This program builds on the program developed in part
1. This program will read a word search from the provided file name. you will develop six methods, (1) a method to search for a word placed in a horizontal direction(rows) in the word search,
(2) a method to search for a word placed in a vertical direction (columns) in the word search,
(3) a method to search for a word placed in a diagonal direction in the word search, and
(4) test methods for the horizontal, vertical, and diagonal search methods.

The solution is in C++

Explanation:

// C++ programs to search a word in a 2D grid  

#include<bits/stdc++.h>  

using namespace std;  

// Rows and columns in given grid  

#define R 3  

#define C 14  

// For searching in all 8 direction  

int x[] = { -1, -1, -1, 0, 0, 1, 1, 1 };  

int y[] = { -1, 0, 1, -1, 1, -1, 0, 1 };  

// This function searches in all 8-direction from point  

// (row, col) in grid[][]  

bool search2D(char grid[R][C], int row, int col, string word)  

{  

// If first character of word doesn't match with  

// given starting point in grid.  

if (grid[row][col] != word[0])  

return false;  

int len = word.length();  

// Search word in all 8 directions starting from (row,col)  

for (int dir = 0; dir < 8; dir++)  

{  

 // Initialize starting point for current direction  

 int k, rd = row + x[dir], cd = col + y[dir];  

 // First character is already checked, match remaining  

 // characters  

 for (k = 1; k < len; k++)  

 {  

 // If out of bound break  

 if (rd >= R || rd < 0 || cd >= C || cd < 0)  

   break;  

 // If not matched, break  

 if (grid[rd][cd] != word[k])  

   break;  

 // Moving in particular direction  

 rd += x[dir], cd += y[dir];  

 }  

 // If all character matched, then value of must  

 // be equal to length of word  

 if (k == len)  

 return true;  

}  

return false;  

}  

// Searches given word in a given matrix in all 8 directions  

void patternSearch(char grid[R][C], string word)  

{  

// Consider every point as starting point and search  

// given word  

for (int row = 0; row < R; row++)  

for (int col = 0; col < C; col++)  

 if (search2D(grid, row, col, word))  

 cout << "pattern found at " << row << ", "

   << col << endl;  

}  

// Driver program  

int main()  

{  

char grid[R][C] = {"GEEKSFORGEEKS",  

   "GEEKSQUIZGEEK",  

   "IDEQAPRACTICE"

   };  

patternSearch(grid, "GEEKS");  

cout << endl;  

patternSearch(grid, "EEE");  

return 0;  

}  

(because i need 20 chars)