float random

random_float.cpp

//This will generate a number from 0.0 to 1.0, inclusive.
float r = static_cast <float> (rand()) / static_cast <float> (RAND_MAX);

//This will generate a number from 0.0 to some arbitrary float, X:
float r2 = static_cast <float> (rand()) / (static_cast <float> (RAND_MAX/X));

//This will generate a number from some arbitrary LO to some arbitrary HI:
float r3 = LO + static_cast <float> (rand()) /( static_cast <float> (RAND_MAX/(HI-LO);

// from http://stackoverflow.com/questions/686353/c-random-float-number-generation