Tic Tac Toe WIP

#include <iostream>
#include <limits>

char gameboard[3][3] = {{'7','8','9'},
    {'4','5','6'},
    {'1','2','3'}};
char playerSymbols[] = {'X','O'};
void drawboard();
void processPlayerMove(int);
int getCoord();
int xFromCoord(int coord);
int yFromCoord(int coord);
int main(){
    std::cout << "***TIC TAC TOE***" << std::endl;
    drawboard();
    for (int i = 0; i < 10; i++){
        processPlayerMove(0);
        drawboard();
    }
}

void drawboard(){
    for (int i = 0; i < 3; ++i){
        for (int k = 0; k < 3; ++k){
            std::cout << " " << gameboard[i][k];
            if (k < 2){
                std::cout << " |";
            }
        }
        std::cout << std::endl;
        if (i < 2){
            std::cout << "---+---+---" << std::endl;
        }
    }
}

void processPlayerMove(int playerNumber){
    std::cout << "Player " << playerNumber+1 << " choose where to place \'" <<
        playerSymbols[playerNumber] << "\'" << std::endl;
    int targetCoord = getCoord();
    while (gameboard[yFromCoord(targetCoord)][xFromCoord(targetCoord)] != (targetCoord+'0')){
        std::cout << "expected " << targetCoord << " found " <<
        gameboard[yFromCoord(targetCoord)][xFromCoord(targetCoord)] << std::endl;
        std::cout << "That spot is occupied. Please choose another spot." << std::endl;
        targetCoord = getCoord();
    }
    gameboard[yFromCoord(targetCoord)][xFromCoord(targetCoord)] =playerSymbols[playerNumber];
}

int getCoord(){
    char userIn;
    do {
        std::cin >> userIn;
    }while (userIn < '0' || userIn > '9');
    std::cin.clear();
    std::cin.ignore(std::numeric_limits<std::streamsize>::max(),'\n');
    return userIn-'0';
}

int yFromCoord(int coord){
    int zeroedCoord = coord-1;
    zeroedCoord = 8-zeroedCoord;
    return zeroedCoord/3;
}

int xFromCoord(int coord){
    int zeroedCoord = coord-1;
    return zeroedCoord%3;
}