Remove printfs

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

Signed-off-by: Gustavo Toshi Komura <gtk10@c3sl.ufpr.br>
Correct error phases when don´t find symbols on symbols table

Signed-off-by: Gustavo Toshi Komura <gtk10@c3sl.ufpr.br>
Include error message when delcare var

Check if var already exist, if yes then show error message.

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

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

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