C语言银行系统课程设计

本文为大家分享了C语言银行系统课程设计，供大家参考，具体内容如下

main.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <conio.h>
#include <windows.h>
#define MaxNum 200
#define N_P 6
typedef struct
{
 int AccountNumber[3];
 char name[20];
 char password[N_P+1];
 unsigned long amount;
 int state;
} Account;
void Load(FILE *,Account *);
void ShowMenu(int );
int MakeChoice(int );
void EnterPassword(char *);
void CreatAccount(unsigned char *,Account *,int); //第一个参数为加密关键字，第二个参数为账户序号
int JudgePassword(char *,char *);
int decrypt(int *,unsigned char *);
void LogIn(unsigned char *,Account *,int); //第二个参数为当前账户数目,登陆成功返回1，失败返回0
int EnterAccountNumber(unsigned char *,int );
void EnterNum(char *,int );
void Operate(unsigned char *,Account *,int ,int );
void ShowSubMenu(char *);
void AdministratorMode(unsigned char *,unsigned char *,Account *,char *,int);
void ShowAdministratorMenu();
void WriteToFile(FILE *,unsigned char *,Account*,char *,int);
int main()
{
 FILE *fp;
 int i,total;
 unsigned char key[4],key_en[4];
 char administrator_password[10];
 Account *user;
 user=(Account *)malloc(sizeof(Account)*MaxNum);
 fp=fopen("bank.txt","r+");
 if(fp==NULL)
 {
  printf("银行数据库无法打开，按任意键结束程序！\n");
  getch();
  exit(1);
 }
 fscanf(fp,"%d\n%s\n%s",&total,administrator_password,key);
 for(i=0;i<3;++i)//用key_en保存key的值
  key_en[i]=key[i];
 key_en[0]=(key_en[0]<<3)|(key_en[0]>>(sizeof(key_en[0])*8-3));
 key_en[2]=(key_en[2]>>3)|(key_en[2]<<(sizeof(key_en[2])*8-3));
 Load(fp,user);//将数据存入数组user中
 while(1)
 {
  system("cls");
  ShowMenu(total);
  switch(MakeChoice(4))
  {
  case 1:
   system("cls");
   LogIn(key_en,user,total);
   break;
  case 2:
   system("cls");
   CreatAccount(key_en,user,total++);
   break;
  case 3:
   system("cls");
   AdministratorMode(key,key_en,user,administrator_password,total);
   break;
  default:
   system("cls");
   WriteToFile(fp,key,user,administrator_password,total);
   return 0;
  }
 }
 return 0;
}

function.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <conio.h>
#include <windows.h>
#define MaxNum 200
#define N_P 6
//账户状态 0为正常 1为挂失 2为冻结 3为销户
typedef struct
{
 int AccountNumber[3];
 char name[20];
 char password[N_P];
 unsigned long amount;
 int state;
} Account;
void Load(FILE *,Account *);
void ShowMenu(int );
int MakeChoice(int );
void EnterPassword(char *);
void CreatAccount(unsigned char *,Account *,int); //第一个参数为加密关键字，第二个参数为账户序号
int JudgePassword(char *,char *);
int decrypt(int *,unsigned char *);
void LogIn(unsigned char *,Account *,int); //第二个参数为当前账户数目,登陆成功返回1，失败返回0
int EnterAccountNumber(unsigned char *,int );
void EnterNum(char *,int );
void Operate(unsigned char *,Account *,int,int );
void ShowSubMenu(char *);
void AdministratorMode(unsigned char *,unsigned char *,Account *,char *,int);
void ShowAdministratorMenu();
void WriteToFile(FILE *,unsigned char *,Account*,char *,int);
void Load(FILE *fp,Account *user)
{
 int count=0;
 //将文件中的用户信息存到数组中
 while(fscanf(fp,"\n%d%d%d %s %s %lu %d\n",&user[count].AccountNumber[0],&user[count].AccountNumber[1],\
     &user[count].AccountNumber[2],user[count].name,\
     user[count].password,&user[count].amount,&user[count].state)!=EOF)
  ++count;
}
void ShowMenu(int total)
{
 printf("****中国银行烟大计163-1分行****\n");
 printf("目前共有%d名注册用户*****\n",total);
 printf("1.登陆*************************\n");
 printf("2.开户*************************\n");
 printf("3.进入管理员模式***************\n");
