Compilare: user.cpp: In function ‘int main()’: user.cpp:21:11: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(!mystk.empty()) ^ user.cpp:12:9: warning: unused variable ‘k’ [-Wunused-variable] int k=0,par_inchisa=0,par_deschisa=0,i,n,pard=0; ^ user.cpp:12:46: warning: unused variable ‘pard’ [-Wunused-variable] int k=0,par_inchisa=0,par_deschisa=0,i,n,pard=0; ^