Compilare: user.cpp: In function ‘void DisplayPiece(int)’: user.cpp:45:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i=0; i<piesaX[x].size(); i++ ) ^ user.cpp: In function ‘int main()’: user.cpp:72:55: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int k=0; k<piesaX[NrPiese].size(); k++ ) ^ user.cpp:83:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int j=0; j<piesaX[i].size(); j++ ) ^ user.cpp:95:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int j=0; j<piesaX[i].size(); j++ ) ^ user.cpp:105:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int j=0; j<piesaX[i].size(); j++ ) ^