Random function

[taqmunoz]

For my final project I am supposed to design a game of War. My main question is, after reading a file (Deck of 52) and initializing an array to have all the number cards. My question is, how do you split that array into two random hands?

Here's a sample of my code in case it is needed, but I just need to know how the random function works. And if there's any suggestions.

/* 
This program will make a game of war between two players
*/

#include<stdio.h>
#include<math.h>
int main(void)
{
	int i,j; //iterators
	int Deck[13][4];//array for the Deck of 52
	int P1[13][2];//Player 1 array
	int P2[13][2];//Player 2 array

	FILE* inCards;//file to read
	inCards=fopen("cards.txt", "r");
	if(inCards==NULL)
	{
		printf("Could not open file.");//either we typed it wrong or the file is fucked
	}

	else
	{
		for(i=0;i<13;i++)//Intialize the array
		{
			for(j=0;j<4;j++)
			{//Initialize the array and make sure it stops at the end of the file
				if (fscanf(inCards,"%d",&Deck[i][j])==EOF)//If the file reaches the end, it'll mark an error.
				{
					printf("error");
				}
			}
		}
	}

	//FIND WAY TO RANDOMIZE THE DECK INTO TWO PLAYER HANDS

	fclose(inCards);
　
　
　
	printf("******\n* *\n* %d *\n* *\n******");//Wartime Display 
	return(0);
}

[MarciusV]

Search for a 'rand' function on this site

[long double main]

Or...try a Fisher-Yates shuffle:
http://en.wikipedia.org/wiki/Fisher-Yates_shuffle

Then take the first half and make that the first player's hand and make the second half the second player's hand.