Math in C++

              
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#include <iostream>
#include <cmath>

int main()
{
    std::cout << "cos(0) = " << cos(0) << std::endl;
    std::cout << "sin(0) = " << sin(0) << std::endl;
    std::cout << "tanh(pi/4) = " << tan(M_PI/4) << std::endl;
    std::cout << "exp(1) = " << exp(1) << std::endl;
    std::cout << "log(e) = " << log(M_E) << std::endl;
    std::cout << "pow(2, 3) = " << pow(2, 3) << std::endl;
    std::cout << "sqrt(4) = " << sqrt(4) << std::endl;
    std::cout << "cbrt(8) = " << cbrt(8) << std::endl;
    std::cout << "ceil(7.8) = " << ceil(7.8) << std::endl;
    std::cout << "floor(7.8) = " << floor(7.8) << std::endl;
    std::cout << "round(7.8) = " << round(7.8) << std::endl;
}