Example for sort (made with https://codeeval.dev)

main.cc

#include <algorithm>            // std::sort
#include <iostream>
#include <vector>               // std::vector
using namespace std;

int main()
{
    vector<int> a{3, 8, 1, 5, -8, 33, 4};
    sort( a.begin(), a.end() );
    int const n = a.size();
    for( int i = 0; i < n; ++i ) { cout << a[i] << ' '; }
    cout << '\n';
}