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#include <iostream> // library that contain basic input/output functions
#include <fstream> // library that contains file input/output functions
using namespace std;
int main()
{
int ocurrences_count = 0;
char word[20]; //this array will save user input
int array_size = 1024; // define the size of character array
char * array = new char[array_size]; // allocating an array of 1kb
int position = 0; //this will be used incremently to fill characters in the array
//prompting user to enter a word to be search in the file
cout << "Please enter the word to search in file : ";
cin.getline(word,19); //reading user input of max 19 characters because our word array size in 20
int word_size = 0;
//this loop is calculating the length of input word
for(int i = 0; word[i] != '\0'; i++)
{
word_size++;
}
ifstream fin("test.txt"); //opening an input stream for file test.txt
/*checking whether file could be opened or not. If file does not exist or don't have read permissions, file
stream could not be opened.*/
if(fin.is_open())
{
//file opened successfully so we are here
cout << "File Opened successfully!!!. Reading data from file into array" << endl;
//this loop run until end of file (eof) does not occur
while(!fin.eof() && position < array_size)
{
fin.get(array[position]); //reading one character from file to array
position++;
}
array[position-1] = '\0'; //placing character array terminating character
//this loop is searching for the word in the array
for(int i = 0; array[i] != '\0'; i++)
{
for(int j = 0; word[j] != '\0' && j < 20 ; j++)
{
if(array[i] != word[j])
{
break;
}
else
{
i++;
if(word[j+1] == '\0')
{
cout << "Word Found in File at position " << (i-word_size) << endl;
ocurrences_count++;
}
}
}
}
cout << "Total occurences found : " << ocurrences_count << endl;
}
else //file could not be opened
{
cout << "File could not be opened." << endl;
}
return 0;
}
