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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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] « ' ';
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}
cout << endl;
}
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A} int main()
{
int** array;
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int row, col, i, j;
cout <« "Enter the number of rows" « endl;
cin >> row;
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cout <« "Enter the number of columns" <« endl;
cin >> col;
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//Dynamically allocating row space in heap
array = new int* [row];
//Dynamically allocating column space in heap
for (i = 0; i < row; i++) {
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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];
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numbers \n";
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<«j + 1 <« " column" << endl;
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}//Displaying array
cout <« "Matrix is: \n";
display(array, row, col);
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//Free space after the use of array
delete[] array;
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| }
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Transcribed Image Text:#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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