Multiple conditions for if statement in C / C++ Arrays in C / C++ with examples
In this tutorial, we will learn about the arrays in C / C++ with examples. These are common examples when using arrays in C / C++. Do not skip these examples if you want to use arrays proficiently.
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Top 10 arrays in C / C++ with example
Here, we will give 10 examples of arrays in C / C++. These examples are written in two different languages, C and C++.
Example 1: Import and export elements in an array in C / C++
C++ programming:
#include <iostream>
using namespace std;
int main() {
int n;
do{
cout<<"Enter the size of the array: ";
cin>>n;
if(n <= 0) cout<<"Please enter the size of the array greater than 0 !!!\n";
}while(n <= 0);
int arr[n];
for(int i = 0; i <= n - 1; i++){
cout<<"Enter the element "<<"[" <<i<<"]: ";
cin>>arr[i];
}
cout<<"Elements in array is: ";
for(int i = 0; i <= n - 1; i++){
cout<<arr[i]<<" ";
}
cout<<"\n-------------------------------\n";
cout<<"This program is posted at learnnc.com";
return 0;
}C programming:
#include <stdio.h>
int main(void) {
int n;
do{
printf("Enter the size of the array: ");
scanf("%d", &n);
if(n <= 0) printf("Please enter the size of the array greater than 0 !!!\n");
}while(n <= 0);
int arr[n];
for(int i = 0; i <= n - 1; i++){
printf("Enter the element [%d]: ",i);
scanf("%d", &arr[i]);
}
printf("Elements in array is: ");
for(int i = 0; i <= n - 1; i++){
printf("%d ",arr[i]);
}
printf("\n-------------------------------\n");
printf("This program is posted at learnnc.com");
return 0;
}Output:
Example 2: Displaying even numbers in array in C / C++
C++ programming:
#include <iostream>
using namespace std;
int main() {
int n;
do{
cout<<"Enter the size of the array: ";
cin>>n;
if(n <= 0) cout<<"Please enter the size of the array greater than 0 !!!\n";
}while(n <= 0);
int arr[n];
for(int i = 0; i <= n - 1; i++){
cout<<"Enter the element "<<"[" <<i<<"]: ";
cin>>arr[i];
}
cout<<"Elements in array is: ";
for(int i = 0; i <= n - 1; i++){
cout<<arr[i]<<" ";
}
cout<<"\nEven numbers in array: ";
for(int i=0; i<n; i++){
if(arr[i] % 2 == 0)
cout<<arr[i]<<" ";
}
cout<<"\n-------------------------------\n";
cout<<"This program is posted at learnnc.com";
return 0;
}C programming:
#include <stdio.h>
int main(void) {
int n;
do{
printf("Enter the size of the array: ");
scanf("%d", &n);
if(n <= 0) printf("Please enter the size of the array greater than 0 !!!\n");
}while(n <= 0);
int arr[n];
for(int i = 0; i <= n - 1; i++){
printf("Enter the element [%d]: ",i);
scanf("%d", &arr[i]);
}
printf("Elements in array is: ");
for(int i = 0; i <= n - 1; i++){
printf("%d ",arr[i]);
}
printf("\nEven numbers in array: ");
for(int i=0; i<n; i++){
if(arr[i] % 2 == 0)
printf("%d ",arr[i]);
}
printf("\n-------------------------------\n");
printf("This program is posted at learnnc.com");
return 0;
}Output:
Example 3: Displaying odd numbers in array in C / C++
C++ programming:
#include <iostream>
using namespace std;
int main() {
int n;
do{
cout<<"Enter the size of the array: ";
cin>>n;
if(n <= 0) cout<<"Please enter the size of the array greater than 0 !!!\n";
}while(n <= 0);
int arr[n];
