COUNT THE NUMBER OF OCCURRENCES OF ANY TWO VOWELS IN SUCCESSION IN A LINE OF TEXT USING C

#include <stdio.h>

int isvowel(char chk);

int main()

{

  char text[1000], chk;

  int count;

  count = 0;

  while( (text[count] = getchar()) != '\n' )

            count++;

  text[count] = '\0';

  count = 0;

  while ( (chk = text[count]) != '\0' )

  {

            if ( isvowel(chk) )

            {

                        if ( (chk = text[++count]) && isvowel(chk) )

                        {

                                    putchar(text[count -1]);

                                    putchar(text[count]);

                                    putchar('\n');

                        }

            }

            else

                        ++count;

  }

  return 0;

}

 int isvowel(char chk)

 {

  if ( chk == 'a' || chk == 'e' || chk == 'i' || chk == 'o' || chk == 'u' )

            return 1;

  return 0;

}