objective c - how do I "roll" for a 25% chance to get YES or NO? -


i'd randomly generate yes or no based on percentage

so want "roll" , have 25% chance hit yes, 75% chance hit no

was hoping point me in right direction on best way this, maybe article or something?

all of other answers seem focus on percentage of yes being 25%, probability of 1/4. if percentage arbitrary integer between 0 , 100?

bool randomboolwithyespercentage(int percentage) {     return arc4random_uniform(100) < percentage; }

call percentage, randomboolwithyespercentage(25).

and if percentage can fractional, 37.6%? need more sophisticated. should suffice:

bool randomboolwithyespercentage(double percentage) {     double r = 100 * (double)arc4random() / ((double)uint32_max + 1);     return r < percentage; }

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