Compilare: main.cpp: In function 'int main()': main.cpp:52:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 52 | while (ind < ch.size()) { | ~~~~^~~~~~~~~~~ main.cpp:55:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 55 | while (ind < ch.size() && ch[ind] != ' ') | ~~~~^~~~~~~~~~~