https://blog.csdn.net/niu_gao/article/details/51458721

在內存中模擬出一副牌，然后模擬洗牌，發牌等動作。

流程是這樣的：構建一副牌保存到一個數組中—洗牌—創建玩家—向玩家發牌–輸出每個玩家的牌。

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
//定義撲克的花色
enum Suit{heart,spade,diamond,club,joker1,joker2
};
//一副牌的數量
#define CARD_COUNT 54
//定義撲克
typedef struct Card{int value;//牌的點數從1開始enum Suit suit;//花色
}Card;
//定義玩家
typedef struct Player{char name[64];//玩家的名字Card ** cards;//玩家分到的牌。每項是一個指針，指向原始一副牌數組中的一項，這樣可以節省空間int cardsCount;//玩家分到的牌的數量
}Player;
//分牌完成后調用的函數的類型
typedef int (*COMPARE)(Card* ,Card*);
//函數聲明們
char* getCardName(const Card*);
Card** shuffle(const Card*);
void dispatchCards(Player** ,int ,const Card** );
void sort(Card**,int,COMPARE);
int compare1(Card* ,Card*);
int compare2(Card* ,Card*);
void initOnePack();
//原始一副牌所在的數組
Card pokers[CARD_COUNT];
//入口函數
int main(void)
{//初始化一副牌initOnePack();//洗牌，shuffledPokers保存洗后的牌們Card** shuffledPokers = shuffle(pokers);//構建三個玩家Player player1;strcpy(player1.name,"隔壁老王");player1.cards=NULL;player1.cardsCount=0;Player player2;strcpy(player2.name,"小明");player2.cards=NULL;player2.cardsCount=0;Player player3;strcpy(player3.name,"田中龜孫");player3.cards=NULL;player3.cardsCount=0;//把三放到一個數組中，以傳入發牌函數中Player* players[]={&player1,&player2,&player3};//發牌dispatchCards(players,sizeof(players)/sizeof(Player*),shuffledPokers);//洗后的牌用完了，釋放之free(shuffledPokers);int i;//打印出每個玩家手中的牌for(i=0;i<sizeof(players)/sizeof(Player*);i++){//先打印玩家的名字printf("%s\n",players[i]->name);//需要對玩家手中的牌排序sort(players[i]->cards,players[i]->cardsCount,compare1);//打印玩家手中所有的牌int j;for(j=0;j<players[i]->cardsCount;j++){char * name = getCardName(players[i]->cards[j]);printf("%s ",name);free(name);}//每個玩家都需要換一次行printf("\n");}//釋放玩家手中牌的數組for(i=0;i<sizeof(players)/sizeof(Player*);i++){free(players[i]->cards);}return 0;
}
//構造一副牌
void initOnePack(){int i=0;//前52張for(;i<CARD_COUNT-2;i++){pokers[i].value=i/4+1;pokers[i].suit = i%4;}//剩下的兩張：大王和小王//joker1pokers[i].value=i/4+1;pokers[i].suit=joker1;//joker2pokers[i+1].value=i/4+2;pokers[i+1].suit=joker2;
}
//洗牌，參數是原始的一副牌，返回洗完后的牌
Card** shuffle(const Card* pokers){int i;//分牌返回牌數組的內存空間Card** retPokers = malloc(CARD_COUNT*sizeof(Card*));//為了不改動原始的一副牌，另建一個數組，保存原始牌的指針（注意每項不是牌，而是牌的指針）Card** pokers2 = malloc(CARD_COUNT*sizeof(Card*));for(i=0;i<CARD_COUNT;i++){pokers2[i] = &pokers[i];}//種下隨機種子。種子取的是當前時間，//所以保證了每次運行程序時，產生的隨機數序列不同srand(time(NULL));//取得隨機序號，從pokers2取出序號所指的項，把它依次加到retPokers中。for(i=0;i<CARD_COUNT;i++){unsigned int index = rand()%CARD_COUNT;if(pokers2[index] != NULL){retPokers[i] = pokers2[index];pokers2[index]=NULL;}else{i--;}}free(pokers2);//返回洗完后的數組return retPokers;
}
//發牌
//players是玩家數組
//playerCount是玩家數量
//shuffledCards是洗完后的一副牌
void dispatchCards(Player** players,int playerCount,const Card** shuffledCards){//計算每個玩家手中牌的數組的容量，如果每個玩家手中的牌不一樣，//最多就差一張，加1是為了保證數組分配的空間足夠容納分到的牌。int numberCards = CARD_COUNT/playerCount+1;//為每個玩家的牌數組分配空間int i;for(i=0;i<playerCount;i++){Card* cards = malloc(numberCards*sizeof(Card*));players[i]->cards = cards;}//輪流向每個玩家發牌for(i=0;i<CARD_COUNT;i++){//取當前玩家Player *curPlayer = players[i%playerCount];//向玩家發牌curPlayer->cards[curPlayer->cardsCount] = shuffledCards[i];//玩家手中實際的牌數增加curPlayer->cardsCount++;}
}
//排序函數
//cards是要排序的牌，每一項是牌的指針
//cardsCount是牌的數量
//compare_func是比較函數
void sort(Card** cards,int cardsCount,COMPARE compare_func){int i;for(i=0;i<cardsCount-1;i++){int j;for(j=0;j<cardsCount-i-1;j++){if(compare_func(cards[j],cards[j+1])){int tmp=cards[j];cards[j]=cards[j+1];cards[j+1]=tmp;}}}
}
//比較函數，先比較點數再比較花色
int compare1(Card* a,Card* b){if(a->value > b->value){return 1;}else if(a->value < b->value){return 0;}else{if(a->suit > b->suit)return 1;elsereturn 0;}
}
//比較函數，先比較點數再比較花色
int compare2(Card* a,Card* b){if(a->value > b->value){return 0;}else if(a->value < b->value){return 1;}else{if(a->suit > b->suit)return 0;elsereturn 1;}
}
//獲取牌的名字
//返回牌的名字字符串，調用者用完后需要free()之。
char* getCardName(const Card* card){//存放花色名字char suitStr[16]={0};//0=='\0'switch (card->suit) {case heart:strcpy(suitStr,"紅桃");break;case spade:strcpy(suitStr,"黑桃");break;case diamond:strcpy(suitStr,"方塊");break;case club:strcpy(suitStr,"梅花");break;}//存放點數名字char valueStr[16];switch(card->value){case 1:strcpy(valueStr,"A");break;case 11:strcpy(valueStr,"J");break;case 12:strcpy(valueStr,"Q");break;case 13:strcpy(valueStr,"K");break;case 14:strcpy(valueStr,"小王");break;case 15:strcpy(valueStr,"大王");break;default:sprintf(valueStr,"%d",card->value);break;}//動態分配足夠的空間char * ret = malloc(16);//將兩個名字合并到ret中sprintf(ret,"%s%s",suitStr,valueStr);return ret;
}