C语言如何实现ATM机存取款系统
C语言利用结构体和构造函数并且采用输入输出文件实现ATM机系统。下面是小编为大家带来的关于C语言如何实现ATM机存取款系统的知识，欢迎阅读。
C语言如何实现ATM机存取款系统
利用结构体和构造函数并且采用输入输出文件实现ATM机系统。
主要功能有：
利用三种方法查询、开户、登陆、菜单、取款、修改密码、存款、转账、创建个人信息、输出、删除、增加、退出。是一个功能齐全，完备的ATM机系统。
#include
#include
#include
struct per /pic/p>
{
char name[20];
char ID[20];
int money;
char mima[6];
struct per * next;
};
typedef struct person /pic/p>
{
struct per kehu;
struct person *next;
}L;
void chaxun(struct per *head); /pic/p>
void kaihu(struct per *head);
void denglu(struct per *head);
void caidan(struct per *head);
void qukuan(struct per *head);
void xgmm(struct per *head);
void cunkuan(struct per *head);
void zhuanzhang(struct per *head);
void chuangjian(struct person **Phead);
void shuchu(struct person *Phead);
void shanchu(struct person **Phead);
void zengjia(struct person **Phead);
void chaxun1(struct person *Phead);
void chaxun2(struct person *Phead);
void chaxun3(struct person *Phead);
void tuichu();
void menu();
/*主函数*/
/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/p>
void main()
{
char x;
char choose; /pic/p>
int flag=1;
struct person *Phead=NULL; /pic/p>
struct per *head=NULL; /pic/p>
printf("***************************** ");
printf("**欢迎使用ATM自动取款机系统** ");
printf("***************************** ");
printf("—————————————— ");
printf("| 1 开户 | ");
printf("—————————————— ");
printf("| 2 登陆 | ");
printf("—————————————— ");
printf("| 3 前台客户信息查询中心| ");
printf("—————————————— ");
printf("| 4 请选择您的需求 | ");
printf("—————————————— ");
scanf("%s",&x);
system("cls");
switch(x)
{
case '1':system("cls");
kaihu(head); /pic/p>
break;
case '2':system("cls");
denglu(head); /pic/p>
break;
case '3':system("cls");
menu(); /pic/p>
break;
}
while(flag)
{
system("cls");
menu(); /pic/p>
choose=get);
switch(choose)
{
case '1':chuangjian(&Phead);
shuchu(Phead); /pic/p>
system("pause");
system("cls");
break;
case '2':chaxun1(Phead); /pic/p>
system("pause");
system("cls");
break;
case '3':chaxun2(Phead); /pic/p>
system("pause");
system("cls");
break;
case '4':
chaxun3(Phead); /pic/p>
system("pause");
system("cls");
break;
case '5':shanchu(&Phead); /pic/p>
system("pause");
system("cls");
break;
case '6':
zengjia(&Phead); /pic/p>
system("pause");
system("cls");
break;
case '7':shuchu(Phead); /pic/p>
system("pause");
system("cls");
break;
case '8':shuchu(Phead);
system("pause");
system("cls");
break;
case '0':flag=0;
printf("The end. ");
break;
}
}
}
/*开户函数*/
/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/p>
void kaihu(struct per *head)
{
head=NULL;
FILE *fp; /pic/p>
struct per *p1=NULL,*p2=NULL; /pic/p>
p1=(struct per*)malloc(sizeof(struct per)); /pic/p>
printf("请输入您的姓名： "); /pic/p>
scanf("%s",p1->name);
printf("请设置您的卡号： ");
scanf("%s",p1->ID);
printf("请设置您银行卡密码： ");
scanf("%s",p1->mima);
p1->money=0;
p1->next=NULL;
printf("您的个人信息为");
printf("姓名：%s 卡号：%s 余额：%4d ",p1->name,p1->ID,p1->money);
if(NULL==head) /pic/p>
{
head=(struct per *)malloc(sizeof(struct per));
head->next=p1; /pic/p>
}
else /pic/p>
{
for(p2=head;p2->next!=NULL;p2=p2->next); /pic/p>
p2->next=p1;
}
