#include <iostream>
using namespace std;
int producth ( int grid[20][20], int row, int col, int& best)
{
int product;
product = grid[row][col]*grid[row][col+1]*grid[row][col+2]*grid[row][col+3];
if (product > best)
best = product;
cout<<grid[row][col]<<" "<<grid[row][col+1]<<" "<<grid[row][col+2]<<" "<<grid[row][col+3]<<" "<<product<<endl;
}
int productv ( int grid[20][20], int row, int col, int& best)
{
int product;
product = grid[row][col]*grid[row+1][col]*grid[row+2][col]*grid[row+3][col];
if (product > best)
best = product;
cout<<grid[row][col]<<" "<<grid[row+1][col]<<" "<<grid[row+2][col]<<" "<<grid[row+3][col]<<" "<<product<<endl;
}
int productd1 ( int grid[20][20], int row, int col, int& best)
{
int product;
product = grid[row][col]*grid[row+1][col+1]*grid[row+2][col+2]*grid[row+3][col+3];
if (product > best)
best = product;
cout<<grid[row][col]<<" "<<grid[row+1][col+1]<<" "<<grid[row+2][col+2]<<" "<<grid[row+3][col+3]<<" "<<product<<endl;
}
int productd2 ( int grid[20][20], int row, int col, int& best)
{
int product;
product = grid[row][col]*grid[row+1][col-1]*grid[row+2][col-2]*grid[row+3][col-3];
if (product > best)
best = product;
cout<<grid[row][col]<<" "<<grid[row+1][col-1]<<" "<<grid[row+2][col-2]<<" "<<grid[row+3][col-3]<<" "<<product<<endl;
}
int main()
{
int answer = 0;
int grid [20] [20] = {{ 8, 02, 22, 97, 38, 15, 00, 40, 00, 75, 04, 05, 07, 78, 52, 12, 50, 77, 91, 8 },
{ 49, 49, 99, 40, 17, 81, 18, 57, 60, 87, 17, 40, 98, 43, 69, 48, 04, 56, 62, 00 },
{ 81, 49, 31, 73, 55, 79, 14, 29, 93, 71, 40, 67, 53, 88, 30, 03, 49, 13, 36, 65 },
{ 52, 70, 95, 23, 04, 60, 11, 42, 69, 24, 68, 56, 01, 32, 56, 71, 37, 02, 36, 91},
{ 22, 31, 16, 71, 51, 67, 63, 89, 41, 92, 36, 54, 22, 40, 40, 28, 66, 33, 13, 80},
{ 24, 47, 32, 60, 99, 03, 45, 02, 44, 75, 33, 53, 78, 36, 84, 20, 35, 17, 12, 50},
{ 32, 98, 81, 28, 64, 23, 67, 10, 26, 38, 40, 67, 59, 54, 70, 66, 18, 38, 64, 70},
{67, 26, 20, 68, 02, 62, 12, 20, 95, 63, 94, 39, 63, 8, 40, 91, 66, 49, 94, 21},
{24, 55, 58, 05, 66, 73, 99, 26, 97, 17, 78, 78, 96, 83, 14, 88, 34, 89, 63, 72},
{21, 36, 23, 9, 75, 00, 76, 44, 20, 45, 35, 14, 00, 61, 33, 97, 34, 31, 33, 95},
{78, 17, 53, 28, 22, 75, 31, 67, 15, 94, 03, 80, 04, 62, 16, 14, 9, 53, 56, 92},
{16, 39, 05, 42, 96, 35, 31, 47, 55, 58, 88, 24, 00, 17, 54, 24, 36, 29, 85, 57},
{86, 56, 00, 48, 35, 71, 89, 07, 05, 44, 44, 37, 44, 60, 21, 58, 51, 54, 17, 58},
{19, 80, 81, 68, 05, 94, 47, 69, 28, 73, 92, 13, 86, 52, 17, 77, 04, 89, 55, 40},
{04, 52, 8, 83, 97, 35, 99, 16, 07, 97, 57, 32, 16, 26, 26, 79, 33, 27, 98, 66},
{88, 36, 68, 87, 57, 62, 20, 72, 03, 46, 33, 67, 46, 55, 12, 32, 63, 93, 53, 69},
{04, 42, 16, 73, 38, 25, 39, 11, 24, 94, 72, 18, 8, 46, 29, 32, 40, 62, 76, 36},
{20, 69, 36, 41, 72, 30, 23, 88, 34, 62, 99, 69, 82, 67, 59, 85, 74, 04, 36, 16},
{20, 73, 35, 29, 78, 31, 90, 01, 74, 31, 49, 71, 48, 86, 81, 16, 23, 57, 05, 54},
{01, 70, 54, 71, 83, 51, 54, 69, 16, 92, 33, 48, 61, 43, 52, 01, 89, 19, 67, 48}};
for ( int x = 0; x<=16;x++)
for (int y = 0; y <= 20; y++)
{
producth(grid,x,y, answer);
cout << answer<<" ";
}
for ( int x = 0; x<=16;x++)
for (int y = 0; y < 20; y++)
{
productv(grid,x,y, answer);
cout << answer<<" ";
}
for ( int x = 0; x<=16;x++)
for (int y = 0; y <= 16; y++)
{
productd1(grid,x,y, answer);
cout << answer<<" ";
}
for ( int x = 0; x<=16;x++)
for (int y = 19; y >=3 ; y--)
{
productd2(grid,x,y, answer);
cout << answer<<" ";
}
return answer;
}
I should have written a function to process the array, instead of loading it by hand, would have saved some time...maybe...