Round Values

Rounding helpers turn fractional values into nearby whole-number choices.

round_values.cpp

#include <cmath>
#include <iostream>

int main() {
    double raw = ;

    int down = static_cast<int>(std::floor(raw));
    int up = static_cast<int>(std::ceil(raw));
    int nearest = static_cast<int>(std::round(raw));

    std::cout << "raw=" << raw << std::endl;
    std::cout << "down=" << down << std::endl;
    std::cout << "up=" << up << std::endl;
    std::cout << "nearest=" << nearest << std::endl;
    return 0;
}

#include <cmath>
#include <iostream>

int main() {
    double raw = ;

    int down = static_cast<int>(std::floor(raw));
    int up = static_cast<int>(std::ceil(raw));
    int nearest = static_cast<int>(std::round(raw));

    std::cout << "raw=" << raw << std::endl;
    std::cout << "down=" << down << std::endl;
    std::cout << "up=" << up << std::endl;
    std::cout << "nearest=" << nearest << std::endl;
    return 0;
}

#include <cmath>
#include <iostream>

int main() {
    double raw = ;

    int down = static_cast<int>(std::floor(raw));
    int up = static_cast<int>(std::ceil(raw));
    int nearest = static_cast<int>(std::round(raw));

    std::cout << "raw=" << raw << std::endl;
    std::cout << "down=" << down << std::endl;
    std::cout << "up=" << up << std::endl;
    std::cout << "nearest=" << nearest << std::endl;
    return 0;
}

floor `std::floor` moves to the greatest whole number not greater than the value.

ceil `std::ceil` moves to the smallest whole number not less than the value.

round `std::round` moves to the nearest whole number.