 printf("4.退出*************************\n");
}
int MakeChoice(int n)
{
 int judge;
 printf("请输入1~%d\n",n);
 scanf("%d",&judge);
 while(judge<1||judge>n)//确保输入的是1~n
 {
  printf("输入不合法，请输入1~%d\n",n);
  fflush(stdin);//如果不加这句，输入一些字母会导致函数无限循环
  scanf("%d",&judge);
 }
 return judge;
}
void EnterPassword(char *password)
{
 int i;
 char t;
 for(i=0; i<N_P; ++i)
 {
  t=getch();
  if(t=='\b')//执行退格删除操作
  {
   printf("\b \b");
   i-=2;
   continue;
  }
  while(t<'0'||t>'9')
   t=getch();
  password[i]=t;
  putchar('*');
 }
}
void EnterNum(char *s,int n)
{
 int i=0;
 char t;
 while(i<n)
 {
  t=getch();
  if(t=='\b')
  {
   printf("\b \b");
   --i;
   continue;
  }
  else if(t=='\r'||t=='\n')
   break;
  while(t<'0'||t>'9')
   t=getch();
  s[i]=t;
  putchar(t);
  ++i;
 }
}
int JudgePassword(char *temp_password,char *password)
{
 int i;
 for(i=0; i<N_P; ++i)
 {
  if(temp_password[i]!=password[i])
   break;
 }
 if(i==N_P)
  return 0;
 else
  return 1;
}
void CreatAccount(unsigned char *key,Account *user,int num)
{
 if(num>=MaxNum)
 {
  printf("银行用户数量已达到上限！\n按任意键返回主界面");
  getch();
  return;
 }
 int i,flag,num_de[3];
 int num_en[3];
 char temp_password[N_P],password[N_P];
 //将num的个位十位和百位分解，num_de[2]存个位，以此类推
 for(i=0; i<3; ++i)
  num_de[i]=0;
 for(i=0; i<3; ++i)
  num_en[i]=0;
 if(num<10)
  num_de[2]=num;
 else if(num<100)
 {
  num_de[2]=num%10;
  num_de[1]=num/10;
 }
 else
 {
  for(i=0; i<3; ++i)
  {
   num_de[i]=num%10;
   num/=10;
  }
 }
 //分解完成
 while(1)
 {
  flag=0;
  printf("请输入用户姓名：");
  fflush(stdin);
  scanf("%19[^\n]",user[num].name);
  for(i=0; i<strlen(user[num].name); ++i)
  {
   if(user[num].name[i]==' ')
   {
    printf("用户名中不能包含空格！\n");
    flag=1;
    break;
   }
  }
  if(flag==0)
   break;
 }
 for(i=0; i<3; ++i)
  num_en[i]=num_de[i]^key[i];
 for(i=0; i<3; ++i)
  user[num].AccountNumber[i]=num_en[i];
 printf("您的账号是：");
 for(i=0; i<3; ++i)
  printf("%03d ",num_en[i]);
 while(1)
 {
  printf("\n请设置密码：");
  EnterPassword(password);
  printf("\n请再次确认密码：");
  EnterPassword(temp_password);
  if(JudgePassword(temp_password,password))
   printf("\n两次输入不相等，密码设置失败！");
  else
  {
   strcpy(user[num].password,password);
   user[num].password[N_P]='\0';
   break;
  }
 }
 user[num].amount=0;
 user[num].state=0;
 printf("\n账户创建成功！\n按任意键返回主菜单");
 getch();
}
int decrypt(int *num_en,unsigned char *key)
{
 int i,num,num_de[3];
 for(i=0; i<3; ++i)
  num_de[i]=num_en[i]^key[i];
 num=num_de[0]*100+num_de[1]*10+num_de[2];
 return num;
}
int EnterAccountNumber(unsigned char *key,int total)
{
 int i,num;
 int num_en[3];
 char num_en_char[3];
 while(1)//输入账号
 {
  printf("请输入账号：");
  for(i=0;i<3;++i)
  {
   EnterNum(num_en_char,3);
   num_en[i]=atoi(num_en_char);
  }
  num=decrypt(num_en,key);
  if(num>total)//若num大于total则账号输入错误
   printf("\n账号输入错误！\n");
  else
   break;
 }
 return num;
}
void LogIn(unsigned char *key,Account *user,int total)
{
 int num,i;
 char password[N_P];
 num=EnterAccountNumber(key,total);
 //判断账户状态
 if(user[num].state==3)
 {
  printf("该账户已销户，无法使用！\n");
  printf("按任意键返回操作界面");
  getch();
  return;
 }
 else if(user[num].state==2)
 {
  printf("该账户因输入密码错误次数达三次，已冻结！\n请进入管理员模式解除异常状态！\n");
  printf("按任意键返回操作界面");
  getch();
  return;
 }
 //判断结束
 i=0;
 while(1)//输入密码
 {
  printf("\n请输入密码：");
  EnterPassword(password);
  if(JudgePassword(password,user[num].password)&&(++i<3))
   printf("\n密码输入错误，您还有%d次机会\n",3-i);
  else if(i>=3)
  {
   user[num].state=2;
