#include <iostream>
#include <fstream>
#include <cstdio>
#include "time.h"

using namespace std;

int main(){
    srand((unsigned)time(NULL));

    fstream file("in.bin", ios::out | ios::binary), out("out.bin", ios::out | ios::binary);

    if (!file.is_open()){
        cout << "[FILE] Error reading file" << endl;
        return 0;
    } else {
        cout << "[FILE] File successfuly opened" << endl;
    }

    for (int i = 0; i<1010; i++){
        double data = (rand()%1000010*100.0)/10000;
        file.write(reinterpret_cast<char*> (&data), sizeof(double));
    }

    file.close();

    file.open("in.bin", ios::in | ios::binary);

    double* array = new double[1011];
    int size = 0;

    while (!file.eof()){
        double data;
        file.read(reinterpret_cast<char*> (&data), sizeof(double));
        array[size++] = data;
    }

    double ans = -INT_MAX;

    for (int i = 0; i<size; i++){
        if (i % 9 == 0 && i != 0){
            cout << "[LOG] Wrote maximum from previous 10 elements: " << ans * 1.0 << endl;
            out.write(reinterpret_cast<char*> (&ans), sizeof(double));
            ans = -INT_MAX;
        }

        ans = max(ans, array[i]);
    }

    out.close();
    file.close();

    return 0;
}