#include <iostream>

using namespace std;

void displayGrid(char a[][3]) {
    // Row
    for(int row=0;row<3;row++) {
        // Column
        for(int column=0;column<3;column++) {
            cout << a[row][column];
        }
        // Go to the next line.
        cout << endl;
    }
}

void clearGrid(char a[][3]) {
    // Row
    for(int row=0;row<3;row++) {
        // Column
        for(int column=0;column<3;column++) {
            a[row][column]='.';
        }
    }
}

void setGrid(char a[][3]) {
    int row;
    int column;
    char symbol;

    cout << "What symbol do you want to store: ";
    cin >> symbol;

    cout << "Enter in a row from 1 to 3 : ";
    cin >> row;

    cout << "Enter in a column from 1 to 3 : ";
    cin >> column;

    // Adjust values.
    row--;
    column--;

    // Only if valid locations, assign a star.
    if(row>=0 && row<=2 && column>=0 && column<=2) {
        a[row][column]=symbol;
    }
    else cout << "Invalid location!" << endl;

}

int main() {
    char grid[3][3];

    clearGrid(grid);
    //grid[0]={'X','X','X'};
    displayGrid(grid);
    setGrid(grid);
    setGrid(grid);
    displayGrid(grid);

    return 0;

}