if((fp=fopen("save.txt","ab+"))==NULL) /pic/p>
{
printf("cannot poen file ");
return;
}
if(fwrite(p1,sizeof(struct per),1,fp)!=1) /pic/p>
printf("file write error ");
fclose(fp);
printf(" ");
printf("恭喜您开户成功，请登录 ");
system("pause");
system("cls");
denglu(head);
}
/pic/p>
/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/
void denglu(struct per *head)
{
char d[20];
char mima[20];
int i,j;
FILE *fp; /pic/p>
struct per *p,*q=NULL;
if((fp=fopen("save.txt","rb+"))==NULL) /pic/p>
{
printf("不能打开文件 "); /pic/p>
}
p=(struct per*)malloc(sizeof(struct per)); /pic/p>
head=p;
while(!feof(fp)) /pic/p>
{
if(1!=fread(p,sizeof(struct per),1,fp))
break; /pic/p>
p->next=(struct per *)malloc(sizeof(struct per)); /pic/p>
q=p; /pic/p>
p=p->next; /pic/p>
}
q->next=NULL; /pic/p>
fclose(fp);
printf(" ********************** ");
printf(" ***欢迎来都建设银行*** ");
printf(" ********************** ");
for(j=1;j<4;j++) /pic/p>
{
printf("请输入您的卡号 ");
scanf("%s",d);
for(q=head;q!=NULL;q=q->next) /pic/p>
{
if(strcmp(q->ID,d)!=0) /pic/p>
{
continue; /pic/p>
}
else
{
for(i=1;i<4;i++) /pic/p>
{
printf(" 请输入您的密码 ");
scanf("%s",mima);
if(strcmp(q->mima,mima)!=0) /pic/p>
{
printf("密码不正确。请重新输入密码 ");
system("pause");
system("cls");
continue; /pic/p>
}
else
{
system("cls");
caidan(head); /pic/p>
}
}
printf(" 您输入密码三次错误，谢谢光临 ");
system("pause");
system("cls");
exit(0);
}
}
printf(" 您输入的卡号有误，请重试 ");
system("pause");
system("cls");
}
printf("您的卡号三次输入错误，谢谢使用 ");
exit(0);
}
/pic/p>
/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/
void caidan(struct per *head)
{
head=NULL;
int i; /pic/p>
while(1)
{
printf("请选择您需要的业务 "); /pic/p>
printf("********************************* ");
printf("** 1 取款 ***** 2 查询 ** ");
printf("********************************* ");
printf("** 3 转账 ***** 4 修改密码** ");
printf("********************************* ");
printf("** 5 存款 ***** 6 退出 ** ");
printf("********************************* ");
scanf("%d",&i);
if(i<6||i>0)
{
switch(i)
{
case 1:qukuan(head); /pic/p>
system("pause");
system("cls");
break;
case 2:system("cls");
chaxun(head); /pic/p>
break;
case 3:system("cls");
zhuanzhang(head); /pic/p>
break;
case 4:system("cls");
xgmm(head); /pic/p>
break;
case 5:system("cls");
cunkuan(head); /pic/p>
break;
case 6:system("cls");
tuichu(); /pic/p>
break;
}
}
else
{
printf("您的输入有误 ");
system("pause");
system("cls");
}
}
}
/pic/p>
/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/p>
void qukuan(struct per *head)
{
head=NULL; /pic/p>
int i;
FILE *fp; /pic/p>
struct per *p,*q=NULL;
if((fp=fopen("save.txt","rb+"))==NULL) /pic/p>
{
printf("不能打开文件 "); /pic/p>
}
p=(struct per*)malloc(sizeof(struct per)); /pic/p>
head=p;
while(!feof(fp)) /pic/p>
{
if(1!=fread(p,sizeof(struct per),1,fp))
break; /pic/p>
p->next=(struct per *)malloc(sizeof(struct per)); /pic/p>
q=p; /pic/p>
p=p->next; /pic/p>
}
q->next=NULL; /pic/p>
fclose(fp);
system("cls");
printf("************************************ ");
printf("** 1: 100元 ***** 2:200元 ** ");
printf("************************************ ");
printf("** 3: 300元 ***** 4:400元 ** ");
printf("************************************ ");
