Compilare: main.cpp: In function 'bool full_of_one(std::string)': main.cpp:13:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 13 | for(int indice = 0; indice < s.size(); indice++) | ~~~~~~~^~~~~~~~~~ main.cpp: In function 'void clear_string(std::string&)': main.cpp:22:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 22 | for(int indice = 0; indice < s.size(); indice++) | ~~~~~~~^~~~~~~~~~