Program to Count number of words in a string

#include<iostream.h>
#include<conio.h>
#include<stdio.h>

void main()
{
clrscr();
char a[20];
int i,count=0;
cout<<"\n Enter a string : ";
gets(a);
for(i=0;a[i]!='\0';++i)
{
if(a[i]==' ')
count++;
}
count++;
cout<<"\n Number of words are : "<<count;
getch();
}


                                                  Output