Card Shuffling - Revision history

Legg at 02:16, 22 December 2020

2020-12-22T02:16:44Z

Legg: /* Code */

2020-12-22T02:13:26Z

Code

Legg: /* Code */

2020-12-22T02:10:51Z

Code

Legg: /* Code */

2020-12-22T01:57:03Z

Code

Legg: /* Code */

2020-12-22T01:44:45Z

Code

Legg: Created page with "==Synopsis== Define a deck of cards in an array. Shuffle these cards in O(n) time using modulus arithmetic ==Notes== This code is specifically designed to leave an occasio..."

2020-12-22T01:44:23Z

Created page with "==Synopsis== Define a deck of cards in an array. Shuffle these cards in O(n) time using modulus arithmetic ==Notes== This code is specifically designed to leave an occasio..."

New page

==Synopsis==

Define a deck of cards in an array. Shuffle these cards in O(n) time using modulus arithmetic

==Notes==

This code is specifically designed to leave an occasional card in it's original location.

==Code==
#include<stdio.h>
#include<stdlib.h>
#include<time.h>

#define NUM_CARDS 52

int main(void)
{
short counter_a;
short d;
time_t t;
char a[NUM_CARDS];
char c;

const char *n[NUM_CARDS];

n[0] = "Ace of spades";
n[1] = "2 of spades";
n[2] = "3 of spades";
n[3] = "4 of spades";
n[4] = "5 of spades";
n[5] = "6 of spades";
n[6] = "7 of spades";
n[7] = "8 of spades";
n[8] = "9 of spades";
n[9] = "10 of spades";
n[10] = "Jack of spades";
n[11] = "Queen of spades";
n[12] = "King of spades";
n[13] = "Ace of hearts";
n[14] = "2 of hearts";
n[15] = "3 of hearts";
n[16] = "4 of hearts";
n[17] = "5 of hearts";
n[18] = "6 of hearts";
n[19] = "7 of hearts";
n[20] = "8 of hearts";
n[21] = "9 of hearts";
n[22] = "10 of hearts";
n[23] = "Jack of hearts";
n[24] = "Queen of hearts";
n[25] = "King of hearts";
n[26] = "Ace of clubs";
n[27] = "2 of clubs";
n[28] = "3 of clubs";
n[29] = "4 of clubs";
n[30] = "5 of clubs";
n[31] = "6 of clubs";
n[32] = "7 of clubs";
n[33] = "8 of clubs";
n[34] = "9 of clubs";
n[35] = "10 of clubs";
n[36] = "Jack of clubs";
n[37] = "Queen of clubs";
n[38] = "King of clubs";
n[39] = "Ace of diamonds";
n[40] = "2 of diamonds";
n[41] = "3 of diamonds";
n[42] = "4 of diamonds";
n[43] = "5 of diamonds";
n[44] = "6 of diamonds";
n[45] = "7 of diamonds";
n[46] = "8 of diamonds";
n[47] = "9 of diamonds";
n[48] = "10 of diamonds";
n[49] = "Jack of diamonds";
n[50] = "Queen of diamonds";
n[51] = "King of diamonds";

//Spice up the random function.
srand((unsigned) time(&t));

//initialize with unsorted numbers
for(counter_a=0;counter_a<NUM_CARDS;counter_a++)
{
a[counter_a] = counter_a;
}

counter_a--;
while(counter_a>0)
{
//if statement, because sometimes we don't want to
//always swap a card. The larger the comparison
//number, the more frequently it is that a pair
//isn't swapped

if(rand() % (NUM_CARDS)>2)
{
d=rand() % counter_a;
c=a[counter_a];
a[counter_a]=a[d];
a[d]=c;
}
counter_a--;
}

printf ("Unsorted\n");

for(;counter_a<NUM_CARDS;counter_a++)
{
printf(" %s\n", n[a[counter_a]]);
}

printf("Done !\n");
return 0;
}

</syntaxhighlight>

@@ Line 7: / Line 7: @@
 This code is specifically designed to leave an occasional card in it's original location.
 ==Code==
 <syntaxhighlight lang="C++" line='line'>

@@ Line 106: / Line 106: @@
 		counter_a--;
+	}
-	printf("Out of cards, I'm done !\n");
+	printf("Finally, the %s. I'm done !\n", n[a[0]] );
 	return 0;
+}
 </syntaxhighlight>

@@ Line 79: / Line 79: @@
 	n[51] = "King of diamonds";
-	//Spice up the random function.
+	//Initialize the random function.
 	srand((unsigned) time(&t));

@@ Line 8: / Line 8: @@
 ==Code==
 #include<stdio.h>
 #include<stdlib.h>