Prime seieve C++

#include "benchmark.h"
#include <cstddef>
#include <godot_cpp/core/class_db.hpp>
#include <godot_cpp/classes/engine.hpp>
#include <godot_cpp/variant/utility_functions.hpp>

using namespace godot;

void Benchmark::_bind_methods() {
    ClassDB::bind_method(D_METHOD("get_limit"), &Benchmark::get_limit);
    ClassDB::bind_method(D_METHOD("set_limit", "p_limit"), &Benchmark::set_limit);
    ClassDB::bind_method(D_METHOD("how_many_primes" , "p_limit"), &Benchmark::how_many_primes);

    ADD_PROPERTY(PropertyInfo(Variant::INT, "limit"), "set_limit", "get_limit");

}

Benchmark::Benchmark() {
    // Initialize any variables here.
    limit = 25000;

}

Benchmark::~Benchmark() {
    // Add your cleanup here.
}

void Benchmark::_ready() {
    if(Engine::get_singleton()->is_editor_hint()) { return; }

    // how_many_primes(limit);


}

int Benchmark::is_prime(int n) {
    for (int i = 2 ; i <= n/2 ; ++i) {
        if (n % i == 0) { return 0;}
    }
    return 1;
}

int Benchmark::how_many_primes(int p_limit) {
    int numPrimes = 0;
    for (int i = 2; i < p_limit; ++i) {
        numPrimes += is_prime(i) ;
    }
    UtilityFunctions::print(numPrimes);
    return numPrimes;
}

void Benchmark::set_limit(const int p_limit) {
    limit = p_limit;
}

int Benchmark::get_limit() const {
    return limit;
}