multithreading - Is this way of generating random numbers safe and valid? -

i doing recreational low-level programming other day, , somewhere in code thing emerged (using pseudocode):

cointoss program

char out = '0';  void thread(){ out = '1';}  int main(){    // creates thread run function provided    // main() not wait thread finish    runinownthread(thread);     printr("%d", out);    return 0; } 

now in our shell run cointoss program x number of times , end this:

0011011100001000

which can convert decimal , random number

my question not whether efficient way of creating random number more can tell if end result random enough use

no, using race condition not way generate random numbers. result nondeterministic, result heavily weighted towards 1 outcome.

if don't care values being heavily weighted (that random enough you), go ahead.