Question

Write the following C++ program that searches for specified words hidden within a matrix of letters.

1) Read a file that the user specifies. The file will first specify the dimensions of the matrix (e.g., 20 30). These two numbers specify the number of rows in the matrix and then the number of columns in the matrix.

2) Following these two numbers, there will be a number of rows of letters. These letters should be read into your matrix row by row, column by column.

3) Following the rows of letters, there will be some number of words that might be hidden within the matrix. You are to search for these words and report 1) whether or not a given word is found within the matrix, and if so, the starting and ending matrix coordinates of the word.

4) Search for each word one at a time (i.e., read a word, search for it, report the results, and then read the next word from the file). Continue until all words have been searched for.

5) Start by creating your own file of data. You can start with a small matrix size and your own hidden words. When you’re ready, start testing one or more of the files I’m going to upload for your use.

6) To test your program, I suggest searching for the first 4 letters in the top row, then the first 4 letters in the leftmost (first) column, and then the first 4 letters starting from position [0][0] down the diagonal to the right and down. That will let you know if you are traversing the matrix properly.

7) Provide for fault-tolerance when trying to open the input file. If it doesn’t exist or can’t be found, tell the user. Also, tell the user the name of the file that can’t be found/opened. Then give the user a chance to enter another file name and try to open that file. Continue until you either find and open the file or until the user types something like “quit” or “exit.” If you feel comfortable doing so, use the perror function to report the system’s error message; then report your own error messages. Make sure your program can handle bad file names and/or non-existent files.

8) Don’t report success or failure for each word as you go. Instead, report only words that are found; but for words that are not found, shove them into a vector of strings and wait until you’ve searched for all words before reporting the words that weren’t found. Thus, you will have all successfully found words appear first -- along with their coordinates and (optionally) their direction -- and then the words that weren’t found will be listed at the end.

9) Assume that words can appear more than once in the matrix.

10) Don’t worry about wrapping around the edges of the matrix. Instead, if you hit an edge while searching, assume the word isn’t in the matrix.

11) Finally, add an interactive capability to your program that asks the user to enter additional words to search for in the matrix once you’ve searched for all words in the data file.

The following is hiddenWords.txt

15 18
SCFRBOBROBERTSLOKL
TNLESREKCILSYTICRL
AOEPOBLRUAECHBUDEA
RITOTHEYOMTOLBATPH
LCHAIBAONILLAURGEI
AEKNLULDDGCISLHKLN
CRRURDBHSAGTEOPLUS
LOTCLULHLLBPCRAPLA
UMSKIROPOULALPEAAK
EHNSAHNNSTLASACCEH
LSOORADTEHSHBKCROA
EUOUFMEMECOHETHEER
SRMPARTRBTAROSAASV
SLEISTOOTHERUTLESE
NATTAHNAMSEYSLSSMY

ALLOFME
ANNIEHALL
BABE
BEINGTHERE
BIG
BOBROBERTS
BULLDURHAM
CARS
CATBALLOU
CITYSLICKERS
MEATBALLS

Answer 1

//Your code

#include<bits/stdc++.h>
#include<fstream>
using namespace std;
int main(){
   ifstream fout;
   string line;
   while(1){
       printf("Enter file Name or Enter exit to stop\n");
       string st;
       getline(cin,st);//reading file
       if(st == "exit")
           break;
       fout.open(st);
       //cout<<fout<<endl;
       if(!fout){//If file not opened
           perror("File Not found\n");continue;
       }else{
           int i=0,n,j,m,k;
           fout>>n;
           fout>>m;
           cout<<n<<" "<<m<<endl;
           //char c;
           //fout>>c;
           i=0;
           string line;
           char mat[n+1][m+1];
           while(fout && i < n){
               getline(fout,line);
               if(line.size() > 0){
               cout<<line<<endl;
               for( j = 0 ; j < m ; j++ )
                   mat[i][j] = line[j];
               i++;
               }
           }
           vector<string>v_s;//to store Not found string
           int ex=1;
           while(ex){
               if(fout){
                   getline(fout,line);
               }else{
                   printf("If you want to enter more words to search ,Enter word else Enter exit\n");
                   cin>>line;
                   if(line == "exit")break;
               }
               //cout<<line<<" ";
               int fl = 0 ,l = line.size();
               for( i = 0 ; i < n ; i++ ){//Searching string
                   for( j = 0 ; j < m ; j++ ){
                       fl=0;
                       for( k = 0 ; k < l && j+k < m; k++ ){
                           if(mat[i][j+k] == line[k] )fl++;
                           else break;
                       }
                       if(fl == l){
                           i=n;j=m;break;
                       }
                       fl=0;
                       for( k = 0 ; k < l && i+k < m; k++ ){
                           if(mat[i+k][j] == line[k] )fl++;
                           else break;
                       }
                       if(fl == l){
                           i=n;j=m;break;
                       }
                       fl=0;
                       for( k = 0 ; k < l && j+k < m && i+k < n; k++ ){
                           if(mat[i+k][j+k] == line[k] )fl++;
                           else break;
                       }
                       if(fl == l){
                           i=n;j=m;break;
                       }  
                   }
               }
               if(fl == l && fl){//If string is found
                   cout<<line<<" is found"<<endl;
               }else{
                   v_s.push_back(line);
               }
           }
           printf("Not found words are\n");
           for( i = 0 ; i < v_s.size() ; i++ )
               if(v_s[i].size() > 0)
               cout<<v_s[i]<<endl;
           getchar();
       }
      
   }
return 0;
}

//Screenshot of editor

//Screenshot of my output terminal

//If you have any doubt.Please feel free to ask.

Thanks