fork download
copy 
  1. #include <iostream>
  2. #include <cstdlib> 
  3. #include <cstdio>
  4. #include <string>
  5.  
  6. int color_of_card(int i)
  7. {
  8.     return i / 13;
  9. }
  10.  
  11. int value_of_card(int i)
  12. {
  13.     return i % 13;
  14. }
  15.  
  16. std::string card_as_string(int i)
  17. {
  18.     static const std::string facevalues[] = {
  19.         "Two", "Three", "Four", "Five", "Six", "Seven",
  20.         "Eight", "Nine", "Ten", "Jack", "Queen", "King", "Ace"
  21.     };
  22.     static const std::string suits[] = { "Diamonds", "Hearts", "Spades", "Clubs" };
  23.  
  24.     return facevalues[value_of_card(i)] + " of " + suits[color_of_card(i)];
  25. }
  26.  
  27. int getcard() {
  28.     return rand() % 52;
  29. }
  30.  
  31. int main() {
  32.     const int times = 1000;
  33.  
  34.     int counter = 0;
  35.     for (int y = 0; y != times; y++) {
  36.         const auto card1 = getcard();
  37.         auto card2 = getcard();
  38.         while (card1 == card2) { card2 = getcard(); } // Ensure cards differ.
  39.  
  40.         if (value_of_card(card1) == value_of_card(card2)) {
  41.             ++counter;
  42.         }
  43.     }
  44.     std::cout << counter << std::endl;  // 58 or 59 normally
  45.     // Once you took a card, there are only 3 card on same value
  46.     // and there is 51 remaining cards.
  47.     std::cout << 3 / 51.f << std::endl; // 0.0588235
  48. }
  49.  
Success #stdin #stdout 0s 4528KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
58
0.0588235
https://ideone.com/bEASYd
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!