Compilare: user.cpp: In function ‘int cm(std::string, std::string)’: user.cpp:16:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < a.length() ; i++) ^ user.cpp: In function ‘int main()’: user.cpp:45:60: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while( !aju.empty() && poz < v[ i ].length() && poz >= 0 ) ^ user.cpp:56:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz + 1 < v[ i ].length() )aju.push_back( v[ i ].at( poz + 1)); ^ user.cpp:62:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if( poz == v[ i ].length() ) ^ user.cpp: In function ‘int cm(std::string, std::string)’: user.cpp:20:1: warning: control reaches end of non-void function [-Wreturn-type] } ^