgR << endl;

}

int main() // calls each function

{

    randNum();

    randAvg();

For Finding & Printing Sum Of Diagonal Elements Of Matrix(right main diagonal):

/* Declaration Of Header Files */
# include <iostream.h>
# include <conio.h>

/* Start Of Main Program */
void main()
{
   
       /* Declaration Of Variables */
       int i, j, r = 0, c = 0;
       int a [ 10 ][ 10 ];
       clrscr();

       /* Asking For The Input From User */
       cout << \" Enter Number Of Rows & Columns Of 2D Array [ Matrix ] : \";
       cin >> r >> c ;
      
       // Accepting Values Of 2D Array [ Matrix ]
       cout << \" Enter \" << r * c << \" Values for 2D Array :  \";
       for ( i = 0; i < r; i++ )
       {
                for ( j = 0; j < c; j++ )
                {
                         cin >> a [ i ][ j ];
                }
       }

       // Printing Values Of 2D Array [ Matrix ]
       cout << \" Values Of 2D Array [ Matrix ] Are : \";
       for ( i = 0; i < r; i++ )
       {
                cout << \" \ \";
                for ( j = 0; j < c; j++ )
                {
                         cout << a [ i ][ j ];
                }
       }
/* Source Code For Computing Sum Of Diagonal Elements If & Only If Rows & Columns Are Equal */
sum=0;
if(r==c)
{
   for(i=0; i<r; i++)
   {
      for(j=0; j<c; j++)
      {
         if(i+j==0 || i+j==2 || i+j==4)
         {
            sum=sum+a[i][j];
         }
      }
   }
   /* Printing The Output Onto The Screen/Console */
   cout<<\"\ Sum Of Diagonal Elements Of Array Is : \"<<sum;
}
else
{
   cout<<\" \ Addition Is Not Possible\";
}
getch();
}
/* End Of Main Program */


Output :

Enter Order For Array A : 3 3

Enter 9 Values For Array :
1 2 3 4 5 6 7 8 9

Array A Is :
1 2 3
4 5 6
7 8 9

Sum Of Diagonal Elements Of Array Is : 15