A test of the pressed button should be performed.

behind it is the calculation ....

`case RadioGroup1.ItemIndex of 0:f:=cos(x); 1:f:=sqr(x); 2:f:=exp(x); end; if f>y then q:=f else q:=y if z>q then q:=z`

....

Produces an error in the string

` ``if f>y then q:=f else q:=y Variable f might not have been initialized`

What is the problem - I can not understand, can someone tell me.

all variables of type `extended`

.

Delphi version 7