Compilare: user.cpp: In function ‘int main()’: user.cpp:62:132: warning: operation on ‘A[first][second]’ may be undefined [-Wsequence-point] else A[x][y] = A[x-1][y] = A[x+1][y] = A[x][y+1] = A[x][y-1] = A[x][y] = A[x-2][y] = A[x+2][y] = A[x][y+2] = A[x][y-2] = -1; ^ user.cpp: In function ‘point Lee()’: user.cpp:52:1: warning: control reaches end of non-void function [-Wreturn-type] } ^