Compilare: user.cpp: In function ‘int main()’: user.cpp:83:16: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] else if(nr_stack.empty()) ^ user.cpp: In function ‘int priority(char)’: user.cpp:28:12: warning: ‘temp’ may be used uninitialized in this function [-Wmaybe-uninitialized] return temp; ^ user.cpp: In function ‘int main()’: user.cpp:43:44: warning: ‘temp’ may be used uninitialized in this function [-Wmaybe-uninitialized] while (!operator_stack.empty() && priority(operator_stack.top()) <= priority(infix[i])) { ^ user.cpp:43:44: warning: ‘temp’ may be used uninitialized in this function [-Wmaybe-uninitialized]