Thread: Number Challenge program...

1. Number Challenge program...

Code:
```#include <fstream.h>
#include <iomanip.h>
#include <iostream.h>

#define UNDEFINED 17

/* Format: Rows, columns, possibilities. */
unsigned short int array[16][16][18];

bool IsPossibility(unsigned short int, unsigned short int, unsigned short int);
void Load();
void CheckPossibility();
void DisplayChallenge();
void Step();

int main()
{
char selection;

Load();
do
{
cout << "? ";
cin >> selection;

switch (selection)
{
case 'r' : Step();
break;
case 'c' : Load();
break;
case 'd' : DisplayChallenge();
break;
case 'p' : CheckPossibility();
}
} while (selection != 'e');

return 0;
}

bool IsPossibility(unsigned short int column, unsigned short int row, unsigned short int test)
{
for (unsigned short int i = 4 * (column / 4); i < 4 * (column / 4) + 4; ++i)
for (unsigned short int j = 4 * (row / 4); j < 4 * (row / 4) + 4; ++j)
if (array[j][i][0] == test)
return false;

if (column == row)
for (unsigned short int k = 0; k <= 15; ++k)
if (array[k][k][0] == test)
return false;
else if (column == 15 - row)
for (unsigned short int k = 0; k <= 15; ++k)
if (array[k][15 - k][0] == test)
return false;

for (unsigned short int l = 0; l <= 16; ++l)
if (array[l][column][0] == test || array[row][l][0] == test)
return false;

return true;
}

void CheckPossibility()
{
char letter;
unsigned short int number;

cin >> letter >> number;
letter -= 'A'; --number;
if (array[number][letter][0] != UNDEFINED)
cout << setw(4) << array[number][letter][0];
else
for (unsigned short int i = 1; i <= 16; ++i)
if (IsPossibility(letter, number, i))
cout << setw(4) << i;
cout << endl;
}

void DisplayChallenge()
{
cout << setw(4) << " ";
for (unsigned short int i = 0; i <= 16; ++i)
{
for (unsigned short int j = 0; j <= 16; ++j)
if (i == 0) cout << setw(4) << char(j + 65);
else if (j == 0) cout << setw(4) << i;
else
if (array[i - 1][j - 1][0] == UNDEFINED) cout << setw(4) << " ";
else cout << setw(4) << array[i - 1][j - 1][0];
cout << endl;
}
}

void Load()
{
ifstream fin("Puzzle.txt");

for (int i = 0; i <= 15; ++i)
for (int j = 0; j <= 15; ++j)
fin >> array[i][j][0];

fin.close();
}

void Step()
{
for (int i = 0; i <= 15; ++i)
for (int j = 0; j <= 15; ++j)
if (array[i][j][0] == UNDEFINED)
{
int numFound = 0;
for (int k = 0; k <= 16; ++k)
if (IsPossibility(j,i,k))
{
array[i][j][k + 1] = 1;
++numFound;
}
if (numFound == 1)
for (int l = 0; l <= 16; l++)
if (array[i][j][l + 1] == 1)
array[i][j][0] = l;
}
}```
Code:
```In 'Puzzle.txt':
17 17 17 13 17 4 12 17 6 17 3 17 17 7 17 16
8 17 17 7 17 16 17 11 17 9 17 17 17 10 4 6
1 5 17 17 7 6 17 17 13 17 12 17 3 9 17 17
17 12 4 17 17 17 15 17 17 17 17 16 1 17 2 14
10 13 3 17 17 1 17 14 9 7 17 17 5 17 17 17
17 4 17 17 5 17 13 17 17 17 17 10 15 17 1 11
2 17 8 1 17 3 17 17 14 17 17 12 17 6 17 13
5 6 16 15 9 11 10 12 2 8 13 1 4 14 3 7
9 17 7 17 6 17 17 13 5 17 11 17 17 4 15 17
17 1 17 17 17 2 17 15 10 17 17 6 17 17 7 9
17 17 11 14 1 17 17 16 12 17 17 8 2 17 17 17
16 17 17 5 17 17 11 17 17 2 15 17 13 17 17 12
17 9 17 17 12 15 17 17 11 16 17 17 17 17 14 17
11 17 17 10 17 17 4 3 15 17 1 17 17 17 8 5
17 17 5 4 2 17 17 6 17 17 17 3 11 16 17 17
3 17 2 17 17 17 8 17 17 5 14 17 7 15 17 1```
The idea is to make a program that will solve for the remaining values (the 17s) with numbers 1 - 16. Each 4x4 square of numbers has each number appearing in it. Each column and row also has all 16 numbers appearing in it. The full diagonals, likewise, have 1-16 taking up all of the room with no repeats.

Any ideas on what I may be doing to screw this up? I have a feeling its something stupid.

2. snip
Code:
```bool IsPossibility(unsigned short int column, unsigned short int row, unsigned short int test)
{
for (unsigned short int i = 4 * (column / 4); i < 4 * (column / 4) + 4; ++i)
for (unsigned short int j = 4 * (row / 4); j < 4 * (row / 4) + 4; ++j)
if (array[j][0] == test)
return false;```
hmmm look at the if statement
array has 3 indexes, not 2

Popular pages Recent additions