fork download
copy 
  1. #include <iostream>
  2. #include <map>
  3.  
  4. struct MyKey {
  5.  
  6.     // key data
  7.     std::string addr;
  8.     int priority;
  9.  
  10.     // constructor
  11.     MyKey(const std::string & s, const int p) 
  12.         : addr(s), priority(p) {}
  13.  
  14.     // overloaded operator
  15.     bool operator<(const MyKey &that) const {
  16.  
  17.         // same key if addr is the same
  18.         if (that.addr == this->addr)
  19.             return false;
  20.  
  21.         // not same key so look at priorities to determine order
  22.         if (that.priority < this->priority)
  23.             return true;
  24.         if (that.priority > this->priority)
  25.             return false;
  26.  
  27.         // priorities are the same so use the string compare
  28.         return (that.addr > this->addr);
  29.     }
  30. };
  31.  
  32.  
  33. int main() 
  34. {
  35.     MyKey mk1{ "a",3 }, mk2{ "b", 2 }, mk3 { "a", 1 };
  36.     std::cout << (mk1 < mk2) << std::endl;
  37.     std::cout << (mk2 < mk3) << std::endl;
  38.     std::cout << (mk1 < mk3) << std::endl;
  39. }
Success #stdin #stdout 0s 4260KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
1
1
0
https://ideone.com/21ZjJK
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!