WAP to count the different types of characters in given string?

 WAP to count the different types of characters in a given string?  
 #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;  
 }