Compilare: main.cpp: In function 'std::string infixToPostfix()': main.cpp:33:14: warning: unused variable 'tmp' [-Wunused-variable] 33 | char ch, tmp; | ^~~ main.cpp: In function 'int compute(std::string)': main.cpp:106:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 106 | for (int i = 0; i < s.size(); i++) | ~~^~~~~~~~~~ main.cpp:103:9: warning: unused variable 'number' [-Wunused-variable] 103 | int number = 0, i = 0, first, second; | ^~~~~~ main.cpp:103:21: warning: unused variable 'i' [-Wunused-variable] 103 | int number = 0, i = 0, first, second; | ^