Compilare: main.cpp: In function 'int main()': main.cpp:11:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < a.size(); i++ ) ~~^~~~~~~~~~ main.cpp:13:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < b.size() && !ok; i++ ) ~~^~~~~~~~~~ main.cpp:17:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < a.size(); i++ ){ ~~^~~~~~~~~~ main.cpp:18:99: warning: array subscript has type 'char' [-Wchar-subscripts] while( poz && f[ a[ i ] - 'a' ] && ( a[ i ] - 'a' ) < v[ poz - 1 ] && f[ v[ poz - 1 ] ] < ff[ v[ poz - 1 ] ] ) ^ main.cpp:18:120: warning: array subscript has type 'char' [-Wchar-subscripts] while( poz && f[ a[ i ] - 'a' ] && ( a[ i ] - 'a' ) < v[ poz - 1 ] && f[ v[ poz - 1 ] ] < ff[ v[ poz - 1 ] ] ) ^ main.cpp:19:33: warning: array subscript has type 'char' [-Wchar-subscripts] ++f[ v[ --poz ] ]; ^