for(int i = 0; i <= n - 1; i++){
cout<<"Enter the element "<<"[" <<i<<"]: ";
cin>>arr[i];
}
cout<<"Elements in array is: ";
for(int i = 0; i <= n - 1; i++){
cout<<arr[i]<<" ";
}
cout<<"\nOdd numbers in array: ";
for(int i=0; i<n; i++){
if(arr[i] % 2 == 1)
cout<<arr[i]<<" ";
}
cout<<"\n-------------------------------\n";
cout<<"This program is posted at learnnc.com";
return 0;
}C programming:
#include <stdio.h>
int main(void) {
int n;
do{
printf("Enter the size of the array: ");
scanf("%d", &n);
if(n <= 0) printf("Please enter the size of the array greater than 0 !!!\n");
}while(n <= 0);
int arr[n];
for(int i = 0; i <= n - 1; i++){
printf("Enter the element [%d]: ",i);
scanf("%d", &arr[i]);
}
printf("Elements in array is: ");
for(int i = 0; i <= n - 1; i++){
printf("%d ",arr[i]);
}
printf("\nOdd numbers in array: ");
for(int i=0; i<n; i++){
if(arr[i] % 2 == 1)
printf("%d ",arr[i]);
}
printf("\n-------------------------------\n");
printf("This program is posted at learnnc.com");
return 0;
}Output:
Example 4: Displaying primes numbers in array in C / C++
C++ programming:
#include <iostream>
using namespace std;
bool isPrimes(int n)
{
if (n < 2){
return false;
}
if (n == 2){
return true;
}
if (n % 2 == 0){
return false;
}
for (int i = 3; i < (n - 1); i += 2){
if (n % i == 0){
return false;
}
}
return true;
}
int main() {
int n;
do{
cout<<"Enter the size of the array: ";
cin>>n;
if(n <= 0) cout<<"Please enter the size of the array greater than 0 !!!\n";
}while(n <= 0);
int arr[n];
for(int i = 0; i <= n - 1; i++){
cout<<"Enter the element "<<"[" <<i<<"]: ";
cin>>arr[i];
}
cout<<"Elements in array is: ";
for(int i = 0; i <= n - 1; i++){
cout<<arr[i]<<" ";
}
cout<<"\nPrimes in array: ";
for(int i=0; i<n; i++){
if(isPrimes(arr[i]))
cout<<arr[i]<<" ";
}
cout<<"\n-------------------------------\n";
cout<<"This program is posted at learnnc.com";
return 0;
}C programming:
#include <stdio.h>
#include <stdbool.h>
bool isPrimes(int n)
{
if (n < 2){
return false;
}
if (n == 2){
return true;
}
if (n % 2 == 0){
return false;
}
for (int i = 3; i < (n - 1); i += 2){
if (n % i == 0){
return false;
}
}
return true;
}
int main(void) {
int n;
do{
printf("Enter the size of the array: ");
scanf("%d", &n);
if(n <= 0) printf("Please enter the size of the array greater than 0 !!!\n");
}while(n <= 0);
int arr[n];
for(int i = 0; i <= n - 1; i++){
printf("Enter the element [%d]: ",i);
scanf("%d", &arr[i]);
}
printf("Elements in array is: ");
for(int i = 0; i <= n - 1; i++){
printf("%d ",arr[i]);
}
printf("\nPrimes in array: ");
for(int i=0; i<n; i++){
if(isPrimes(arr[i]))
printf("%d ",arr[i]);
}
printf("\n-------------------------------\n");
printf("This program is posted at learnnc.com");
return 0;
}Output:
Example 5: Displaying perfect squares numbers in array in C / C++
C++ programming:
#include <iostream>
using namespace std;
bool isPerfectSquare(int n){
int i = 0;
while(i*i <= n){
if(i*i == n){
return true;
}
++i;
}
return false;
}
int main() {
int n;
do{
cout<<"Enter the size of the array: ";
cin>>n;
if(n <= 0) cout<<"Please enter the size of the array greater than 0 !!!\n";
}while(n <= 0);
int arr[n];
for(int i = 0; i <= n - 1; i++){
