%{
#include <stdio.h> #include <string.h>
 
int count = 0; // Counter to keep track of the word frequency char word[100]; // The target word to search for
%}
 
%%
{word} { count++; } // Increment the counter whenever the word is found
.|\n ;	// Ignore other characters
%%
 
int main(int argc, char *argv[]) {
 
 
if (argc != 3) {
printf("Usage: %s <filename> <word_to_search>\n", argv[0]); return 1;
}
 
FILE *file = fopen(argv[1], "r"); if (!file) {
printf("Error: Could not open file %s\n", argv[1]); return 1;
}
strcpy(word, argv[2]); // Copy the target word to search into the global 'word' variable yyin = file; // Set the input stream to the file
yylex();	// Start the lexical analysis
 
printf("The word '%s' appears %d times in the file %s.\n", word, count, argv[1]);
 
fclose(file); return 0;
}
 

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