tic tac toe no compiler errors

// ConsoleApplication3.cpp : Defines the entry point for the console application.
//
#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
int setUpBoard(char *board);
int printBoard(char board[]);
int playerMove(char *board, char player);
char checkForWin(char board[]);
struct vector getCoord();

struct vector
{
    int x;
    int y;
};

int main(void)
{
    printf("Welcome to tic tac toe!");
    char board[9];
    setUpBoard(&(board[0]));
    while (checkForWin(board) == '-'){
        playerMove(&(board[0]), 'X');
        if (checkForWin(board) == '-') {
            playerMove(&(board[0]), 'O');
        }
    }
    return 0;
}

int setUpBoard(char *board) {
    for (int i = 0; i < 3; i++) {
        for (int n = 0; n < 3; i++) {
            *(board+i*3+n) = '-';
        }
    }
    return 0;
}
int printBoard(char board[]) {
    for (int i = 0; i < 3; i++) {
        printf("\n");
        for (int n = 0; n < 3; n++) {
            printf("%c" , board[i*3+n]);
            printf("|");
        }
    }
    return 0;
}
int playerMove(char *board, char player) {
    struct vector coord;
    do {
        coord = getCoord();
    } while (*(board + coord.x * 3 + coord.y) != '-');
    *(board+coord.x*3 + coord.y) = player;
    return 0;
}
char checkForWin(char board[]) {
    /*check rows*/
    for (int i = 0; i < 3; i++) {
        if ( board[2 * 3 + i] == board[3 + i] && board[i] == board[3 + i]) {
            return board[i];
        }
    }
    /*check columns*/
    for (int i = 0; i < 3; i++) {
        if ( board[i*3+2] == board[i*3+1] && board[i * 3] == board[i * 3 + 1] ) {
            return board[i*3];
        }
    }
    if (board[0] == board[4] && board[4] == board[9]) {
        return board[4];
    }
    return '-';
}
struct vector getCoord() {
    printf("Please enter the coordinates of where you would like to go:\n");
    printf("0,0|1,0|2,0\n0,1|1,1|2,1\n0,2|1,2|2,2");
    printf("x:");
    struct vector coord;
    scanf("%d", &coord.x);
    printf("/ny:");
    scanf("%d", &coord.y);
    return coord;
}