A-M baby

Task/Monty-Hall-problem/C/monty-hall-problem.c

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+//Evidence of the Monty Hall solution.
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+
+#define GAMES 3000000
+
+int main(void){
+    unsigned i, j, k, choice, winsbyswitch=0, door[3];
+
+    srand(time(NULL));                                                          //initialize random seed.
+    for(i=0; i<GAMES; i++){
+        door[0] = (!(rand()%2)) ? 1: 0;                                         //give door 1 either a car or a goat randomly.
+        if(door[0]) door[1]=door[2]=0;                                          //if 1st door has car, give other doors goats.
+        else{ door[1] = (!(rand()%2)) ? 1: 0; door[2] = (!door[1]) ? 1: 0; }    //else, give 2nd door car or goat, give 3rd door what's left.
+        choice = rand()%3;                                                      //choose a random door.
+
+        //if the next door has a goat, and the following door has a car, or vice versa, you'd win if you switch.
+        if(((!(door[((choice+1)%3)])) && (door[((choice+2)%3)])) || (!(door[((choice+2)%3)]) && (door[((choice+1)%3)]))) winsbyswitch++;
+    }
+    printf("\nAfter %u games, I won %u by switching.  That is %f%%. ", GAMES, winsbyswitch, (float)winsbyswitch*100.0/(float)i);
+}