Compilare: main.cpp: In function 'int inmultire()': main.cpp:38:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | while(poz < s.size() && (s[poz] == '*' || s[poz] == '/')) | ~~~~^~~~~~~~~~ main.cpp: In function 'int adunare()': main.cpp:49:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 49 | while(poz < s.size() && (s[poz] == '+' || s[poz] == '-')) | ~~~~^~~~~~~~~~