lab5

#include <iostream>
#include <iomanip>
#include <string>

bool compare(double number)
{
    return std::to_string(number)[0] == '9';
}

size_t count(double *array, size_t size, bool (*functor)(double))
{
    size_t result = 0;
    for (size_t i=0;i<size;i++){
        if (functor(array[i]))
            result++;
    }
    return result;
}

int main(int argc, char *argv[])
{
    if (argc < 2) {
        std::cout << "Wrong amount of arguments" << std::endl;
        return 0;
    }
    // First argv element - path to programm
    size_t arraySize = atoi(argv[1]);
    auto array = new double[arraySize];
    for (int i= 0;i<arraySize;i++){
        array[i] = (rand() % 1000) / 100.;
        std::cout << "Element " << std::setw(3) << i << ": " << std::setw(10) << array[i] << std::endl;
    }

    std::cout << "Result: " << count(array, arraySize, compare) << std::endl;
    return 0;
}