c - "error: subscripted value is neither array nor pointer nor vector", but why? -

i writing tic-tac-toe program , writing function player's turn. passing in tic-tac-toe board (a 3x3 array) in form of pointer, b. problem on last line error in title.

subscripted value neither array nor pointer nor vector: b[playercoordsx][playercoordsy] = "x";

just testing i've tried multiple different = values. both characters , numerical values not fix issue.

here abbreviated code (what hope) relevant bits:

void playerturn(int *b);  ...  int main(void) {     int board[2][2];     int (*b)[2][2];     b = &board;      ...      void playerturn(int *b);      ...  return 0; }  void playerturn(int *b) {     int playercoordsx, playercoordsy;      while ((playercoordsx != 1 || playercoordsx != 2 || playercoordsx != 3) && (playercoordsy != 1 || playercoordsy != 2 || playercoordsy != 3))     {         printf("enter x coordinate use:");         scanf("%i", &playercoordsx);         playercoordsx = playercoordsx - 1;          printf("enter y coordinate use:");         scanf("%i", &playercoordsy);         playercoordsx = playercoordsy - 1;     }      b[playercoordsx][playercoordsy] = "x"; } 

since b pointer int,

b[playercoordsx] 

is integer, cannot subscript b[playercoordsx]. need pointer pointer int:

int **b; 

then can double indirection. or, if have flat array, calculate index instead of using double indices:

b[playercoordsy * numcols + playercoordsx] = "x"; 

if define board do:

int board[3][3]; 

then can change function signature to:

void playerturn(int b[][3])