Question

Complete the following program

#include<iostream>

#include<iomanip>

#include<fstream>

using namespace std;

int main()

{

// I - Declaring a five by five array

/* II - Read data from data.txt and use them to create

the matrix in the previous step*/   

// III - Count and print the number of even integers in the matrix.

/* IV - Calculate and print the sum of all integers in the columns with

an even index value. Please note the column index begins with zero.*/

/* V - Calculate the number of integers which are smaller than 20.*/

// Display of the matrix in a table format before transposing

// VI - Transpose the matrix

// Display of the matrix in a table format after transposing

return0;

}

//Thanks for the help ?

Answer 1

#include <iostream>
#include <fstream>
#include <iomanip>

using namespace std;

int main() {
   // declaring variables
   int arr[5][5];
   int trans_arr[5][5];
   int data[25];
   int num;
   int k = 0;
   int even = 0;
   int sum_even_col = 0;
   int sum_all_even_col = 0;
   int less_twenty = 0;
   fstream file;


   // opening file 
   file.open("data.txt");


   // reading data into array
   while (file >> num) { 
       data[k] = num;
      k++;
   }


   // storing data into 5x5 array
   k = 0;
   for(int i = 0; i < 5; i++) {
      for(int j = 0; j < 5; j++) {
         arr[i][j] = data[k];
         k++;
      }
   }


   // counting number of even numbers
   for(int i = 0; i < 5; i++) {
      for(int j = 0; j < 5; j++) {
         if(arr[i][j] % 2 == 0) {
            even += 1;
         }
      }
   }
   cout << "Number of even numbers in the array: " << even << "\n" << endl;


   // calculating sum of all even column
   for(int i = 0; i < 5; i += 2) {
      for(int j = 0; j < 5; j++) {
         sum_even_col += arr[i][j];
      }
      sum_all_even_col += sum_even_col;
      cout << "Sum of the column " << i << " is: " << sum_even_col << endl;
   }
   cout << "Sum of all even columns is: " << sum_all_even_col << "\n" << endl;


   // count numbers less than 20
   for(int i = 0; i < 5; i++) {
      for(int j = 0; j < 5; j++) {
         if(arr[i][j] < 20) {
            less_twenty += 1;
         }
      }
   }
   cout << "Number of numbers in the array which are less than 20 are: " << less_twenty << "\n" << endl;


   // display matrix
   cout << setw(15) << "Matrix:" << endl;
   for(int i = 0; i < 5; i++) {
      for(int j = 0; j < 5; j++) {
         if(j == 4) {
            cout << arr[i][j];
            break;
         }
         cout  << arr[i][j] << setw(5);
      }
      cout << endl;
   }

   
   // transpose the matrix
   for(int i = 0; i < 5; i++) {
      for(int j = 0; j < 5; j++) {
         trans_arr[i][j] = arr[j][i];
      }
   }
   

   // display transpose
   cout << setw(20) << "\nTranspose Matrix:" << endl;
   for(int i = 0; i < 5; i++) {
      for(int j = 0; j < 5; j++) {
         if(j == 4) {
            cout << trans_arr[i][j];
            break;
         }
         cout  << trans_arr[i][j] << setw(5);
      }
      cout << endl;
   }
}

FOR HELP PLEASE COMMENT.
THANK YOU.