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("洗牌测试 \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，其他键继续....\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"); //洗牌测试*/

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++) //洗牌测试
{
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
;
player1_card++;
N++;
}
printf("\n\n");

printf("电脑拿牌:");
for (j=0; j<2; j++)
{
show_cards(N);
player2[player2_card]=card
;
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
%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
%100==14)
{
printf("HA\t");
break;
}
else if (card
%100==13)
{
printf("HK\t");
break;
}
else if (card
%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
;
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
;
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);
}