%{
#include <stdio.h>
 
int single = 0;
int multi = 0;
extern FILE *yyin;  // Declare yyin
%}
 
%%
// Match single-line comments
"//".* { ++single; }
 
// Match multi-line comments
"/*"([^*]|\*+[^*/])*\*+"/" { ++multi; }
 
%%
 
int main(int argc, char **argv) {  // Fix argument type
    yyin = fopen("abc.txt", "r");
    if (!yyin) {
        perror("Error opening file");
        return 1;
    }
    yylex();
    fclose(yyin);  // Close file after reading
    printf("Number of single-line comments = %d\n", single);
    printf("Number of multi-line comments = %d\n", multi);
    return 0;
}
 

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