cout<<"Enter the element "<<"[" <<i<<"]: ";
cin>>arr[i];
}
cout<<"Elements in array is: ";
for(int i = 0; i <= n - 1; i++){
cout<<arr[i]<<" ";
}
cout<<"\nPerfect squares number in array: ";
for(int i=0; i<n; i++){
if(isPerfectSquare(arr[i]))
cout<<arr[i]<<" ";
}
cout<<"\n-------------------------------\n";
cout<<"This program is posted at learnnc.com";
return 0;
}C programming:
#include <stdio.h>
#include <stdbool.h>
bool isPerfectSquare(int n){
int i = 0;
while(i*i <= n){
if(i*i == n){
return true;
}
++i;
}
return false;
}
int main(void) {
int n;
do{
printf("Enter the size of the array: ");
scanf("%d", &n);
if(n <= 0) printf("Please enter the size of the array greater than 0 !!!\n");
}while(n <= 0);
int arr[n];
for(int i = 0; i <= n - 1; i++){
printf("Enter the element [%d]: ",i);
scanf("%d", &arr[i]);
}
printf("Elements in array is: ");
for(int i = 0; i <= n - 1; i++){
printf("%d ",arr[i]);
}
printf("\nPerfect squares number in array: ");
for(int i=0; i<n; i++){
if(isPerfectSquare(arr[i]))
printf("%d ",arr[i]);
}
printf("\n-------------------------------\n");
printf("This program is posted at learnnc.com");
return 0;
}Output:
Example 6: Find the sum of elements in array in C / C++
C++ programming:
#include <iostream>
using namespace std;
int main() {
int n, sum = 0;
do{
cout<<"Enter the size of the array: ";
cin>>n;
if(n <= 0) cout<<"Please enter the size of the array greater than 0 !!!\n";
}while(n <= 0);
int arr[n];
for(int i = 0; i <= n - 1; i++){
cout<<"Enter the element "<<"[" <<i<<"]: ";
cin>>arr[i];
}
cout<<"Elements in array is: ";
for(int i = 0; i <= n - 1; i++){
cout<<arr[i]<<" ";
}
for(int i=0; i<n; i++){
sum += arr[i];
}
cout<<"\nSum of elements in array: "<<sum;
cout<<"\n-------------------------------\n";
cout<<"This program is posted at learnnc.com";
return 0;
}C programming:
#include <stdio.h>
#include <stdbool.h>
int main(void) {
int n, sum = 0;
do{
printf("Enter the size of the array: ");
scanf("%d", &n);
if(n <= 0) printf("Please enter the size of the array greater than 0 !!!\n");
}while(n <= 0);
int arr[n];
for(int i = 0; i <= n - 1; i++){
printf("Enter the element [%d]: ",i);
scanf("%d", &arr[i]);
}
printf("Elements in array is: ");
for(int i = 0; i <= n - 1; i++){
printf("%d ",arr[i]);
}
for(int i=0; i<n; i++){
sum += arr[i];
}
printf("\nSum of elements in array: %d",sum);
printf("\n-------------------------------\n");
printf("This program is posted at learnnc.com");
return 0;
}Output:
Example 7: Find the sum of even elements in array in C / C++
C++ programming:
#include <iostream>
using namespace std;
int main() {
int n, sum = 0;
do{
cout<<"Enter the size of the array: ";
cin>>n;
if(n <= 0) cout<<"Please enter the size of the array greater than 0 !!!\n";
}while(n <= 0);
int arr[n];
for(int i = 0; i <= n - 1; i++){
cout<<"Enter the element "<<"[" <<i<<"]: ";
cin>>arr[i];
}
cout<<"Elements in array is: ";
for(int i = 0; i <= n - 1; i++){
cout<<arr[i]<<" ";
}
for(int i=0; i<n; i++){
if(arr[i] % 2 == 0) sum += arr[i];
}
cout<<"\nSum of even elements in array: "<<sum;
cout<<"\n-------------------------------\n";
cout<<"This program is posted at learnnc.com";
return 0;
}C programming:
#include <stdio.h>
