[C++] gaussian sampling

http://www.cplusplus.com/reference/random/normal_distribution/

http://stackoverflow.com/questions/19944111/creating-a-gaussian-random-generator-with-a-mean-and-standard-deviation

http://stackoverflow.com/questions/2325472/generate-random-numbers-following-a-normal-distribution-in-c-c

https://en.wikipedia.org/wiki/Box%E2%80%93Muller_transform

#include <random> int main() { std::default_random_engine generator; std::normal_distribution<double> distribution(5.0,2.0); int p[10]={}; for (int i=0; i<nrolls; ++i) { double number = distribution(generator); if ((number>=0.0)&&(number<10.0)) ++p[int(number)]; } std::cout << "normal_distribution (5.0,2.0):" << std::endl; for (int i=0; i<10; ++i) { std::cout << i << "-" << (i+1) << ": "; std::cout << std::string(p[i]*nstars/nrolls,'*') << std::endl; } return 0; }

Edit & Run

output:

normal_distribution (5.0,2.0): 0-1: * 1-2: **** 2-3: ********* 3-4: *************** 4-5: ****************** 5-6: ******************* 6-7: *************** 7-8: ******** 8-9: **** 9-10: *

[cf] using the cdf 

sampling from PDF.PDF