Compilare: main.cpp: In function 'bool solveNotFactor()': main.cpp:95:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 95 | while(last < s.size() && s[last] == '!'){ | ~~~~~^~~~~~~~~~ main.cpp: In function 'bool solveAndFactor()': main.cpp:107:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 107 | while(last < s.size() && s[last] == '&'){ | ~~~~~^~~~~~~~~~ main.cpp: In function 'bool solveOrFactor()': main.cpp:115:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 115 | while(last < s.size() && s[last] == '|'){ | ~~~~~^~~~~~~~~~ main.cpp: In function 'bool findDigit()': main.cpp:92:1: warning: control reaches end of non-void function [-Wreturn-type] 92 | } | ^