/* Lex program to count the number of vowels & consonants from the given input string */
%{
#include <stdio.h>
 
int vow = 0, con = 0;
%}
 
%%
 
[ \t\n]+           ;           /* Ignore whitespace */
[aeiouAEIOU]       { vow++; }  /* Count vowels */
[a-zA-Z&&[^aeiouAEIOU]] { con++; }  /* Count consonants */
 
.                  ;           /* Ignore all other characters */
 
%%
 
int main() {
    printf("Enter some input string:\n");
    yylex();
    printf("Number of vowels = %d\n", vow);
    printf("Number of consonants = %d\n", con);
    return 0;
}
 
int yywrap() {
    return 1;
}
 

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