C: Kira berapa bilangan huruf dan patah perkataan

#include<stdio.h>
#include<conio.h>
int main()
{
 int count_words=0,count_char=0,i;
 char str[20];
 printf("Masukkan teks : ");
 gets(str);
 for(i=0; str[i]!=NULL; i++)
 {
   count_char++;
   if(str[i]==' ')
      count_words++;
 }
 printf("\nBil huruf     : %d",count_char);
 printf("\nBil perkataan : %d",count_words+1);
 getch();
 return 0;
}