C++ sorting array

                                     int arr[]= {2,3,5,6,1,2,3,6,10,100,200,0,-10};
    int n = sizeof(arr)/sizeof(int);  
    sort(arr,arr+n);

    for(int i: arr)
    {
        cout << i << " ";
    }

                                    #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;
	
}

                                    sort(arr, arr+length); //increase
sort(arr, arr+length, greater<int>()); //decrease 

                                    #include <iostream>
2 #include <array>
3 #include <string>
4 #include <algorithm>
5
6 using namespace std;
7
8 int main(){
9 array<string, 4> colours = {"blue", "black", "red", "green"};
10 for (string colour : colours){
11 cout << colour << ' ';
12 }
13 cout << endl;
14 sort(colours.begin(), colours.end());
15 for (string colour : colours){
16 cout << colour << ' ';
17 }
18 return 0;
19 }
66
20
21 /*
22 Output:
23 blue black red green
24 black blue green red
25 */