c++ - how can I get smaller scale in RAND function -

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• c++ random float number generation 14 answers

i use code create random number between 0 , 1.

randnumber = (double)((double)rand() / (double)rand_max); 

this line of code regularly give me numbers 0.650434, 0.302340 , 0.906789 big numbers me. problem need smaller range number these numbers: 0.000200, 0.000100, 0.000400, 0.000600 , on. how can modify line of code result?

do know kind of probability distribution function you're looking for? if still want uniform can divide [0,1) result large number , apply shift it's centered around value want.

if want that's distributed can use inverse transform method. again you'll need center , modify standard deviation. there similar transformations other distributions well