Count number of wrods and characters in string

/* C programe for counting the number of characters and words in a given string */

#include<stdio.h>

#include<conio.h>

int main()

{

 int count_words=0,i;
 int count_char=0;

 char str[20];

 printf("Enter string : ");

 gets(str);

 for(i=0; str[i]!=NULL; i++)
 {

   count_char++;
   if(str[i]==' ')
      count_words++;
 }

 printf("\nNumber of characters in string : %d",count_char);
 printf("\nNumber of words in string : % d",count_words+1);
 getch();
 return 0;

}

     Output of above program :

Enter string : c programming codes

Number of characters in string : 19

Number of words in string : 3