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  1. #include <iostream>
  2. int order(std::string s) {
  3.   int n, len;
  4.   if (s.empty())
  5.     return 0;
  6.   n = order(s.substr(0, (len = s.length()) - 1)) * 26;
  7.   n += (int)((char)s[len - 1] - 'A' + 1);
  8.   return n;
  9. }
  10.  
  11. class C {
  12.   int n;
  13. public:
  14.   C(std::string s) : n(order(s)) {};
  15.   friend std::ostream &operator<<(std::ostream &stream, C c) {
  16.     stream << c.n;
  17.     return stream;
  18.   }
  19. };
  20.  
  21. int main() {
  22.   std::string s;
  23.   s = "A"; std::cout << s << ':' << C(s) << std::endl;
  24.   s = "Z"; std::cout << s << ':' << C(s) << std::endl;
  25.   s = "AA"; std::cout << s << ':' << C(s) << std::endl;
  26.   s = "AZ"; std::cout << s << ':' << C(s) << std::endl;
  27.   s = "BA"; std::cout << s << ':' << C(s) << std::endl;
  28.   s = "ZZ"; std::cout << s << ':' << C(s) << std::endl;
  29.   s = "AAA"; std::cout << s << ':' << C(s) << std::endl;
  30.   return 0;
  31. }
  32. /* end */
  33.  
Success #stdin #stdout 0s 3032KB
comments (?)
stdin 
Standard input is empty
stdout 
A:1
Z:26
AA:27
AZ:52
BA:53
ZZ:702
AAA:703
https://ideone.com/XdFbdQ
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

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