Compilare: main.cpp: In function 'int main()': main.cpp:20:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | for(int pos = 0; pos < str.size(); pos++){ | ~~~~^~~~~~~~~~~~ main.cpp:24:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | for(int pos2 = pos1 + 1; pos2 < str.size(); pos2++){ | ~~~~~^~~~~~~~~~~~ main.cpp:14:3: warning: 'ant' may be used uninitialized in this function [-Wmaybe-uninitialized] 14 | if(chr != ant){ | ^~