   printf("\n密码错误次数过多，账户已冻结!\n");
   printf("即将返回主界面 ");
   for(i=0; i<3; ++i)
   {
    printf("%d",i);
    Sleep(1000);
    printf("\b");
   }
   return ;
  }
  else
  {
   printf("登陆成功！\n");
   break;
  }
 }
 Operate(key,user,num,total);
}
void ShowSubMenu(char *name)
{
 printf("****欢迎%s登陆本行********\n",name);
 printf("1.存款*************************\n");
 printf("2.取款*************************\n");
 printf("3.查询*************************\n");
 printf("4.转账*************************\n");
 printf("5.挂失*************************\n");
 printf("6.销户*************************\n");
 printf("7.改密*************************\n");
 printf("8.返回主菜单*******************\n");
}
void Operate(unsigned char *key,Account *user,int num,int total)
{
 int i,num_t;
 unsigned long amount_t,max=1;
 char password[N_P],temp_password[N_P],amount_judge[6];
 for(i=0; i<(sizeof(unsigned long)*8-1); ++i) //计算最大存款额max
  max*=2;
 while(1)
 {
  system("cls");
  ShowSubMenu(user[num].name);
  switch(MakeChoice(8))
  {
  case 1:
   system("cls");
   while(1)
   {
    printf("请输入存款金额：");
    for(i=0;i<6;++i)
     amount_judge[i]='\0';
    EnterNum(amount_judge,5);
    amount_t=atol(amount_judge);
    if(amount_t>99999)
     printf("\n单次存款金额为0~99999元，存款失败！\n");
    else if(amount_t>=max-user[num].amount)
     printf("总金额超出上限，存款失败！\n");
    else
    {
     user[num].amount+=amount_t;
     printf("\n存款成功！按任意键返回操作界面");
     getch();
     system("cls");
     break;
    }
   }
   break;
  case 2:
   system("cls");
   if(user[num].state==1)
   {
    printf("该账户已挂失，无法执行取款操作！\n");
    printf("按任意键返回操作界面");
    getch();
    break;
   }
   while(1)
   {
    printf("请输入取款金额：");
    for(i=0;i<6;++i)
     amount_judge[i]='\0';
    EnterNum(amount_judge,5);
    amount_t=atol(amount_judge);
    if(amount_t>99999)
     printf("\n单次存款金额为0~99999元，存款失败！\n");
    else if(amount_t>user[num].amount)
     printf("\n账户余额不足，取款失败!\n");
    else
    {
     user[num].amount-=amount_t;
     printf("\n取款成功！按任意键返回操作界面");
     getch();
     system("cls");
     break;
    }
   }
   break;
  case 3:
   system("cls");
   printf("用户姓名：%s",user[num].name);
   printf("账户余额：%lu\n",user[num].amount);
   printf("账户状态：");
   if(user[num].state==1)
    printf("已挂失\n");
   else
    printf("正常\n");
   printf("按任意键返回操作界面");
   getch();
   system("cls");
   break;
  case 4:
   system("cls");
   if(user[num].state==1)
   {
    printf("该账户已挂失，无法执行转账操作！\n");
    printf("按任意键返回操作界面");
    getch();
    break;
   }
   num_t=EnterAccountNumber(key,total);
   while(1)
   {
    printf("请输入转账金额：");
    for(i=0;i<6;++i)
     amount_judge[i]='\0';
    EnterNum(amount_judge,5);
    amount_t=atol(amount_judge);
    if(amount_t>99999)
     printf("\n单次存款金额为0~99999元，存款失败！\n");
    else if(amount_t>user[num].amount)
     printf("账户金额不足，转账失败!\n");
    else if(amount_t>=max-user[num_t].amount)
     printf("\n对方总金额超出上限，转账失败！\n");
    else
    {
     user[num].amount-=amount_t;
     user[num_t].amount+=amount_t;
     printf("\n转账成功！按任意键返回操作界面");
     getch();
     system("cls");
     break;
    }
   }
   break;
  case 5:
   system("cls");
   printf("您确定要挂失吗？\n");
   printf("1.确定 2.取消\n");
   if(MakeChoice(2)==1)
   {
    user[num].state=1;
    printf("挂失成功！\n按任意键返回主界面");
    getch();
   }
   system("cls");
   break;
  case 6:
   system("cls");
   printf("您确定要销户吗？销户后所有功能都将无法实现，账户内的存款将冻结！\n");
   printf("1.确定 2.取消\n");
   if(MakeChoice(2)==1)
   {
    user[num].state=3;
