7. Lex program to count the number of vowels in a file

The program searches for vowels inside every words and count the number.

for example in the line "A man is Walking" there are 5 vowels namely "a,a,i,a,i"

Here is the code :

%{
int count=0;
%}
%%
[aeiouAEIOU] {printf("%s",yytext);count++;}   
%%
main()
{
    extern FILE *yyin;
    yyin=fopen("new","r");
    yylex();
    printf("\nTotal=%d",count);
}