Compilare: main.cpp: In function 'int C1(const std::string&, const int&)': main.cpp:19:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 19 | for(i=0; i<s1.length(); i++) | ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:58:17: warning: division by zero [-Wdiv-by-zero] 58 | cout<<10/0; | ~~^~