Is there any function or method to randomly choose a number (or 2 numbers or more) from an array?
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Is there any function or method to randomly choose a number (or 2 numbers or more) from an array?
Depending on how many numbers you need, the size of the array, and whether the array needs to retain its order, you could use
std::random_shuffleto reorder the array and then just loop from 0..n-1 to get n random numbers. This works better when you want to get a lot of numbers relative to the length of the array.If that doesn’t seem appropriate, you can just use
srand()andrand() % nas an index into the array to get a pretty good approximation of a random selection.