C++ examples for boost:Number
Converting from double to int
#include <iostream> #include "boost/numeric/conversion/converter.hpp" using namespace std; using namespace boost; using namespace boost::numeric; int main() { // Create the converter. typedef converter<int, double> Double2Int; // Define the variables for the example. double MyDouble = 2.1; int MyInt = Double2Int::convert(MyDouble); // Display the results. cout << "The double value is: " << MyDouble << endl; cout << "The int value is: " << MyInt << endl; // See what happens with a larger value. MyDouble = 3.8; MyInt = Double2Int::convert(MyDouble); cout << "The double value is: " << MyDouble << endl; cout << "The int value is: " << MyInt << endl; // We don't want truncation, so lets round. typedef conversion_traits<int, double> Traits; typedef converter<int, double, Traits, def_overflow_handler, RoundEven<double> > Double2Rounded; MyInt = Double2Rounded::convert(MyDouble); cout << "The int value is: " << MyInt << endl; return 0; }