Home » C++ programs » C++ Most popular & searched programs

C++ program to sort an array in Ascending Order

Given an integer array, we have to sort it in an ascending order using C++ program.
[Last updated : February 27, 2023]

Sorting an array in Ascending Order

In this program, we will learn how to sort integer array numbers/elements in Ascending Order in C++?

This program will read total number of elements (N) and check value of N must be valid between 1-N, program will read N integer values (as array elements), print input elements with sorted array element (After sorting elements in Ascending Order).

C++ program to sort an array in Ascending Order

#include <iostream>
using namespace std;

#define MAX 100

int main()
{
    //array declaration
    int arr[MAX];
    int n, i, j;
    int temp;

    //read total number of elements to read
    cout << "Enter total number of elements to read: ";
    cin >> n;

    //check bound
    if (n < 0 || n > MAX) {
        cout << "Input valid range!!!" << endl;
        return -1;
    }

    //read n elements
    for (i = 0; i < n; i++) {
        cout << "Enter element [" << i + 1 << "] ";
        cin >> arr[i];
    }

    //print input elements
    cout << "Unsorted Array elements:" << endl;
    for (i = 0; i < n; i++)
        cout << arr[i] << "\t";
    cout << endl;

    //sorting - ASCENDING ORDER
    for (i = 0; i < n; i++) {
        for (j = i + 1; j < n; j++) {
            if (arr[i] > arr[j]) {
                temp = arr[i];
                arr[i] = arr[j];
                arr[j] = temp;
            }
        }
    }

    //print sorted array elements
    cout << "Sorted (Ascending Order) Array elements:" << endl;
    for (i = 0; i < n; i++)
        cout << arr[i] << "\t";
    cout << endl;

    return 0;
}

Output

First run:
Enter total number of elements to read: 5
Enter element [1] 123
Enter element [2] 345
Enter element [3] 567
Enter element [4] 12
Enter element [5] 90
Unsorted Array elements:
123	345	567	12	90	
Sorted (Ascending Order) Array elements:
12	90	123	345	567	

Second run:
Enter total number of elements to read: 120
Input valid range!!!