Change way to do repetition in header

Add struct stack.
Change var "rotulo"s.

Signed-off-by: Gustavo Toshi Komura <gtk10@c3sl.ufpr.br>
Include function to work with stack

Add function "inicia_pilha" to start stack.
Add function "empilha_Rotulo" to put one "rotulo" on stack.
Add function "desempilha_Rotulo" to get out "rotulo" of the stack.

Signed-off-by: Gustavo Toshi Komura <gtk10@c3sl.ufpr.br>
Change way to work with repetition

Repetition work with stack.

Signed-off-by: Gustavo Toshi Komura <gtk10@c3sl.ufpr.br>
Execute make

Signed-off-by: Gustavo Toshi Komura <gtk10@c3sl.ufpr.br>