Compilare: main.cpp: In function 'bool str_match(std::string)': main.cpp:16:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 16 | while(init[i+j]==str[j] && j<str.size()) j++; | ~^~~~~~~~~~~ main.cpp:17:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 17 | if(j==str.size()) return true; | ~^~~~~~~~~~~~