Randomization?

a friend and I are trying to write a game that needs to ask for random inputs but the

random(0, 3)

function gives us the same series every time. my friend thinks we need to get a random seed but we can’t figure out how to!

please help!

Your friend is right.

See:random() - Arduino Reference

Easuy.

Read in the microsec() value, which is the number of usec since the program started, then use the modulo function (%) to bring it down to some reasonable range. If you wait until some user input occurs,
micros()%1000 would give you 1000 different seeds, not likely to be very predictable in advance.

Good Luck.

Thanks! were starting off just as a proof of concept of 3 pins but our second one is far more common and always is the first one. weve been testing it for an hour… heres our code

void askForInput (int player) {
if (timer_1 <= 0)
{
numRandom1 = random(0, 3);
CurrentTask1 = numRandom1;
Amount += 1;
}
}

Using the time between startup and the first button press, in micros, is a good starter but don't use "modulo" there's no need to "reduce" the value to something "reasonable".

After that use other "random" inputs to move the random number generator on - don't give it a new seed.

For example take the time between button presses and call random that number of times, throw away all but the last result to get your next random value.

Mark