编程练习，自己做的21点游戏

#include <stdio.h>
#include <time.h>
#include <stdlib.h>

int N; //牌序
int integral_player; //玩家积分
int integral_computer; //电脑积分

int card[52]= {102,103,104,105,106,107,108,109,110,111,112,113,114,202,203,204,205,206,207,208,209,210,211,212,213,214
               ,302,303,304,305,306,307,308,309,310,311,312,313,314,402,403,404,405,406,407,408,409,410,411,412,413,414,
              };
int player1[10]= {0,};
int player2[10]= {0,};
int player1_card=0;
int player2_card=0;

void show_cards(int i); //示牌
void riffle(); //洗牌
void Send_cards(); //发牌
void add_player(); //玩家要牌
void add_computer(); //电脑要牌
void cal_point(); //计算点数
void integral_read(); //积分读取，显示
void integral_write(); //积分写入

int main()
{
    char choose;
    integral_read(); //积分读取
    do
    {
        //printf("洗牌測试 \n");
        riffle(); //洗牌
        Send_cards(); //发牌
        add_player(); //玩家要牌
        add_computer(); //电脑要牌
        cal_point(); //计算点数
        integral_write(); //积分写入

        printf("******************* SUCCESS ***********************\n");
        printf("按 N 退出，其它键继续....\n\n");
        fflush(stdin);
        choose=getchar();
        printf("\n");
    }
    while (choose !='n'&&choose!='N');
    return 0;

}

void riffle()
{
    int a,t,i;
    srand(time(0));
    /*for (i=0; i<52; i++)
    {
        if (i%13==0)
        {
            printf("\n\n");
        }
        show_cards(i);
    }
    printf("\n\n");

    printf("上面是正常牌序，后面是洗牌后的牌序\n"); //洗牌測试*/

    for (i=0; i<52; i++)
    {
        a=rand()%52;
        t=card[i];
        card[i]=card[a];
        card[a]=t;
    }

    N=0; //牌序重置；
    player1_card=0; //玩家牌序重置。
    player2_card=0; //电脑牌序重置；

    /*for (i=0; i<52; i++) //洗牌測试
    {
        if (i%13==0)
        {
            printf("\n\n");
        }
        show_cards(i);
    }
    printf("\n\n");*/
}

void Send_cards()
{
    int j;
    printf("玩家拿牌:");
    for (j=0; j<2; j++)
    {
        show_cards(N);
        player1[player1_card]=card[N];
        player1_card++;
        N++;
    }
    printf("\n\n");

    printf("电脑拿牌:");
    for (j=0; j<2; j++)
    {
        show_cards(N);
        player2[player2_card]=card[N];
        player2_card++;
        N++;
    }
    printf("\n\n");
}

void show_cards(int i)
{
    int choose;
    choose=card[i]/100;
    switch (choose)
    {
    case 1:
        if (card[i]%100==14)
        {
            printf("SA\t");
            break;
        }
        else if (card[i]%100==13)
        {
            printf("SK\t");
            break;
        }
        else if (card[i]%100==12)
        {
            printf("SQ\t");
            break;
        }
        else if (card[i]%100==11)
        {
            printf("SJ\t");
            break;
        }
        else
        {
            printf("S%d\t",card[i]%100);
            break;
        }
    case 2:
        if (card[i]%100==14)
        {
            printf("DA\t");
            break;
        }
        else if (card[i]%100==13)
        {
            printf("DK\t");
            break;
        }
        else if (card[N]%100==12)
        {
            printf("DQ\t");
            break;
        }
        else if (card[i]%100==11)
        {
            printf("DJ\t");
            break;
        }
        else
        {
            printf("D%d\t",card[i]%100);
            break;
        }
    case 3:
        if (card[i]%100==14)
        {
            printf("CA\t");
            break;
        }
        else if (card[i]%100==13)
        {
            printf("CK\t");
            break;
        }
        else if (card[i]%100==12)
        {
            printf("CQ\t");
            break;
        }
        else if (card[i]%100==11)
        {
            printf("CJ\t");
            break;
        }
        else
        {
            printf("C%d\t",card[i]%100);
            break;
        }
    case 4:
        if (card[N]%100==14)
        {
            printf("HA\t");
            break;
        }
        else if (card[N]%100==13)
        {
            printf("HK\t");
            break;
        }
        else if (card[N]%100==12)
        {
            printf("HQ\t");
            break;
        }
        else if (card[i]%100==11)
        {
            printf("HJ\t");
            break;
        }
        else
        {
            printf("H%d\t",card[i]%100);
            break;
        }
    }
}

