%{
#include <stdio.h>
int ctTab = 0;
int ctSpace = 0;
int ctLine = 0;
%}
 
%%
 
[\t]      { ctTab++; }
[ ]       { ctSpace++; }
[\n]      { ctLine++; }
.         { /* ignore other characters */ }
 
%%
 
int yywrap() {
    return 1;
}
 
int main(int argc, char *argv[]) {
    if(argc != 2) {
        printf("Usage: ./a.out <FILENAME>\n");
        return 1;
    }
 
    FILE *file = fopen(argv[1], "r");
    if (!file) {
        perror("Error opening file");
        return 1;
    }
 
    yyin = file;
    yylex();
 
    printf("Line Count: %d\n", ctLine);
    printf("Space Count: %d\n", ctSpace);
    printf("Tab Count: %d\n", ctTab);
 
    fclose(file);
    return 0;
}
 

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