21dot.c

typedef struct Cards
{
	int face;
	char* suit;
} Card;

char spade[5];
char heart[5];
char diamond[7];
char club[4];

strcpy(spade, "spade");
strcpy(heart, "heart");
strcpy(diamond, "diamond");
strcpy(club, "club");

int main(){
	int cards[52];
	Card* aicards[10];
	Card* usercards[10];
	char input[5];
	int aipicktimes = 0, userpicktimes = 0;
	for(i=0; i<10; i++){
		aicards[i] = NULL;
		usercards[i] = NULL;
	}
	srand(time(NULL));
	for(i=0; i<52; i++){
		cards[i] = 0;
	}
	for(aipicktimes; aipicktimes<2; aipicktimes++){
		aicards[aipicktimes] = output(cards);
	}
	for(userpicktimes; userpicktimes<2; userpicktimes++){
		usercards[i] = output(cards);
	}
	//print
	printf("%d %s", aicards[0]->face, aicards[0]->suit);
	//Hit or Stand
	while(1){
		scanf("%s", input);
		if( strcmp(input, "Hit") == 0){
			usercards[++userpicktimes] = output(cards);
			if( face_sum(aicards) < 17 ){
				aicards[++aipicktimes] = output(cards);
			}
			//print
			if( face_sum(usercards) > 21 ||  face_sum(aicards) > 21){
				break;
			}	
		}
		else if( strcmp(input, "Stand") == 0){
			if( face_sum(aicards) < 17 ){
				aicards[++aipicktimes] = output(cards);
			}
			else{
				break;
			}
			//print
			if( face_sum(usercards) > 21 ||  face_sum(aicards) > 21){
				break;
			}
		}
		else{
			//print error
		}
	}
	int aisum = face_sum(aicards), usersum = face_sum(usercards);
	if( usersum > 21 &&  aisum > 21){
		//print ai win
	}
	else if( usersum > 21 ){
		//print ai win
	}
	else if( aisum > 21 ){
		//print user win
	}
	else if( usersum > aisum ){
		//print user win
	}
	else if( usersum < aisum ){
		//print ai win
	}
	else if( usersum == aisum ){
		//draw
	}
}

Card* output(int* cards){
	int randnum;
	do{
		randnum = rand()%52;
	}while( cards[randnum] == 1)
	cards[randnum] = 1;
	Card *card = malloc(sizeof(Card));
	card->face = num%13+1;//數字1~13
	switch(num/13){
		case 0:
			card->suit = spade;
			break;
		case 1:
			card->suit = heart;
			break;
		case 2:
			card->suit = diamond;
			break;
		case 3:
			card->suit = club;
			break;
	}
	return card;
}

int face_sum(Card** cardget){
	int i = 0, sum = 0, face;
	while( cardget[i] != NULL){
		face = cardget[i]->face;
		if( face > 1 && face < 11){
			sum = sum + face;
		}
		else if( face >= 11){
			sum = sum + 10;
		}
		else{ //face == 1
			if( sum + 11 > 21){
				sum = sum + 1;
			}
			else{
				sum = sum + 11;
			}
		}
	}
	return sum;
}