（C语言）模拟ATM存款、取款、查询余额、转账等操作

#include<stdio.h>
#include<stdlib.h>
void printvouchers()
{
 int y;
 printf("是否需要打印凭证：\n1、是\n2、否\n");
 scanf("%d", &y);
 if (y == 1)printf("已打印凭证\n");
}
void judge(int passport, int *PASSPORT)
{
 int i;
 for (i=1;passport != *PASSPORT;i )
 {
  if (i <= 3) { printf("重新输入"); scanf("%6d", &passport); }
  else {
   printf("输入密码错误超过三次，24小时之内不能进行任何操作"); exit(0);
  }
 }
}
void PASSPORTRESET(int *PASSPORT)
{
 printf("请输入原密码");
 int passport, newpassport1, newpassport2;
 scanf("%6d", &passport);
 judge(passport, PASSPORT);
  loop : printf("请输入新密码");
 scanf("%6d", &newpassport1);
 printf("请再次输入新密码");
 scanf("%6d", &newpassport2);
 if (newpassport1 == newpassport2)
 {
  printf("修改成功");
  *PASSPORT = newpassport1;
 }
 else goto loop;
}
void Balancecheck(double *Balance)
{
 printf("%lf\n", *Balance);
}

void deposit(double *Balance,double b)
{
 double input1;
 printf("请塞入纸币");
 scanf("%lf", &input1);
 if (input1 <= 10000)
 {
  
  *Balance =b input1;
  printvouchers();
 }
 else printf("您的现金过多，已退回\n");
}
void withdraw(double *Balance, double b)
{
 double input2;
 for (;;)
 {
  printf("请输入取款金额");
  scanf("%lf", &input2);
  if (input2 <= 5000&&input2>=100)
  {
   if (input2 <= *Balance)
   {
    printf("取款成功");
    *Balance = b - input2;
    printvouchers();
    break;
   }
   else { printf("您的余额不足\n"); break; }
  }
  if (input2 < 100) { printf("取款需大于一百\n"); continue; }
  if (input2 > 5000) { printf("取款数过多\n"); continue; }
 }
}
void enterpassport(int *PASSPORT)
{
 int passport;
 printf("请输入密码");
 scanf("%d", &passport);
 judge(passport,PASSPORT);
}
void transfer(double *Balance,double b)
{
 double input3;
 long long t;
 printf("请输入卡号");
 scanf("%ld", &t);
 printf("请输入转账金额");
 scanf("%lf", &input3);
  if (input3 <= 50000)
  {
   printf("转账成功");
   *Balance = b - input3;
   printvouchers();
  }
  else printf("转账金额过多，请至柜台办理");
}
int main()
{
 int x, *PASSPORT,a=123456;
 PASSPORT = &a;
 double *Balance,b=10000.00;
 Balance = &b;
 for(;;)
 {
  printf("请选择要办理的业务：\n1、修改密码\n2、查询余额\n3、存款\n4、取款\n5、转账\n6、退卡\n");
  scanf("%d",&x);
  switch (x)
  {
  case 1:PASSPORTRESET(PASSPORT); break;
  case 2:Balancecheck(Balance); break;
  case 3:enterpassport(PASSPORT); deposit(Balance, b);  break;
  case 4:enterpassport(PASSPORT); withdraw(Balance, b);  break;
  case 5:enterpassport(PASSPORT); transfer(Balance, b);  break;
  case 6:printf("您的银行卡已正常退出"); return 0;
  }
  system("pause");
  system("cls");

 }
}