Array

// declare and initialize and array

int x[6] = {19, 10, 8, 17, 9, 15};

Example 1: Displaying Array Elements

#include <iostream>

using namespace std;

int main() {

int numbers[5] = {7, 5, 6, 12, 35};

cout << "The numbers are: ";

// Printing array elements

// using range based for loop

for (const int &n : numbers) {

cout << n << " ";

}

cout << "\nThe numbers are: ";

// Printing array elements

// using traditional for loop

for (int i = 0; i < 5; ++i) {

cout << numbers[i] << " ";

}

return 0;

}

Example 2: Take Inputs from User and Store Them in an Array:

#include <iostream>

using namespace std;

int main() {

int numbers[5];

cout << "Enter 5 numbers: " << endl;

// store input from user to array

for (int i = 0; i < 5; ++i) {

cin >> numbers[i];

}

cout << "The numbers are: ";

// print array elements

for (int n = 0; n < 5; ++n) {

cout << numbers[n] << " ";

}

return 0;

}

Example 3: Display Sum and Average of Array Elements Using for Loop

#include <iostream>

using namespace std;

int main() {

// initialize an array without specifying size

double numbers[] = {7, 5, 6, 12, 35, 27};

double sum = 0;

double count = 0;

double average;

cout << "The numbers are: ";

// print array elements

// use of range-based for loop

for (const double &n : numbers) {

cout << n << " ";

// calculate the sum

sum += n;

// count the no. of array elements

++count;

}

// print the sum

cout << "\nTheir Sum = " << sum << endl;

// find the average

average = sum / count;

cout << "Their Average = " << average << endl;

return 0;

}

One dimensional array:

Two dimensional array:

Creating array Dynamically:

Multidimensional Arrays

int x[3][4];

int test[2][3] = { {2, 4, 5}, {9, 0, 19}};

Example 1: Two Dimensional Array

// C++ Program to display all elements

// of an initialised two dimensional array

#include <iostream>

using namespace std;

int main() {

int test[3][2] = {{2, -5},

{4, 0},

{9, 1}};

// use of nested for loop

// access rows of the array

for (int i = 0; i < 3; ++i) {

// access columns of the array

for (int j = 0; j < 2; ++j) {

cout << "test[" << i << "][" << j << "] = " << test[i][j] << endl;

}

return 0;

}