printf("** 5: 500元 ***** 6:600元 ** ");
printf("************************************ ");
printf("请按要求选择您要取款的金额 ");
scanf("%d",&i);
if(i>6||i<=0) /pic/p>
{
printf("对不起，您的输入有误 ");
return;
}
else
{
i=100*i; /pic/p>
if(i>q->money)
{
printf("对不起，您的金额不足 ");
system("pause");
system("cls");
caidan(head); /pic/p>
}
else
{
q->money-=i; /pic/p>
if((fp=fopen("save.txt","wb+"))==NULL) /pic/p>
{
printf("cannot open file ");
return;
}
if(fwrite(q,sizeof(struct per),1,fp)!=1) /pic/p>
printf("file write error ");
printf("您已经成功取走%d元 ");
q->next=NULL;
fclose(fp); /pic/p>
}
}
}
/pic/p>
/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/
void zhuanzhang(struct per *head)
{
head=NULL;
FILE *fp; /pic/p>
struct per *p,*q=NULL;
if((fp=fopen("save.txt","rb+"))==NULL) /pic/p>
{
printf("不能打开文件 "); /pic/p>
}
p=(struct per*)malloc(sizeof(struct per)); /pic/p>
head=p;
while(!feof(fp)) /pic/p>
{
if(1!=fread(p,sizeof(struct per),1,fp))
break; /pic/p>
p->next=(struct per *)malloc(sizeof(struct per)); /pic/p>
q=p; /pic/p>
p=p->next; /pic/p>
}
q->next=NULL; /pic/p>
fclose(fp);
int i,j,k;
printf("请输入帐号号码 ");
scanf("%d",&i);
printf("请再次输入帐号号码 "); /pic/p>
scanf("%d",&j);
if(i!=j)
{
printf("两次账号不同，请重新输入 ");
zhuanzhang(head);
}
else
{
system("cls");
printf("************************************ ");
printf("** 1: 100元 ***** 2:200元 ** ");
printf("************************************ ");
printf("** 3: 300元 ***** 4:400元 ** ");
printf("************************************ ");
printf("** 5: 500元 ***** 6:600元 ** ");
printf("************************************ ");
printf("请输入转账金额 ");
scanf("%d",&k);
if(k>6||k<=0)
{
printf("对不起，您的输入有误 ");
return;
}
else
{
k=k*100;
if(k>q->money) /pic/p>
{
printf("对不起，您的余额不足 ");
system("pause");
system("cls");
caidan(head);
}
else
{
printf("您已成功转账%d元 ",k);
q->money-=k;
if((fp=fopen("save.txt","wb+"))==NULL)
{
printf("cannot open file ");
return;
}
if(fwrite(q,sizeof(per),1,fp)!=1) /pic/p>
printf("file write error ");
q->next=NULL;
fclose(fp);
system("pause");
system("cls");
}
}
}
}
/pic/p>
/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/
void chaxun(struct per *head)
{
head=NULL; /pic/p>
FILE *fp; /pic/p>
struct per *p,*q=NULL;
if((fp=fopen("save.txt","rb+"))==NULL) /pic/p>
{
printf("不能打开文件 "); /pic/p>
}
p=(struct per*)malloc(sizeof(struct per)); /pic/p>
head=p;
while(!feof(fp)) /pic/p>
{
if(1!=fread(p,sizeof(struct per),1,fp))
break; /pic/p>
p->next=(struct per *)malloc(sizeof(struct per)); /pic/p>
q=p; /pic/p>
p=p->next; /pic/p>
}
q->next=NULL; /pic/p>
fclose(fp);
printf("您卡上原有余额%d元 ",q->money);
system("pause");
system("cls");
}
/pic/p>
/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/p>
void xgmm(struct per *head)
{
head=NULL; /pic/p>
char mima[20];
FILE *fp; /pic/p>
struct per *p,*q=NULL;
if((fp=fopen("save.txt","rb+"))==NULL) /pic/p>
{
printf("不能打开文件 "); /pic/p>
}
p=(struct per*)malloc(sizeof(struct per)); /pic/p>
head=p;
while(!feof(fp)) /pic/p>
{
if(1!=fread(p,sizeof(struct per),1,fp))
break; /pic/p>
p->next=(struct per *)malloc(sizeof(struct per)); /pic/p>
q=p; /pic/p>
p=p->next; /pic/p>