#include <stdbool.h>
int main(void) {
int n, sum = 0;
do{
printf("Enter the size of the array: ");
scanf("%d", &n);
if(n <= 0) printf("Please enter the size of the array greater than 0 !!!\n");
}while(n <= 0);
int arr[n];
for(int i = 0; i <= n - 1; i++){
printf("Enter the element [%d]: ",i);
scanf("%d", &arr[i]);
}
printf("Elements in array is: ");
for(int i = 0; i <= n - 1; i++){
printf("%d ",arr[i]);
}
for(int i=0; i<n; i++){
if(arr[i] % 2 == 0) sum += arr[i];
}
printf("\nSum of even elements in array: %d",sum);
printf("\n-------------------------------\n");
printf("This program is posted at learnnc.com");
return 0;
}Output:
Example 8: Sort array ascending in C / C++
C++ programming:
#include <iostream>
using namespace std;
void sort_numbers_ascending(int number[], int count)
{
int temp, i, j, k;
for (j = 0; j < count; ++j)
{
for (k = j + 1; k < count; ++k)
{
if (number[j] > number[k])
{
temp = number[j];
number[j] = number[k];
number[k] = temp;
}
}
}
cout<<"\nArray after sorting ascending: ";
for (i = 0; i < count; ++i)
cout<< number[i]<< " ";
}
int main() {
int n;
do{
cout<<"Enter the size of the array: ";
cin>>n;
if(n <= 0) cout<<"Please enter the size of the array greater than 0 !!!\n";
}while(n <= 0);
int arr[n];
for(int i = 0; i <= n - 1; i++){
cout<<"Enter the element "<<"[" <<i<<"]: ";
cin>>arr[i];
}
cout<<"Elements in array is: ";
for(int i = 0; i <= n - 1; i++){
cout<<arr[i]<<" ";
}
sort_numbers_ascending(arr, n);
cout<<"\n-------------------------------\n";
cout<<"This program is posted at learnnc.com";
return 0;
}C programming:
#include <stdio.h>
#include <stdbool.h>
void sort_numbers_ascending(int number[], int count)
{
int temp, i, j, k;
for (j = 0; j < count; ++j)
{
for (k = j + 1; k < count; ++k)
{
if (number[j] > number[k])
{
temp = number[j];
number[j] = number[k];
number[k] = temp;
}
}
}
printf("\nArray after sorting ascending: ");
for (i = 0; i < count; ++i)
printf("%d ", number[i]);
}
int main(void) {
int n;
do{
printf("Enter the size of the array: ");
scanf("%d", &n);
if(n <= 0) printf("Please enter the size of the array greater than 0 !!!\n");
}while(n <= 0);
int arr[n];
for(int i = 0; i <= n - 1; i++){
printf("Enter the element [%d]: ",i);
scanf("%d", &arr[i]);
}
printf("Elements in array is: ");
for(int i = 0; i <= n - 1; i++){
printf("%d ",arr[i]);
}
sort_numbers_ascending(arr, n);
printf("\n-------------------------------\n");
printf("This program is posted at learnnc.com");
return 0;
}Output:
Example 9: Sort array descending in C / C++
C++ programming:
#include <iostream>
using namespace std;
void sort_numbers_descending(int number[], int count)
{
int temp, i, j, k;
for (j = 0; j < count; ++j)
{
for (k = j + 1; k < count; ++k)
{
if (number[j] < number[k])
{
temp = number[j];
number[j] = number[k];
number[k] = temp;
}
}
}
cout<<"\nArray after sorting descending: ";
for (i = 0; i < count; ++i)
cout<< number[i]<< " ";
}
int main() {
int n;
do{
cout<<"Enter the size of the array: ";
cin>>n;
if(n <= 0) cout<<"Please enter the size of the array greater than 0 !!!\n";
}while(n <= 0);
int arr[n];
for(int i = 0; i <= n - 1; i++){
cout<<"Enter the element "<<"[" <<i<<"]: ";
cin>>arr[i];
}