    printf("销户成功！\n按任意键返回主界面");
    getch();
    system("cls");
    return;
   }
   else
    break;
  case 7:
   system("cls");
   while(1)
   {
    printf("\n请输入原密码：");
    EnterPassword(password);
    if(JudgePassword(password,user[num].password))
     printf("\n原密码输入错误！\n");
    else
     break;
   }
   while(1)
   {
    printf("\n请输入新密码：");
    EnterPassword(password);
    printf("\n请再次确认密码：");
    EnterPassword(temp_password);
    if(JudgePassword(temp_password,password))
     printf("\n两次输入不相等，密码设置失败！");
    else
    {
     strcpy(user[num].password,password);
     break;
    }
   }
   printf("\n密码修改成功！\n按任意键返回操作界面");
   getch();
   system("cls");
   break;
  default:
   return;
  }
 }
}
void AdministratorMode(unsigned char *key_orig,unsigned char *key,Account *user,char *administrator_password,int total)
{
 int num;
 char password[N_P],temp_password[N_P];
 while(1)//输入密码
 {
  printf("请输入管理员密码密码：");
  EnterPassword(password);
  if(JudgePassword(password,administrator_password))
   printf("密码输入错误！\n");
  else
   break;
 }
 printf("\n登陆成功！按任意键继续");
 getch();
 while(1)
 {
  system("cls");
  ShowAdministratorMenu();
  switch(MakeChoice(6))
  {
  case 1:
   system("cls");
   num=EnterAccountNumber(key,total);
   printf("请设置密码：");
   EnterPassword(password);
   printf("您设置的密码是：");
   puts(user[num].password);
   printf("\n按任意键返回操作界面");
   getch();
   break;
  case 2:
   system("cls");
   num=EnterAccountNumber(key,total);
   printf("您确定要解除此用户的挂失状态吗？\n");
   printf("1.确定 2.取消\n");
   if(MakeChoice(2)==1)
   {
    user[num].state=0;
    printf("解除挂失成功！\n按任意键返回主界面");
    getch();
   }
   break;
  case 3:
   system("cls");
   num=EnterAccountNumber(key,total);
   printf("\n您确定要解除此用户的冻结状态吗？\n");
   printf("1.确定 2.取消\n");
   if(MakeChoice(2)==1)
   {
    user[num].state=0;
    printf("解除冻结成功！\n按任意键返回主界面");
    getch();
   }
   break;
  case 4:
   system("cls");
   while(1)
   {
    printf("请输入新密码：");
    EnterPassword(password);
    printf("\n请再次确认密码：");
    EnterPassword(temp_password);
    if(JudgePassword(temp_password,password))
     printf("\n两次输入不相等，密码设置失败！\n");
    else
    {
     strcpy(administrator_password,password);
     break;
    }
   }
   printf("\n管理员密码修改成功！\n按任意键返回操作界面");
   getch();
   break;
  case 5:
   system("cls");
   printf("当前的账号生成关键字为“%s”，更改之后所有之前创建的账户将无法打开！\n",key_orig);
   printf("您确定要更改账号生成关键字吗？\n");
   printf("1.确定 2.取消\n");
   if(MakeChoice(2)==1)
   {
    printf("请输入新的关键字：");
    scanf("%3s",key_orig);
    printf("当前的关键字已更改为“%s”\n按任意键返回操作界面",key_orig);
    getch();
   }
   break;
  default:
   return;
  }
 }
}
void ShowAdministratorMenu()
{
 printf("****中国银行烟大计163-1分行****\n");
 printf("**********管理员模式***********\n");
 printf("1.修改用户密码*****************\n");
 printf("2.解除挂失*********************\n");
 printf("3.解除冻结*********************\n");
 printf("4.修改管理员密码***************\n");
 printf("5.修改账号生成关键字***********\n");
 printf("6.返回主界面*******************\n");
}
void WriteToFile(FILE *fp,unsigned char *key,Account *user,char *administrator_password,int total)
{
 int i,j;
 rewind(fp);
 fprintf(fp,"%d\n%6s\n%3s\n",total,administrator_password,key);
 for(i=0; i<total; ++i)
 {
  for(j=0; j<3; ++j)
   fprintf(fp,"%03d ",user[i].AccountNumber[j]);
  fprintf(fp,"%s %6s %lu %d\n",user[i].name,user[i].password,\
    user[i].amount,user[i].state);
 }
 fclose(fp);
} 

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