System modeling (c++)

#include <iostream>
#include <string>
#include <vector>
#include <numeric>
#include <ctime>

using namespace std;

void init(int* a, int val) {
    int i = 5;
    while (i > -1) {
        a[i] = val % 10;
        val /= 10;
        --i;
    }
}

int check(int* a) {
    return a[0]+a[1]+a[2] == 10 && a[3]+a[4]+a[5] == 10;
}

int main() {
    int* a = new int[6];
    int res = 0;
    time_t t = clock();
    for (int i = 0; i < 10e6; ++i) {
        init(a, i);
        res += check(a);
    }
    printf("time: %f\nres: %d", (clock() - t) / CLOCKS_PER_SEC, res);
}