why do i keep getting the same1??

#include <iostream>

#include <ctime>

using namespace std;

struct card
{
	int value;

	char suit[10];

	char faceCard[10];
};

int deal(card deck[maxcards], int decksize, int &z);

void shuffle(card deck[], int decksize);

int score =0;

int main()
{
	int scoretracker =0;

	card deck[52]={{11, "s", "ace"}, {11, "h", "ace"}, {11, "c", "ace"}, {11, "d", "ace"}, {10, "s", "jack"}, {10, "h", "jack"}, {10, "c", "jack"}, {10, "d", "jack"}, {10, "s", "queen"}, {10, "h", "queen"}, {10, "c", "queen"}, {10, "d", "queen"}, {10, "s", "king"}, {10, "h", "king"}, {10, "c", "king"}, {10, "d", "king"}, {1, "s", "" }, {2, "s", "" }, {3, "s", "" }, {4, "s", "" }, {5, "s", "" }, {6, "s", "" }, {7, "s", "" }, {8, "s", "" }, {9, "s", "" }, {1, "h", "" }, {2, "h", "" }, {3, "h", "" }, {4, "h", "" }, {5, "h", "" }, {6, "h", "" }, {7, "h", "" }, {8, "h", "" }, {9, "h", "" }, {1, "c", "" }, {2, "c", "" }, {3, "c", "" }, {4, "c", "" }, {5, "c", "" }, {6, "c", "" }, {7, "c", "" }, {8, "c", "" }, {9, "c", "" }, {1, "d", "" }, {2, "d", "" }, {3, "d", "" }, {4, "d", "" }, {5, "d", "" }, {6, "d", "" }, {7, "d", "" }, {8, "d", "" }, {9, "d", "" }};  
	
	while(true)
	{
		int userinput;

		cout<<"If you want to play, press 1, othwerwise press 2 to exit"<<endl;
		cin>>userinput;

			if(userinput ==1)
			{
		
				shuffle(deck, 52);
			
				for(int i = 0, x = 0; i < 52; i++, x++)
				{

				deal(deck, 52, x);

				scoretracker = score;

				
			}

				cout<<"Your correct score so far is: "<<scoretracker<<endl;

				continue;

			}

		else
		break;
	}

}

void shuffle(card deck[], int decksize)
{
	for(int i =0; i < decksize; i++)
	{
		srand(time(0));
		
		int number = rand() % 52;

		if(true)
		{
			deck[i] = deck[number];

		}
	}
}

int deal(card deck[], int decksize, int &z)
{
	
	char guess[10];

	cout<<"Now guess high or low"<<endl;
	cin>>guess;

	for(; z < decksize;)
	{
		if(deck[z].value == 10 || deck[z].value == 11)
		{
			cout<<"The card is high "<<deck[z].value<<" "<<deck[z].suit<<" "<<deck[z].faceCard<<endl;
	
			score++;
		
			 break;
		}
	
		else if(deck[z].value == 1)
		{
			cout<<"The card is high "<<deck[z].value<<" "<<deck[z].suit<<" "<<endl;
	
			score++;
		
			break;
		}
		
		else if(deck[z].value == 2)
		{
			cout<<"The card is high "<<deck[z].value<<" "<<deck[z].suit<<" "<<endl;
	
			score++;

			break;
		}

		else if(deck[z].value == 3)
		{
			cout<<"The card is high "<<deck[z].value<<" "<<deck[z].suit<<" "<<endl;
	
			score++;

			break;
		}
	
		else if(deck[z].value == 4)
		{
			cout<<"The card is high "<<deck[z].value<<" "<<deck[z].suit<<" "<<endl;
	
			score++;

			break;
		}
	
		else if(deck[z].value == 5)
		{
			cout<<"The card is high "<<deck[z].value<<" "<<deck[z].suit<<" "<<endl;
	
			score++;
		
			break;
		}

		else if(deck[z].value == 6)
		{
			cout<<"The card is high "<<deck[z].value<<" "<<deck[z].suit<<" "<<endl;
	
			score++;

			break;
		}

		else if(deck[z].value == 7)
		{
			cout<<"The card is high "<<deck[z].value<<" "<<deck[z].suit<<" "<<endl;
	
			score++;

			break;
		}
	
		else if(deck[z].value == 8)
		{
			cout<<"The card is high "<<deck[z].value<<" "<<deck[z].suit<<" "<<endl;
	
			score++;

			break;
		}

		else if(deck[z].value == 9)
		{
			cout<<"The card is high "<<deck[z].value<<" "<<deck[z].suit<<" "<<endl;
	
			score++;


			break;
		}
	}

	return score;
}

In your "shuffle" function, try moving the random number seed function "srand" out of the loop. You're re-seeding the generator with the same number on each pass, since you're in and out of that routine within a second.

Yep you only need it once for the entire program. Then just call rand() % 52 wherever you need it.

If you're going to be doing a bunch of random numbers at a time, its a good idea to have it wait a bit before generating the next number.

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