Toggle between three boolean variables in C++ - c++

Question

I'm tying to make 3 state toggle for my lighting in OpenGL using C++. So the way I want to do it is when LIGHT0 is enabled LIGHT1 and LIGHT2 are disabled. When LIGHT1 is enabled LIGHT0 and LIGHT2 are disabled etc.
I know I can easily toggle between two variables like this:
bool light_0 = true, light_1 = false;
if (key press) {
light_0 = !light_0;
light_1 = !light_1;
}
And if I use it for three variables then I'll end up switching one light on and switching two lights off.

Answer 1

Use a state machine.
You need an enum like suggested:
enum Light{
LIGHT_0, LIGHT_1, LIGHT_2
}
Create an instance of Light to keep track of states.
Light lightState = new Light();
Whenever you are using your lights you can switch to the current state:
useLight(){
switch(lightState){
case LIGHT_0:
//do whatever you want
break;
case LIGHT_1:
//do whatever you want
break;
// and so on, customized for your need
}
}
Whenever you want to change light just assing the desired light state to lightState.
if(keyPress){
lightState = LIGHT_1;
}
I hope it's understandable now. (It's not a proper c++ syntax)