Compilare: main.cpp: In function 'int tokenizing()': main.cpp:16:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 16 | for (int i=0; i<s.size(); i++) | ~^~~~~~~~~ main.cpp:28:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 28 | while (j<s.size() && s[j]!=' ' && s[j]!=')' && s[j]!='(') | ~^~~~~~~~~ main.cpp:14:10: warning: unused variable 'cc' [-Wunused-variable] 14 | char cc; | ^~ main.cpp:54:1: warning: no return statement in function returning non-void [-Wreturn-type] 54 | } | ^ main.cpp: In function 'int get_value()': main.cpp:84:24: warning: array subscript has type 'char' [-Wchar-subscripts] 84 | cc=vars[v[i][0]]; | ^ main.cpp: In function 'int solve_and()': main.cpp:94:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 94 | if (i<v.size() && v[i]=="AND") | ~^~~~~~~~~ main.cpp: In function 'int solve_or()': main.cpp:106:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 106 | if (i<v.size() && v[i]=="OR") | ~^~~~~~~~~ main.cpp: In function 'int main()': main.cpp:121:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 121 | for (int i=0; i<s.size(); i++) | ~^~~~~~~~~ main.cpp:123:18: warning: array subscript has type 'char' [-Wchar-subscripts] 123 | vars[s[i]]^=1; | ^