void add_player()
{
    int choose;
    do
    {
        printf("玩家: 1.要牌 2.不要\040");
        scanf("%d",&choose);
        switch (choose)
        {
        case 1:
            show_cards(N);
            player1[player1_card]=card[N];
            player1_card++;
            N++;
            printf("\n");
            continue;
        case 2:
            printf("不要\n");
            return;
        }
    }
    while (1);
}

void add_computer()
{
    int i;
    while (1)
    {
        int choose=2;
        int point=0;

        for (i=0; i<player2_card; i++)
        {
            point+=player2[i]%100;
        }
        if (point<=18)
        {
            choose=1;
        }

        printf("电脑：1.要牌 2.不要\n");
        switch (choose)
        {
        case 1:
            printf("要一张\n");
            show_cards(N);
            player2[player2_card]=card[N];
            player2_card++;
            N++;
            printf("\n");
            continue;
        case 2:
            printf("不要\n");
            return;
        }
    }
}

void cal_point()
{
    int winner1;
    int winner2;
    int i;
    int point1;
    int point2;
    int point;
    point1=0;
    point2=0;
    for (i=0; i<player1_card; i++)
    {
        point=player1[i]%100;
        switch(point)
        {
        case 14:
            point=11;
            break;
        case 13:
            point=10;
            break;
        case 12:
            point=10;
            break;
        case 11:
            point=10;
            break;
        case 10:
            point=10;;
            break;
        default :
            point=player1[i]%100;
            break;
        }
        point1+=point;
    }
    for (i=0; i<player2_card; i++)
    {
        point=player2[i]%100;
        switch(point)
        {
        case 14:
            point=11;
            break;
        case 13:
            point=10;
            break;
        case 12:
            point=10;
            break;
        case 11:
            point=10;
            break;
        case 10:
            point=10;;
            break;
        default :
            point=player2[i]%100;
            break;
        }
        point2+=point;

    }

    printf("玩家的点数为：%d\t",point1);
    printf("电脑的点数为: %d\n\n",point2);

    if (point1>21)
    {
        printf("玩家爆掉\n\n");
        winner1=0;
    }
    else
        winner1=1;
    if (point2>21)
    {
        printf("电脑爆掉\n\n");
        winner2=0;
    }
    else
        winner2=1;

    if (winner1>winner2){
        printf("玩家胜，得1分\n\n");
        integral_player++;
        return;
    }
    else if((winner1=winner2==1)){
        if (point1>point2){
            printf("玩家胜。得1分\n\n");
        integral_player++;
        return;
        }
        else{
            printf("电脑胜，得1分\n\n");
        integral_computer++;
        return;
        }
    }
    else if ((winner1=winner2==0)){
        printf("电脑胜，得1分\n\n");
        integral_computer++;
        return;
    }
    else if (winner1<winner2){
        printf("电脑胜。得1分\n\n");
        integral_computer++;
        return;
        }
    else
        return;
}

void integral_read()
{
    FILE *fp;
    if ((fp=fopen("integral.txt","r"))==NULL)
    {
        printf("integral file cannot open!");
        exit(0);
    }
    fscanf(fp,"%d %d",&integral_player,&integral_computer); //读入积分
    fclose(fp);
    printf("玩家一共%d胜 %d败\n\n",integral_player,integral_computer);
}

void integral_write()
{
    FILE *p;
    if ((p=fopen("integral.txt", "w"))==NULL)
    {
        printf("integral.txt file cannot open!");
        exit(0);
    }
    fprintf(p,"%d %d",integral_player,integral_computer);
    fclose(p);
}

还有不完好的地方

比方 A仅仅能作为11使用 不能看情况做1 计算

假设2个牌同样 不算豹子

下次继续改进