Head or tail prediction

head_tail.cpp

#include <iostream>
#include <ctime>

inline bool randomBool()
{
  return rand() % 2;
}

int heads = 0;
int tails = 0;

int right = 0;
int wrong = 0;

int main()
{
  srand(time(NULL));

  while(heads + tails < 10000)
  {
    bool draw = randomBool();

    if(heads != tails)
    {
      bool pre_draw = heads < tails;
      
      if(draw == pre_draw)
      {
        right++;
      }
      else
      {
        wrong++;
      }
    }

    //std::cout << "draw : " << (draw ? "heads" : "tails") << std::endl;

    if(draw)
    {
      heads++;
    }
    else
    {
      tails++;
    }
  }

  std::cout << "draws : " << heads + tails << std::endl;
  std::cout << "heads : " << heads << std::endl;
  std::cout << "tails : " << tails << std::endl;
  
  std::cout << std::endl;
  
  std::cout << "tries : " << right + wrong << std::endl;
  std::cout << "right : " << right << std::endl;
  std::cout << "wrong : " << wrong << std::endl;

  return 0;
}