Compilare: user.cpp: In function ‘void citire()’: user.cpp:47:11: warning: unused variable ‘xf’ [-Wunused-variable] float xf, yf; ^ user.cpp:47:15: warning: unused variable ‘yf’ [-Wunused-variable] float xf, yf; ^ user.cpp: In function ‘void afisare()’: user.cpp:96:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < stiva.size(); i++) ^