#include <stdlib.h>

#include <time.h>

#define FALSE 0

#define TRUE 1

#define REMOVED 10

void

swap(char *a, char *b)

{

char t = *a;

*a = *b;

*b = t;

}

void

init(char field[], int *pairsLeft, int *player)

{

int i, random;

srand((unsigned int) time(NULL));

for (i = 0; i < 10; ++i) {

field[2*i] = field[2*i+1] = i;

}

for (i = 0; i < 20; ++i) {

random = (int) ((20.0 – i) * (rand() / (RAND_MAX + 1.0)));

swap(field + i, field + i + random);

}

*pairsLeft = 10;

*player = 0;

}

void

displayField(char field[], int turned, int turnedIndex[])

{

int turnThis = FALSE;

int i, j, k;

for (i = 0; i < 6; ++i) {

printf(”\n\n\n\n\n\n\n\n\n\n”);

}

printf(”     0   1   2   3   4\n”);

printf(”   +—+—+—+—+—+\n”);

for (i = 0; i < 4; ++i) {

printf(” %d |”, i);

for (j = 0; j < 5; ++j) {

if (*field != REMOVED) {

turnThis = FALSE;

for (k = 0; k < turned; ++k) {

if ((i == turnedIndex[2*k]) && (j == turnedIndex[2*k+1])) {

turnThis = TRUE;

break;

}

}

if (turnThis == TRUE) {

printf(” %d |”, *field);

} else {

printf(” # |”);

}

} else {

}

++field;

}

printf(”\n”);

printf(”   +—+—+—+—+—+\n”);

}

printf(”\n”);

}

int

isMoveOk(int row, int col, int read,

char field[], int turned, int turnedIndex[])

{

int i;

if (read != 2) {

scanf(”%*s”);

printf(”Bitte Geben Sie zwei Zahlen wie \”1,2\”\n”);

return FALSE;

}

if ((row < 0) || (row > 3)) {

printf(”Zeile ist falsch eingegeben\n”);

return FALSE;

}

if ((col < 0) || (col > 4)) {

printf(”Spalte ist falsch eingegeben\n”);

return FALSE;

}

if (field[row * 5 + col] == REMOVED) {

printf(”Card is already removed\n”);

return FALSE;

}

for (i = 0; i < turned; ++i) {

if ((row == turnedIndex[2*i]) && (col == turnedIndex[2*i+1])) {

printf(”Card is already turned\n”);

return FALSE;

}

}

return TRUE;

}

int

isPair(char field[], int *turned, int *pairsLeft)

{

if (field[turned[0]*5 + turned[1]] == field[turned[2]*5 + turned[3]]) {

field[turned[0]*5 + turned[1]] = field[turned[2]*5 + turned[3]] = REMOVED;

(*pairsLeft)–;

return TRUE;

} else {

return FALSE;

}

}

int

main(void)

{

int pairsLeft;

int player;

int read;

int turned[4];

int playerPairs[2] = {0, 0};

char field[20];

init(field, &pairsLeft, &player);

while (pairsLeft != 0) {

displayField(field, 0, NULL);

printf(”Spieler “);

if (player == 0) {

printf(”1 (%d:%d)\n”, playerPairs[0], playerPairs[1]);

} else {

printf(”2 (%d:%d)\n”, playerPairs[1], playerPairs[0]);

}

do {

printf(”1.Karte (Zeile,Spalte): “);

read = scanf(”%d , %d”, turned, turned + 1);

getchar();

} while (!isMoveOk(turned[0], turned[1], read, field, 0, NULL));

displayField(field, 1, turned);

printf(”Spieler “);

if (player == 0) {

printf(”1 (%d:%d)\n”, playerPairs[0], playerPairs[1]);

} else {

printf(”2 (%d:%d)\n”, playerPairs[1], playerPairs[0]);

}

do {

printf(”2.Karte (Zeile,Spalte): “);

read = scanf(”%d , %d”, turned + 2, turned + 3);

getchar();

} while (!isMoveOk(turned[2], turned[3], read, field, 1, turned));

displayField(field, 2, turned);

if (isPair(field, turned, &pairsLeft)) {

printf(”GEWONNEN!\n”);

getchar();

playerPairs[player]++;

} else {

printf(”nicht gewonnen =(\n”);

getchar();

if (player == 0) {

player = 1;

} else {

player = 0;

}

}

}

if (playerPairs[0] > playerPairs[1]) {

printf(”Spieler  1 hat gewonnen %d : %d.\n”

“Congratulations!!!\n”, playerPairs[0], playerPairs[1]);

} else if (playerPairs[1] > playerPairs[0]) {

printf(”Spieler 2 hat gewonnen %d : %d.\n”

“Well done!!!\n”, playerPairs[1], playerPairs[0]);

} else {

printf(”Unendschieden.\n”);

}

return 0;

}