Using std::tr1::normal_distribution in Qt

Question

I would like to generate numbers with normal_distribution in c++11. Using Qt 4.8 MinGW. I have added the next line

QMAKE_CXXFLAGS += -std=c++0x

to my .pro file and then get next errors: 'swprintf::' has not been declared 'vswprintf::' has not been declared

Answer 1

TR1 really should be avoid when using C++11 as it was designed to meet the limitations of the previous standard. (also everything that was considered useful went on and became integrated into the standard.)

Luckily there is a comprehensive random number generation library in C++11 with normal distribution.

See here:

http://en.cppreference.com/w/cpp/numeric/random

#include <random>
:::
std::random_device rd;
std::normal_distribution<double> dist(0,99);
std::mt19937 engine(rd());
double a=dist(engine);

The exact error your getting look as though the particular implementation of TR1 isn't very good anyway. (missing include or missing namespace prefix).