Explain what line 20 is doingExplain what line 22-24 is doing #include 2using namespace std;//Function to display the arrayE void display (int** a, int r, int c) {for (int i = 0; i < r; i++) {for (int j = 0; j < c; j++) {cout <« a[i][j] « ' ';345}cout << endl;}891011A} int main(){int** array;121314int row, col, i, j;cout <« "Enter the number of rows" « endl;cin >> row;1516cout <« "Enter the number of columns" <« endl;cin >> col;171819//Dynamically allocating row space in heaparray = new int* [row];//Dynamically allocating column space in heapfor (i = 0; i < row; i++) {202122array[i] = new int[col];}//Taking input in the arraycout <« "Enter " << (row * col) <«for (i = 0; i < row; i++) {for (j = 0; j < col; j++) {cout << "Enter element at " << i + 1 << " rowcin >> array [i][j];23242526numbers \n";272829<«j + 1 <« " column" << endl;303132}//Displaying arraycout <« "Matrix is: \n";display(array, row, col);333435//Free space after the use of arraydelete[] array;3637| }38

A dynamic array, also known as a growable array, resizable array, dynamic table, changeable array,…

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Explain what line 20 is doing Explain what line 22-24 is doing

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

Explain what line 20 is doing Explain what line 22-24 is doing

#include <iostream>
2
using namespace std;
//Function to display the array
E void display (int** a, int r, int c) {
for (int i = 0; i < r; i++) {
for (int j = 0; j < c; j++) {
cout <« a[i][j] « ' ';
3
4
5
}
cout << endl;
}
8
9
10
11
A} int main()
{
int** array;
12
13
14
int row, col, i, j;
cout <« "Enter the number of rows" « endl;
cin >> row;
15
16
cout <« "Enter the number of columns" <« endl;
cin >> col;
17
18
19
//Dynamically allocating row space in heap
array = new int* [row];
//Dynamically allocating column space in heap
for (i = 0; i < row; i++) {
20
21
22
array[i] = new int[col];
}
//Taking input in the array
cout <« "Enter " << (row * col) <«
for (i = 0; i < row; i++) {
for (j = 0; j < col; j++) {
cout << "Enter element at " << i + 1 << " row
cin >> array [i][j];
23
24
25
26
numbers \n";
27
28
29
<«j + 1 <« " column" << endl;
30
31
32
}//Displaying array
cout <« "Matrix is: \n";
display(array, row, col);
33
34
35
//Free space after the use of array
delete[] array;
36
37
| }
38

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