}
q->next=NULL; /pic/p>
fclose(fp);
printf("请输入您的原密码 ");
scanf("%s",mima);
if(strcmp(q->mima,mima)==0) /pic/p>
{
{
printf("密码正确 ");
printf("请输入您的`新密码: ");
scanf("%s",q->mima);
if((fp=fopen("save.txt","wb+"))==NULL) /pic/p>
{
printf("cannot open file ");
}
if(fwrite(q,sizeof(struct per),1,fp)!=1) /pic/p>
printf("file write error ");
fclose(fp);
printf("修改密码成功 ");
}
}
else
{
printf("您输入的密码与原密码不同 ");
return;
system("pause");
}
q->next=NULL;
}
/pic/p>
/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/p>
void cunkuan(struct per *head)
{
int i;
head=NULL; /pic/p>
FILE *fp; /pic/p>
struct per *p,*q=NULL;
if((fp=fopen("save.txt","rb+"))==NULL) /pic/p>
{
printf("不能打开文件 "); /pic/p>
}
p=(struct per*)malloc(sizeof(struct per)); /pic/p>
head=p;
while(!feof(fp)) /pic/p>
{
if(1!=fread(p,sizeof(struct per),1,fp))
break; /pic/p>
p->next=(struct per *)malloc(sizeof(struct per)); /pic/p>
q=p; /pic/p>
p=p->next; /pic/p>
}
q->next=NULL; /pic/p>
fclose(fp);
system("cls");
printf("您卡上原有余额%d元 ",q->money);
printf("************************************ ");
printf("** 1: 100元 ***** 2:200元 ** ");
printf("************************************ ");
printf("** 3: 300元 ***** 4:400元 ** ");
printf("************************************ ");
printf("** 5: 500元 ***** 6:600元 ** ");
printf("************************************ ");
printf("请选择您要存入的余额 ");
scanf("%d",&i);
if(i>6||i<=0)
{
printf("对不起，您的输入有误 ");
return;
}
else
{
i=100*i;
q->money+=i;
if((fp=fopen("save.txt","wb+"))==NULL) /pic/p>
{
printf("cannot open file ");
}
if(fwrite(q,sizeof(struct per),1,fp)!=1) /pic/p>
printf("file write error ");
printf("您已经成功存取%d元 ",i);
q->next=NULL;
fclose(fp);
system("pause");
system("cls");
}
}
/pic/p>
/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/
void tuichu()
{
printf("谢谢使用 ");
exit(0);
}
/pic/p>
/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/
void menu()
{
printf("****************欢迎来到建设银行取款机系统**************** ");
printf("************************************************** ");
printf("**** 1 建立信息并显示 ****** 2 卡号查询信息 **** ");
printf("************************************************** ");
printf("**** 3 姓名查询信息 ****** 4 余额查询信息 **** ");
printf("************************************************** ");
printf("**** 5 删除某卡号信息 ****** 6 增加新的用户 **** ");
printf("************************************************** ");
printf("**** 7 按余额降序输出 ****** 8 输出 **** ");
printf("************************************************** ");
printf("**** 0 退出 ****** 谢谢光临 **** ");
printf("************************************************** ");
printf("请选择您需要的业务 ");
}
/pic/p>
/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/p>
void chuangjian(struct person **Phead) /pic/p>
{
struct person *p,*t; /pic/p>
char n[20];
char a[20];
int s;
if(*Phead) *Phead=NULL;
printf("请输入卡号 姓名 余额 (若要结束请输入三个为零) ");
printf("请输入卡号 ");
scanf("%s",n);
printf("请输入姓名 ");
scanf("%s",a);
printf("请输入预存金额 ");
scanf("%d",&s);
if(s==0) return;
p=(L *)malloc(sizeof(L)); /pic/p>
strcpy(p->kehu.ID,n);
strcpy(p->kehu.name,a);
*Phead=p; /pic/p>
printf("请输入卡号 ");
scanf("%s",n);
