/**
* Initialize the oRTP library. You should call this function first before using
* oRTP API.
**/
void ortp_init()
{
if (ortp_initialized++) return;
#ifdef _WIN32
win32_init_sockets();
#endif
ortp_init_logger();
av_profile_init(&av_profile);
ortp_global_stats_reset();
init_random_number_generator();
ortp_message("oRTP-" ORTP_VERSION " initialized.");
}
/**
* Initialize the oRTP library. You should call this function first before using
* oRTP API.
**/
void ortp_init()
{
static bool_t initialized=FALSE;
if (initialized) return;
initialized=TRUE;
#ifdef WIN32
win32_init_sockets();
#endif
av_profile_init(&av_profile);
ortp_global_stats_reset();
init_random_number_generator();
ortp_message("oRTP-" ORTP_VERSION " initialized.");
}
int main(void)
{
const int numDoors = 3;
// results[0] = wins, results[1] = losses
int results[2] = {0};
char playAgain = 'Y';
// Set-up RNG
init_random_number_generator();
// Intro to simulator
printf("Welcome to the Monty Hall Problem Simulator!\n\n");
printf("Monty Hall Problem:\nSuppose you're on a game show, \
and you're given the choice of three doors: Behind one door \
is a car; behind the others, goats. You pick a door, say No. \
1, and the host, who knows what's behind the doors, opens \
another door, say No. 3, which has a goat. He then says to \
you, \"Do you want to pick door No. 2?\" Is it to your \
advantage to switch your choice?\n");
while (playAgain == 'Y' || playAgain == 'y')
{
// How many repeated experiments?
int numPlays = 1;
printf("\nHow many plays: ");
scanf("%d", &numPlays);
// Launch experiments
for (int j = 0; j < numPlays; j++)
{
// Always start with door 1 as choice
int choice = 0;
// Set-up doors (2 x numDoors array)
// first row holds winning/losing door info
// second row holds info about whether door is open
bool **doors = setup_doors(numDoors);
// Open first false door that we didn't pick
int losingDoor = 0;
while (losingDoor == choice || doors[0][losingDoor])
{
++losingDoor;
}
doors[1][losingDoor] = true;
// Switch choice to other door
// or the first door we didnt pick and is not opened
// (for experiments with more than 3 doors)
int otherDoor = 0;
while (otherDoor == losingDoor || otherDoor == choice)
{
++otherDoor;
}
choice = otherDoor;
// record results
doors[1][choice] = true;
if (doors[0][choice] == false)
{
// loss
results[1]++;
}
else
{
// win
results[0]++;
}
// clean-up memory
destroy_doors(doors);
}
// print results
printf("Times win car after switching choice: %d\n", results[0]);
printf("Times win goat after switching choice: %d\n\n", results[1]);
printf("Play Again? (Y/N): ");
scanf(" %c", &playAgain);
}
