How do I restrict a float value to only two places after the decimal point in C?

Question

How can I round a float value (such as 37.777779) to two decimal places (37.78) in C?

Answer 1

Also, if you're using C++, you can just create a function like this:

string prd(const double x, const int decDigits) {
    stringstream ss;
    ss << fixed;
    ss.precision(decDigits); // set # places after decimal
    ss << x;
    return ss.str();
}

You can then output any double myDouble with n places after the decimal point with code such as this:

std::cout << prd(myDouble,n);