Compilare: user.cpp: In function ‘int expresie(int)’: user.cpp:49:29: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] while(grad == 0 && (*p == '+' || *p == '-') || (*p == '*' || *p == '/')) ^ user.cpp: In function ‘int operatie(int, int, char)’: user.cpp:23:1: warning: control reaches end of non-void function [-Wreturn-type] } ^