真正的ATM系统不可能只是用C语言编写的，它应该是一套完整独立的系统，核心代码更机密，不会轻易的泄露。
C语言可以写一个类似于ATM系统的框架，用以模拟ATM机上的各种操作。
框架代码如下：
#include<iostream.h>#include<stdio.h>
int main()
{
int choice =- 1
while(1) {
printf("请选择\n1.login\t2.regist\n")
scanf("%d", &choice)
switch(choice) {
case 1:
login()
break
case 2:
regist()
break
default:
printf("输入有误，重新输入\n")
break
}
}
return 0
}
void login() {
printf("IN LOGIN\n")
int flag = -1
int X = -1
printf("输入账户和密码\n")
flag = search()
if(falg == 1) {
printf("存在，进入主页面\n")
X = menu()
if(X == 1)
return
}
else if(flag == 0) {
printf("账户或密码错误\n")
return
}
}
int regist() {
printf("IN REGIST\n")
return 1
}
int menu() {
printf("IN MENU\n")
int key = -1
int N = -1
while(1) {
printf("请选择业务：1.refer\t2.deposit\t3.withdraw\t4.transfer\t5.resetPW\t6.退出\n")
scanf("%d", &key)
switch(key) {
case 1:
N = refer()
break
case 2:
N = deposit()
break
case 3:
N = withdraw()
break
case 4:
N = transfer()
break
case 5:
N = resetPW()
break
case 6:
N = 6
return 1
break
default:
printf("输入有误，重新选择：\n")
break
}
if(N%2 == 0) {
printf("Error!\n")
}
}
}
int refer() {
printf("IN REFER\n")
//输出余额
return 1
}
int deposit() {
printf("IN DEPOSIT\n")
//存钱
return 3
}
int withdraw() {
printf("IN WITHDRAW\n")
//取钱
return 5
}
int transfer() {
ptintf("IN TRANSFER\n")
//转账
return 7
}
int resetPW() {
prtintf("IN RESETPW\n")
//重设密码
return 9
}
#include<stdio.h>void main()
{
char SelectKey,CreditMoney,DebitMoney
while(1)
{
do{
clrscr()
puts("Please select key:")
puts("1.Quary")
puts("2.Credit")
puts("3.Debit")
puts("4.Return")
SelectKey=getch()
}while(SelectKey!='1'&&SelectKey!='2'&&SelectKey!='3'&&SelectKey!='4')
switch(SelectKey)
{
case'1':
clrscr()
puts("Your balance is $1000")
getch()
break
case'2':
do{
clrscr()
puts("Please select Credit money:")
puts("1.$50")
puts("2.$100")
puts("3.Return")
CreditMoney=getch()
}while(CreditMoney!='1'&&CreditMoney!='2'&&CreditMoney!='3')
switch(CreditMoney)
{
case'1':
clrscr()
puts("Your Credit money is $50,Thank you!")
getch()
break
case'2':
clrscr()
puts("Your Credit money is $100,Thank you!")
getch()
break
case'3':
break
}
break
case'3':
do{
clrscr()
puts("Please select Debit money:")
puts("1.$50")
puts("2.$100")
puts("3.$500")
puts("4.$1000")
puts("5.Return")
DebitMoney=getch()
}while(DebitMoney!='1'&&DebitMoney!='2'&&DebitMoney!='3'&&DebitMoney!='4'&&DebitMoney!='5')
switch(DebitMoney)
{
case'1':
clrscr()
puts("Your Debit money is $50,Thank you!")
getch()
break
case'2':
clrscr()
puts("Your Debit money is $100,Thank you!")
getch()
break
case'3':
clrscr()
puts("Your Debit money is $500,Thank you!")
getch()
break
case'4':
clrscr()
puts("Your Debit money is $1000,Thank you!")
getch()
break
case'5':
break
}
break
case'4':
return
}
}
}
几个小错误而已...比如忘了写双撇号,switch写错了...还有!= 忘了写! 等等.. 以上程序可以运行了
#include<stdio.h>#include<stdlib.h>
#include<string.h>
#include<math.h>
#include<conio.h>
void
sys(const
char
*ex)
{
printf(ex)
fflush(stdin)
getch()
}
struct
atm
{
float
money
char
card[20]
char
pass[20]
}
struct
atm
*creat()
{
struct
atm
*p
p=(struct
atm
*)malloc(sizeof(struct
atm))
printf("请输入密码:")
gets(p->pass)getchar()
printf("请输入卡号:")
gets(p->card)getchar()
printf("卡号为=%s,密码为=%s\n",p->card,p->pass)
printf("请输入预存款金额:")
scanf("%f",&p->money)
return
p
}
struct
atm
*qukuan(struct
atm
*p)
{
float
money
printf("请输入取款金额:")
scanf("%f",&money)
if(money>p->money){printf("余额不足!\n")return
p}
p->money-=money
return
p
}
void
print(struct
atm
*p)
{
printf("当前余额为%.2f,可取款金额为%d\n",p->money,floor(p->money)/100)
}
int
yanzheng(struct
atm
*p)
{
char
pass[20]
printf("你好，请输入密码：")
gets(pass)
if(strcmp(pass,p->pass)==0)
return
1
return
0
}
void
main()
{
struct
atm
*p
int
t=0
p=creat()
do
t++
while(!yanzheng(p)&&t<3)
if(t==3){printf("密码连续三次输入错误，退出程序!\n")return
1}
while(1)
{
system("cls")
printf("****欢迎您使用ATM取款机!****\n")
printf("1:\t取款\n")
printf("2:\t查看余额\n")
printf("0:\t退出\n")
printf("请选择:")
scanf("%d",&t)
fflush(stdin)
switch(t)
{
case
1:qukuan(p)break
case
2:print(p)break
}
if(!t)
{
sys("请按任意键退出...")
break
}
sys("请按任意键返回...")
}
}
