Compilare: main.cpp: In function 'int len(int, char)': main.cpp:8:8: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 8 | if(poz >= C.size()) | ~~~~^~~~~~~~~~~ main.cpp:14:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 14 | if(poz + 4 >= C.size()) | ~~~~~~~~^~~~~~~~~~~ main.cpp:21:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | if(poz + 1 >= C.size()) | ~~~~~~~~^~~~~~~~~~~ main.cpp:28:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 28 | if(poz + 2 >= C.size()) | ~~~~~~~~^~~~~~~~~~~ main.cpp:37:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 37 | if(poz + 1 >= C.size()) | ~~~~~~~~^~~~~~~~~~~ main.cpp:40:6: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | if(k >= C.size()) | ~~^~~~~~~~~~~ main.cpp:46:1: warning: control reaches end of non-void function [-Wreturn-type] 46 | } | ^