ok so im checking a 9x9 soduku game and i need help checking the part where the 3x3 boxes are all cheked. i cant seem to output the errors for the 3x3 box check can someone help me out. i want it to output which box that has the error with the number that is repeated in the box (replace the line that says cout<<"DISPLAY BOX ERROR HERE" <<endl;)

```
#include <iostream>
#include <cstdlib>
#include <fstream>
#include <iomanip>
using namespace std;
void readAPuzzle(int grid[] [9]);
void printGrid(int grid[] [9]);
void ValidPuzzle(int grid[] [9]);
int main()
{
int grid[9][9];
readAPuzzle(grid);
printGrid(grid);
ValidPuzzle(grid);
system("pause");
return 0;
}
void readAPuzzle(int grid[] [9])
{
ifstream in_f;
in_f.open("soduku.txt");
for (int r = 0; r < 9; r++)
for (int c = 0; c < 9; c++)
in_f >> grid[r] [c];
}
//Prints out the puzzle read from file
void printGrid(int grid[] [9])
{
cout<<"Your Puzzle Is Listed Below: "<<endl;
for (int r = 0; r < 9; r++)
{
if ((r)%3 == 0)
cout<<endl<<endl;
for (int c = 0; c < 9; c++)
{
cout << (grid[r] [c]) << " ";
if ((c+1)%3 == 0)
cout<<" ";
}
cout<<endl;
}
cout<<endl;
}
//Check Validity Of Puzzle
void ValidPuzzle(int grid[] [9])
{
int sum = 0;
int nototest = 0;
int count = 0;
int no_to_test;
int box[9][9];
// check rows
cout<<endl;
for(int r=0;r<9;r++)
{
for(int c=0;c<9;c++)
{
no_to_test = c+1;
count=0;
for(int c=0;c<9;c++)
{
if(grid[r][c]==no_to_test)
count++;
}
if(count>1)
cout<<"The Number: "<<no_to_test<< " is duplicated on row: " << r+1<<endl;
}
}
// check columns
for(int c=0;c<9;c++)
for(int r=0;r<9;r++)
{
no_to_test = r+1;
count=0;
for(int r=0;r<9;r++)
{
if(grid[r][c]==no_to_test)
count++;
}
if(count>1)
{
cout <<"The Number: "<<no_to_test<< " is duplicated on column: " << c+1;
cout<<endl;
}
}
//Check BOXES!
for (int r = 0; r < 9; r++) // zeroing out boxes
for (int c = 0; c < 9; c++)
box[r][c] = 0;
for (int r = 0; r < 3; r++)
{
for (int c = 0; c < 3; c++)
{// keep track of each number in the first box, etc.
box[0][grid[r][c]-1]++;
}
for (int c = 3; c < 6; c++)
{
box[1][grid[r][c]-1]++;
}
for (int c = 6; c < 9; c++)
{
box[2][grid[r][c]-1]++;
}
}
for (int r = 3; r < 6; r++)
{
for (int c = 0; c < 3; c++)
{
box[3][grid[r][c]-1]++;
}
for (int c = 3; c < 6; c++)
{
box[4][grid[r][c]-1]++;
}
for (int c = 6; c < 9; c++)
{
box[5][grid[r][c]-1]++;
}
}
for (int r = 6; r < 9; r++)
{
for (int c = 0; c < 3; c++)
{
box[6][grid[r][c]-1]++;
}
for (int c = 3; c < 6; c++)
{
box[7][grid[r][c]-1]++;
}
for (int c = 6; c < 9; c++)
{
box[8][grid[r][c]-1]++;
}
}
for (int r = 0; r < 9;r++)
{
for (int c = 0; c < 9; c++)
{// if a number has a value other than 1 we counted it twice
if (box[r][c] != 1)
cout<<"DISPLAY BOX ERROR HERE" <<endl;
}
cout<<endl;
}
}
```