#include<iostream>
#include<cstring>
using namespace std;

int main( )
{ int count(0);
  char s1[ ]="deaafgkaawxyzaa", s2[ ]="aa";
  char *p1(s1), *p2(s2);
  while((p1=strstr(p1,p2))!=NULL)
   { count++;
     p1++;
   }
  cout << "count = " << count << endl;
 return 0;
}