21点游戏编程.docx

1、21点游戏编程/* Filename: This program plays a game of Blackjack with you. The computer is the dealer and you are the victim-er, I mean player. The dealer gets a card that you can see. The dealer then asks if you want another card by asking “Hit” or “Stand.” If you choose to hit, the dealer gives you anot

2、her card. If you choose to stand, the dealer draws or stands, and the game is played out according to the cards you and the dealer have. As with real Blackjack, the dealer stands on 17. The winner is announced only after both the players and the dealers hands are finished.*/*ANSI C standard header f

3、iles appear next */#include #include #include #include /*Defined constants appear next */#define BELL a#define DEALER 0#define PLAYER 1/* Must keep two sets of totals for dealer and for player. The first set counts Aces as 1 and the second counts Aces as “real world” Blackjack, this program doesnt a

4、llow some Aces to be 1 while others Aces are 11 in the same hand.*/#define ACELOW 0#define ACEHIGH 1/* Only one global variable is used in this entire program. The variable holds 0, which means false initially. Once the user enters his or her name in initCardsScreen (), this variable is set to 1 (fo

5、r true), so the name is never asked for again the rest of the program.*/*This programs specific prototypes */void dispTitle(void);void initCardsScreen(int cards52,int playerPoints2,int dealerPoints2,int total2,int * numCards);int dealCard(int * numCards, int cards52);void dispCard(int cardDrawn,int

6、points2);void totalIt(int points2,int total2,int who);void dealerGetsCard(int *numCards,int cards52,int dealerPoints2);char getans(char mesg);void findWinner(int total2);/*Cs program execution always begins at main() here */Main()int numCards; /* Equals 52 at beginning of each game */int cards52,pla

7、yerPoints2,dealerPoints2,total2;char ans; /* For users Hit/Stand or Yes/No response */do initCardsScreen(cards,playerPoints,dealerPoints,total,&numCards);dealerGetsCard(&numCards,cards,dealerPoints);printf(“n”); /* Prints a blank line */playerGetsCard(&numCards,cards,playerPoints);playerGetsCard(&nu

8、mCards,cards,playerPoints);do ans = getAns(“Hit or stand (H/S)? ”);if (ans = H) playerGetsCard(&numCards,cards,playerPoints); while (ans != S)totalIt(playerPoints,total,PLAYER);/* Players total */Do dealerGetsCard(&numCards,cards,dealerPoints); while (dealerPointsACEHIGH 17);/* 17: Dealer stops */to

9、talIt(dealerPoints,total,DEALER);/*第296页*/*Dealers total*/findWinner(total);ans = getAns(“nPlay again (Y/N)? “); while (ans =Y);retutn;/*This function initializes the face values of the deck of cards by putting four sets of 1-13 in the 52-card clears the screen and displays a title. */void initCards

10、Screen (int cards52,int playerPoints2,int dealerPoints2, int total2, int *numCards)int sub, val = 1; /*This functions Work variables */char firstName15; /*Holds users first name */*numCards = 52; /*holds running total of number of cards */For (sub = 0; sub = 51; sub+) /* Counts from 0 to 51 */val =

11、(val = 14) ? 1:val; /* If val is 14, reset to 1 */cardssub = val;val+; for (sub = 0;sub 21) totalwho = pointsACELOW; /* Keeps all Aces as 1 */else totalwho = pointsACEHIGH; /* Keeps all Aces as 11 */if (who = PLAYER) /* Determines the message printed */ printf(“You have a total of %dnn”, totalPLAYER

12、); else printf(“The house stands with a total of %dnn”, totalDEALER); return;/*Prints the winning player. */void findWinner(int total2)if (totalDEALER = 21) printf(“The house wins.n”); return;if (totalDEALER 21) & (totalPLAYER 21) printf(“%s”, “Nobody wins.n”); return;if (totalDEALER=totalPLAYER)&(t

13、otalDEALER 21) & (totalDEALER 21) printf(“The house wins.n”); return;printf(“%s%c”, “You win!n”, BELL); return;/*Gets the uses uppercase, single-character response. */char getAns(char mesg)char ans;printf(“%s”, mesg); /* Prints the prompt message passed */ans = getchar();getchar(); /* Discards newli

14、ne. You can safely */ /* ignore compiler warning here. */return toupper(ans);/*Clears everything off the screen. */void dispTitle(void)int i = 0;while (i25) /* Clears screen by printing 25 blank */ printf(“n”); /* lines to “push off” stuff that */i+; /* might be left over on the screen */ /* before this program */printf(“nn*Step right up to the Blackjack tables*nn”);return;（完）