Program to count no of blank spaces and no of words in a string

/*Serial No.103     [swami80.cpp]*/

#include<stdio.h>
#include<conio.h>
#include<string.h>
int xstrlen(char *);
void main()
{
char s1[20];
int len;
clrscr();
printf("\nEnter the string:");
gets(s1);
len=xstrlen(s1);
printf("\nlength of the string =%d",len);
getch();
}
int xstrlen(char *s)
    {
    int l=0,m=0;
    while(*s)
      {
      if(*s==' ')
        {
        m++;
        }
      l++;
      s++;
      }
      printf("\nNo. of the blank spaces=%d",m);
      printf("\nNo. of the words=%d",m+1);
      printf("\n[--only if words are saparated by single space--]");
    return (l);
    }