incompatible assignment of type char to type char[9]

incompatible assignment of type char to type char[9]

I cant for the life of me figure out why im getting this error message
incompatible types in assignment of char' tochar[9]'
class CabinAssignment {
char room[3][4][9];
public:
CabinAssignment();
void display();
bool available(int floor, int row, int col);
void assignCabin(int floor, int row, int col);
};
CabinAssignment::CabinAssignment() {
for(int i = 0;i<3;i++) {
room[i][0] = 'A';
room[i][1] = 'B';
room[i][2] = 'C';
room[i][3] = 'D';
room[i][4] = 'E';
room[i][5] = 'F';
room[i][6] = 'G';
room[i][7] = 'H';
room[i][8] = 'I';
room[i][9] = 'J';