I took a break from max/msp for quite a while and was doing more traditional coding. Now I am back and bashing my head against the wall trying to do something that is so simple in C but can't figure out how to do in max:

What is the equivalent to having a variable that gets reset to zero every time after it has been read?

I want to have three random number generators that are triggered by three different keyboard keys. If any one of these keys is pressed, I want three values to be sent (the other two should be a value of zero) at the same time. If two keys are pressed then there should be two random values and one value of zero.

I bet there is a really simple way to do this and I am doing something the long way!