c++ - Avoid global variables in my program -

i have global variables in program , tried avoid them don't know how..

here program: here

is there alternative avoid variables?

and other remark appriciated too

i think have multiple possibilities.

1. create class , put functions , global variables inside (preferred way)
2. if care name conflicts can use unnamed namespaces
3. it global variable used in 1 function, declare static variable inside function (its value kept between calls)