🚀 go-pugleaf

// this previous version of this program assumes that we are drawing from
// an infinite deck.  (which is a bug).

// now this version has no such problem...
// but still the probability is around 0.004...
// which is four times the theoretical value 0.001441

// what's wrong???!!!

#include <iostream.h>
#include <time.h>
#include <stdlib.h>
#include <math.h>

static int hand[5];
long COUNTER=0, GOOD=0;

int getRandom(){
int n,BAD=1;
while(BAD){
n=rand()%52+1;
for(int i=0;i<5;i++){
	int FLAG=0;
	if(n==hand[i])FLAG=1;
	if(!FLAG)BAD=0;
	}}
return(n);
}

void init(){
for(int i=0;i<5;i++)hand[i]=0;
for(i=0;i<5;i++)hand[i]=getRandom();
for(i=0;i<5;i++)hand[i]=hand[i]%13;
}

int fullhouse(){
int counter[13],flag2=0,flag3=0;
for(int i=0;i<13;i++)counter[i]=0;
for(i=0;i<5;i++)counter[hand[i]]++;
for(i=0;i<13;i++){
	if(counter[i]==2)flag2++;
	if(counter[i]==3)flag3++;
	}
return(flag2&&flag3);
}

main(){
randomize();
while(1){
COUNTER++;
init();
if(fullhouse())GOOD++;
if(!fmod(COUNTER,10000))cerr<<COUNTER<<double(GOOD)/COUNTER<<"\n";
}}