printf("请输入姓名 ");
scanf("%s",a);
printf("请输入预存金额 ");
scanf("%d",&s);
while(s)
{
t=p; /pic/p>
p=(L *)malloc(sizeof(L)); /pic/p>
strcpy(p->kehu.ID,n);
strcpy(p->kehu.name,a);
p->kehu.money=s;
p->next=NULL;
t->next=p; /pic/p>
printf("请输入卡号 "); /pic/p>
scanf("%s",n);
printf("请输入姓名 ");
scanf("%s",a);
printf("请输入预存金额 ");
scanf("%d",&s);
}
}
/pic/p>
/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/
void shuchu(struct person *Phead)
{
printf(" ");
if(NULL==Phead)
{
printf("没有客户信息可输出! "); /pic/p>
return;
}
while(Phead) /pic/p>
{
printf("卡号:%s 姓名: 余额:%d ",Phead->kehu.ID,Phead->kehu.name,Phead->kehu.money);
Phead=Phead->next;
}
printf(" ");
}
/pic/p>
/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/
void chaxun1(struct person*Phead)
{
char m[20]; /pic/p>
if(NULL==Phead) /pic/p>
{
printf("没有客户信息可查询! ");
return;
}
printf("请输入要查询的客户卡号： ");
scanf("%s",m);
while(NULL!=Phead&&strcmp(Phead->kehu.ID,m)!=0) /pic/p>
Phead=Phead->next;
if(Phead==NULL) /pic/p>
printf("对不起，没有该用户! ");
else
printf("卡号:%s 姓名: 余额:%d ",Phead->kehu.ID,Phead->kehu.name,Phead->kehu.money);
} /pic/p>
/pic/p>
/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/
void chaxun2(struct person *Phead)
{
char m[20]; /pic/p>
if(NULL==Phead) /pic/p>
{
printf("没有客户信息可查询! ");
return;
}
printf("请输入要查询的客户姓名： ");
scanf("%s",m);
while(NULL!=Phead&&strcmp(Phead->kehu.name,m)!=0) /pic/p>
Phead=Phead->next;
if(Phead==NULL) /pic/p>
printf("对不起，没有该用户! ");
else
printf("卡号:%s 姓名: 余额:%d ",Phead->kehu.ID,Phead->kehu.name,Phead->kehu.money);
} /pic/p>
/pic/p>
/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/
void chaxun3(struct person *Phead)
{
long x; /pic/p>
if(NULL==Phead) /pic/p>
{
printf("没有客户信息可查询! ");
return;
}
printf("请输入要查询的客户信息的余额： ");
scanf("%ld",&x);
while(NULL!=Phead&&Phead->kehu.money!=x) /pic/p>
Phead=Phead->next;
if(Phead==NULL) /pic/p>
printf("对不起，没有该用户! ");
else
printf("该客户的信息为 ");
printf("卡号:%s 姓名: 余额:%d ",Phead->kehu.ID,Phead->kehu.name,Phead->kehu.money);
} /pic/p>
/pic/p>
/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/
void shanchu(struct person **Phead) /pic/p>
{
char k[20]; /pic/p>
struct person *p=*Phead,*t;
if(NULL==(*Phead)) /pic/p>
{
printf("没有客户信息可删除! ");
return;
}
printf("请输入要删除的客户卡号： ");
scanf("%s",k);
if(p->kehu.ID==k) /pic/p>
*Phead=(*Phead)->next,free(p);
else
{
while(NULL==p->next&&p->next->kehu.ID!=k) /pic/p>
p=p->next; /pic/p>
if(p->next==NULL)
printf("对不起，没有该客户! ");
else
{
t=p->next; /pic/p>
p->next=p->next->next;
}
}
}
/pic/p>
/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/p>
void zengjia(struct person **Phead) /pic/p>
{
char n[20]; /pic/p>
char a[20]; /pic/p>
int s;
L *p,*t,*k; /pic/p>
printf("请输入要插入的客户信息 ");
printf("请输入卡号 "); /pic/p>
scanf("%s",&n);
printf("请输入姓名 ");
scanf("%s",a);
printf("请输入预存金额 ");
scanf("%d",&s);
p=(L *)malloc(sizeof(L)); /pic/p>
strcpy(p->kehu.ID,a); /pic/p>
p->kehu.money=s;
strcpy(p->kehu.name,n);
if(NULL==(*Phead)) /pic/p>
{
*Phead=p; /pic/p>
(*Phead)->next=NULL;
return ;
}
else
{
p->next=(*Phead); /pic/p>
(*Phead)=p;
}
}
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