9.3.15

#include <iostream>
#include <string>
#include <fstream>
#include <float.h>

// 9.15
int main() {
    const std::string filename = "the9_15.txt";

    int n = 0, i = 0;
    double temp = 0.0f;


    std::cout << "Enter N: ";
    while (n <= 0)
        std::cin >> n;

    std::ofstream out(filename, std::ios::binary | std::ios::trunc);
    for (i = 0; i < n; i++) {
        std::cin >> temp;
        out.write(reinterpret_cast<const char*>(&temp), sizeof temp);
    }
    out.close();

    double max = -DBL_MAX;

    std::ifstream in(filename, std::ios::binary);
    for (i = 1; in; i++) {
        in.read(reinterpret_cast<char*>(&temp), sizeof temp);

        if ((i & 1) && temp > max)
            max = temp;
    }
    in.close();

    std::cout << "Result: " << max;

    return 0;
}