//find a letter within a string
#include <iostream>
using namespace std;
#include<string.h>
void main()
{ char alphabet[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
  char ch='D';
  char* pos;
  pos=strchr(alphabet,'D');
  if (pos==NULL)
    cout<<ch<<" is not an upper case letter in the alphabet\n";
  else
    cout<<"That is an upper case letter\n";
}//main