sort inbuilt function in c 2b 2b

1#include <bits/stdc++.h> 
2using namespace std; 
3
4#define size(arr) sizeof(arr)/sizeof(arr[0]);
5
6
7int main(){
8
9    int a[5] = {5, 2, 6,3 ,5};
10    int n = size(a);
11    sort((a), a + n);
12    for(int i = 0; i < n; i++){
13        cout << a[i];
14    }
15
16
17    return 0;
18
19}
20

1#include <bits/stdc++.h> 
2using namespace std; 
3
4#define size(arr) sizeof(arr)/sizeof(arr[0]);
5
6
7int main(){
8
9    int a[5] = {5, 2, 6,3 ,5};
10    int n = size(a);
11    sort((a), a + n);
12    for(int i = 0; i < n; i++){
13        cout << a[i];
14    }
15
16
17    return 0;
18
19}