Compilare: main.cpp: In function 'int main()': main.cpp:22:24: 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 i=1; i<sir2.size()-1; ++i){ | ~^~~~~~~~~~~~~~ main.cpp:20:13: warning: unused variable 'start' [-Wunused-variable] 20 | int start, sfarsit, maxim=0; | ^~~~~ main.cpp:20:20: warning: unused variable 'sfarsit' [-Wunused-variable] 20 | int start, sfarsit, maxim=0; | ^~~~~~~ main.cpp:39:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | for(int i = 1; i < sir2.size()-1; i++){ | ~~^~~~~~~~~~~~~~~