Switch: Multiple values in one case?

1 – 8 = -7

9 – 15 = -6

16 – 100 = -84

You have:

case -7:
    ...
    break;
case -6:
    ...
    break;
case -84:
    ...
    break;

Either use:

case 1:
case 2: 
case 3:

etc, or (perhaps more readable) use:

if(age >= 1 && age <= 8) {
     ...
} else if (age >= 9 && age <= 15) {
     ...
} else if (age >= 16 && age <= 100) {
     ...
} else {
     ...
}

etc