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  1. //: C03:CatsInHats.cpp
  2. // From Thinking in C++, 2nd Edition
  3. // Available at http://www.BruceEckel.com
  4. // (c) Bruce Eckel 1999
  5. // Copyright notice in Copyright.txt
  6. // Simple demonstration of recursion
  7. #include <iostream>
  8. using namespace std;
  9.  
  10. void removeHat(char cat) {
  11.   for(char c = 'A'; c < cat; c++)
  12.     cout << "  ";
  13.   if(cat <= 'Z') {
  14.     cout << "cat " << cat << endl;
  15.     removeHat(cat + 1); // Recursive call
  16.   } else
  17.     cout << "VOOM!!!" << endl;
  18. }
  19.  
  20. int main() {
  21.   removeHat('A');
  22. } ///:~
  23.