How to access an array in a different function - arrays

Question

I am writing a program to solve Sudoku puzzles in C I declared the array in main() when I try and access it in a different function the compiler gives the error I've tried using pointers to the array but nothing seems to allow me to access it
error: ‘grid’ undeclared (first use in this function) 121 |
printf("%d ", &grid[i][i]);
How can I access this array from a different function?
Here is the code
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
int main()
{
int grid[9][9] =
{
{8,0,0,0,0,0,0,0,0},
{0,0,3,6,0,0,0,0,0},
{0,7,0,0,9,0,2,0,0},
{0,5,0,0,0,7,0,0,0},
{0,0,0,0,4,5,7,0,0},
{0,0,0,1,0,0,0,3,0},
{0,0,1,0,0,0,0,6,8},
{0,0,8,5,0,0,0,1,0},
{0,9,0,0,0,0,4,0,0}
};
int LineNum = 9;
int RowAmount = 9;
for (int i = 0; i < LineNum; ++i)
{
for (int i = 0; i < RowAmount; ++i)
{
printf("%d ", &grid[i][i]);
}
printf("\n");
}
}
int find_empty_box(int sudoku)
{
for (int x = 0; x <= 9; ++x)
{
for (int y = 0; y < 9; ++y)
{
if (sudoku[&x][&y] == 0)
{
return x, y;
}
}
return NULL, NULL;
}
}
int Answer_Valid(int sudoku, int guess, int row, int col)
{
int row_values = &sudoku[&row];
for (int i = 0; i < sudoku[&row]; ++i)
{
if (guess == sudoku[&row[&i]])
{
return false;
}
}
int column_values = &sudoku[&col];
for (int t = 0; t <= 9; ++t)
{
for (int n = 0; n < &sudoku[&col]; ++n)
{
if (&guess == &sudoku[&col[&n]])
{
return false;
}
}
}
int row_start = (row / 3) * 3;
int col_start = (col / 3) * 3;
for (int x = 0; x <= row_start && row_start + 3; ++x)
{
for (int y = 0; y < col_start && col_start + 3; ++y)
{
if (sudoku[&x][&y] == guess)
{
return false;
}
return true;
}
}
}
int Solver(sudoku, guess)
{
int row, col = find_empty_box(sudoku);
if (row == NULL)
{
return true;
}
for (int i = 0; i < 1||2||3||4||5||6||7||8||9; ++i)
{
if(Answer_Valid(sudoku, guess, row, col))
{
sudoku[&row][&col] = guess;
if(Solver(sudoku))
{
return true;
}
return false;
}
}
int LineNum = 9;
int RowAmount = 9;
for (int i = 0; i < LineNum; ++i)
{
for (int i = 0; i < RowAmount; ++i)
{
printf("%d ", &grid[i][i]);
}
printf("\n");
}
}