Compilare: user.cpp: In function ‘int eval_expr(char*)’: user.cpp:53:17: warning: unused variable ‘c’ [-Wunused-variable] int c=0,nr=0; ^ user.cpp:39:15: warning: unused variable ‘j’ [-Wunused-variable] int lim,i,j; ^ user.cpp: In function ‘int prioritate(char)’: user.cpp:23:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int calculeaza(int, int, char)’: user.cpp:34:1: warning: control reaches end of non-void function [-Wreturn-type] } ^