I im, as you probably will understand, really new to qt.

Im trying to connec a couple of pushbuttons but cant get it to work.
Lets say I have three buttons, now i them with setCheckabel(true), if I click one of the it shuld be checked but when I click another one the that was checked should uncheck and the new one should be checked.
I have tried a couple of diffrent ways but I mostly get the message that slot doesnt exist.
How do I do this?