Created
May 16, 2013 03:27
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prize and 3 doors riddle
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| #include <stdio.h> | |
| #include <stdlib.h> | |
| #include <time.h> | |
| #define NUMBER_OF_GAMES 1000 | |
| #define NUMBER_OF_CHOICES 3 | |
| int main(int argc, char const *argv[]) { | |
| int arr[NUMBER_OF_GAMES][NUMBER_OF_CHOICES] = {0}; | |
| int not_switch_wins = 0; | |
| int switch_wins = 0; | |
| srand(time(NULL)); | |
| // init car door | |
| for(int i = 0; i < NUMBER_OF_GAMES; ++i) { | |
| arr[i][rand()%NUMBER_OF_CHOICES] = 1; | |
| } | |
| // init player's choice | |
| for(int i = 0; i < NUMBER_OF_GAMES; ++i) { | |
| int r = rand() % NUMBER_OF_CHOICES; | |
| if(arr[i][r] == 1) { | |
| // if player guessed right | |
| int s = rand() % 2; | |
| if(s == 0) { | |
| // if player switch then he lose | |
| ++not_switch_wins; | |
| } | |
| } | |
| else { | |
| // if player guessed wrong | |
| int s = rand() % 2; | |
| if(s == 1) { | |
| // if player switch switch then he win | |
| ++switch_wins; | |
| } | |
| } | |
| } | |
| for(int i = 0; i < NUMBER_OF_GAMES; ++i) { | |
| printf("%d%d%d\n", arr[i][0], arr[i][1], arr[i][2]); | |
| } | |
| printf("Total NOT SWITCH wins = %d\nProbability = %f\n", not_switch_wins, (float)not_switch_wins/(float)NUMBER_OF_GAMES * 100.0f); | |
| printf("Total SWITCH wins = %d\nProbability = %f\n", switch_wins, (float)switch_wins/(float)NUMBER_OF_GAMES * 100.0f); | |
| return 0; | |
| } |
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