Write a program which will read a text and count all occurrences of a particular word.

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

void main()
{
    char a[100],b[20],c[20];
    int i,count=0,k=0,len;
    clrscr();
    printf ("\nEnter a string:-> ");
    gets(a);
    printf("\nEnter the word to be searched:-> ");
    gets(b);
    len=strlen(a);
    for(i=0;i<=len;i++)
    {
        //Assuming Space , Tab and NULL as word separator
        if(a[i]==32 || a[i]=='\t' || a[i]=='\0')
        {
            c[k]='\0';
            if(strcmp(b,c)==0)
                count++;
            k=0;
        }
        else
        {
            c[k]=a[i];
            k++;
        }
    }
    printf("Occurance of %s is = %d",b,count);
    getch();
}