[Kreator]

First of all, you are supposed to put the type when u declare the function:
e.g - blahblah(int a)

second, i think you wonna return (a==5), cuz (a=5) just assignes 5 to a and returns true. and u just do "return ..." instead of "bool return". the program alrdy knows it's bool when u declared the function.

Hope this helps