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C++ program to sort an array in Descending Order

mahmoud2506
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2022-05-04
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C++ program to sort an array in Descending Order

In this program, we will learn how to sort integer array numbers/elements in Descending 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 Descending Order).

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mahmoud2506
2022-05-04
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Program to sort array elements in Descending Order in C++

#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 - Descending 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 (Descending 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 (Descending Order) Array elements:
567	345	123	90	12	

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

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