example4_precision_float_types.cpp

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#include <iostream>
#include <limits>
#include <iomanip>

template<typename T>
void print_float_info() {
    std::cout << "Type: " << typeid(T).name() << std::endl;
    std::cout << "Digits10: " << std::numeric_limits<T>::digits10 << std::endl;
    std::cout << "Max exponent: " << std::numeric_limits<T>::max_exponent10 << std::endl;
    std::cout << "Epsilon: " << std::numeric_limits<T>::epsilon() << std::endl;
    std::cout << "Round error: " << std::numeric_limits<T>::round_error() << std::endl;
    std::cout << std::endl;
}

int main() {
    std::cout << std::setprecision(std::numeric_limits<long double>::digits10 + 1);

    std::cout << "Float info:" << std::endl;
    print_float_info<float>();

    std::cout << "Double info:" << std::endl;
    print_float_info<double>();

    std::cout << "Long double info:" << std::endl;
    print_float_info<long double>();

    return 0;
}