cout<<"Elements in array is: ";
for(int i = 0; i <= n - 1; i++){
cout<<arr[i]<<" ";
}
sort_numbers_descending(arr, n);
cout<<"\n-------------------------------\n";
cout<<"This program is posted at learnnc.com";
return 0;
}C programming:
#include <stdio.h>
#include <stdbool.h>
void sort_numbers_descending(int number[], int count)
{
int temp, i, j, k;
for (j = 0; j < count; ++j)
{
for (k = j + 1; k < count; ++k)
{
if (number[j] < number[k])
{
temp = number[j];
number[j] = number[k];
number[k] = temp;
}
}
}
printf("\nArray after sorting descending: ");
for (i = 0; i < count; ++i)
printf("%d ", number[i]);
}
int main(void) {
int n;
do{
printf("Enter the size of the array: ");
scanf("%d", &n);
if(n <= 0) printf("Please enter the size of the array greater than 0 !!!\n");
}while(n <= 0);
int arr[n];
for(int i = 0; i <= n - 1; i++){
printf("Enter the element [%d]: ",i);
scanf("%d", &arr[i]);
}
printf("Elements in array is: ");
for(int i = 0; i <= n - 1; i++){
printf("%d ",arr[i]);
}
sort_numbers_descending(arr, n);
printf("\n-------------------------------\n");
printf("This program is posted at learnnc.com");
return 0;
}Output:
Example 10: Searching for an element in array in C / C++
C++ programming:
#include <iostream>
using namespace std;
void show_array(int array[], int length){
for(short i = 0; i < length; i++) cout << array[i] <<' ';
cout << endl;
}
void find_element_index(const int* array, size_t size, int x){
int result[100], count = 0;
for (size_t i = 0; i < size - 1; ++i) {
if (array[i] == x) {
result[count] = i;
++count;
}
}
cout << "Element "<< x <<" appear in position: ";
show_array(result, count);
}
int main() {
int n, x;
do{
cout<<"Enter the size of the array: ";
cin>>n;
if(n <= 0) cout<<"Please enter the size of the array greater than 0 !!!\n";
}while(n <= 0);
int arr[n];
for(int i = 0; i <= n - 1; i++){
cout<<"Enter the element "<<"[" <<i<<"]: ";
cin>>arr[i];
}
cout<<"Elements in array is: ";
for(int i = 0; i <= n - 1; i++){
cout<<arr[i]<<" ";
}
cout<<"\nEnter the search element: ";
cin>>x;
find_element_index(arr,n,x);
cout<<"\n-------------------------------\n";
cout<<"This program is posted at learnnc.com";
return 0;
}C programming:
#include <stdio.h>
#include <stdbool.h>
void show_array(int array[], int length){
for(short i = 0; i < length; i++) printf("%d ",array[i]);
printf("\n");
}
void find_element_index(const int* array, size_t size, int x){
int result[100], count = 0;
for (size_t i = 0; i < size - 1; ++i) {
if (array[i] == x) {
result[count] = i;
++count;
}
}
printf("Element %d appear in position: ",x);
show_array(result, count);
}
int main(void) {
int n, x;
do{
printf("Enter the size of the array: ");
scanf("%d", &n);
if(n <= 0) printf("Please enter the size of the array greater than 0 !!!\n");
}while(n <= 0);
int arr[n];
for(int i = 0; i <= n - 1; i++){
printf("Enter the element [%d]: ",i);
scanf("%d", &arr[i]);
}
printf("Elements in array is: ");
for(int i = 0; i <= n - 1; i++){
printf("%d ",arr[i]);
}
printf("\nEnter the search element: ");
scanf("%d", &x);;
find_element_index(arr,n,x);
printf("\n-------------------------------\n");
printf("This program is posted at learnnc.com");
return 0;
}Output:
