#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); //第一個參數為加密關鍵字，第二個參數為賬戶序號 int JudgePassword(char *,char *); int decrypt(int *,unsigned char *); void LogIn(unsigned char *,Account *,int); //第二個參數為當前賬戶數目,登陸成功返回1，失敗返回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("銀行數據庫無法打開，按任意鍵結束程序！/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);//將數據存入數組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; } 

#include <stdio.h> #include <stdlib.h> #include <string.h> #include <conio.h> #include <windows.h> #define MaxNum 200 #define N_P 6 //賬戶狀態 0為正常 1為掛失 2為凍結 3為銷戶 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); //第一個參數為加密關鍵字，第二個參數為賬戶序號 int JudgePassword(char *,char *); int decrypt(int *,unsigned char *); void LogIn(unsigned char *,Account *,int); //第二個參數為當前賬戶數目,登陸成功返回1，失敗返回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;  //將文件中的用戶信息存到數組中  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("****中國銀行煙大計163-1分行****/n");  printf("目前共有%d名注冊用戶*****/n",total);  printf("1.登陸*************************/n");  printf("2.開戶*************************/n");  printf("3.進入管理員模式***************/n");  printf("4.退出*************************/n"); } int MakeChoice(int n) {  int judge;  printf("請輸入1~%d/n",n);  scanf("%d",&judge);  while(judge<1||judge>n)//確保輸入的是1~n  {   printf("輸入不合法，請輸入1~%d/n",n);   fflush(stdin);//如果不加這句，輸入一些字母會導致函數無限循環   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')//執行退格刪除操作   {    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("銀行用戶數量已達到上限！/n按任意鍵返回主界面");   getch();   return;  }  int i,flag,num_de[3];  int num_en[3];  char temp_password[N_P],password[N_P];  //將num的個位十位和百位分解，num_de[2]存個位，以此類推  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("請輸入用戶姓名：");   fflush(stdin);   scanf("%19[^/n]",user[num].name);   for(i=0; i<strlen(user[num].name); ++i)   {    if(user[num].name[i]==' ')    {     printf("用戶名中不能包含空格！/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("您的賬號是：");  for(i=0; i<3; ++i)   printf("%03d ",num_en[i]);  while(1)  {   printf("/n請設置密碼：");   EnterPassword(password);   printf("/n請再次確認密碼：");   EnterPassword(temp_password);   if(JudgePassword(temp_password,password))    printf("/n兩次輸入不相等，密碼設置失敗！");   else   {    strcpy(user[num].password,password);    user[num].password[N_P]='/0';    break;   }  }  user[num].amount=0;  user[num].state=0;  printf("/n賬戶創建成功！/n按任意鍵返回主菜單");  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)//輸入賬號  {   printf("請輸入賬號：");   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則賬號輸入錯誤    printf("/n賬號輸入錯誤！/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);  //判斷賬戶狀態  if(user[num].state==3)  {   printf("該賬戶已銷戶，無法使用！/n");   printf("按任意鍵返回操作界面");   getch();   return;  }  else if(user[num].state==2)  {   printf("該賬戶因輸入密碼錯誤次數達三次，已凍結！/n請進入管理員模式解除異常狀態！/n");   printf("按任意鍵返回操作界面");   getch();   return;  }  //判斷結束  i=0;  while(1)//輸入密碼  {   printf("/n請輸入密碼：");   EnterPassword(password);   if(JudgePassword(password,user[num].password)&&(++i<3))    printf("/n密碼輸入錯誤，您還有%d次機會/n",3-i);   else if(i>=3)   {    user[num].state=2;    printf("/n密碼錯誤次數過多，賬戶已凍結!/n");    printf("即將返回主界面 ");    for(i=0; i<3; ++i)    {     printf("%d",i);     Sleep(1000);     printf("/b");    }    return ;   }   else   {    printf("登陸成功！/n");    break;   }  }  Operate(key,user,num,total); } void ShowSubMenu(char *name) {  printf("****歡迎%s登陸本行********/n",name);  printf("1.存款*************************/n");  printf("2.取款*************************/n");  printf("3.查詢*************************/n");  printf("4.轉賬*************************/n");  printf("5.掛失*************************/n");  printf("6.銷戶*************************/n");  printf("7.改密*************************/n");  printf("8.返回主菜單*******************/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) //計算最大存款額max   max*=2;  while(1)  {   system("cls");   ShowSubMenu(user[num].name);   switch(MakeChoice(8))   {   case 1:    system("cls");    while(1)    {     printf("請輸入存款金額：");     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單次存款金額為0~99999元，存款失?。?n");     else if(amount_t>=max-user[num].amount)      printf("總金額超出上限，存款失敗！/n");     else     {      user[num].amount+=amount_t;      printf("/n存款成功！按任意鍵返回操作界面");      getch();      system("cls");      break;     }    }    break;   case 2:    system("cls");    if(user[num].state==1)    {     printf("該賬戶已掛失，無法執行取款操作！/n");     printf("按任意鍵返回操作界面");     getch();     break;    }    while(1)    {     printf("請輸入取款金額：");     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單次存款金額為0~99999元，存款失敗！/n");     else if(amount_t>user[num].amount)      printf("/n賬戶余額不足，取款失敗!/n");     else     {      user[num].amount-=amount_t;      printf("/n取款成功！按任意鍵返回操作界面");      getch();      system("cls");      break;     }    }    break;   case 3:    system("cls");    printf("用戶姓名：%s",user[num].name);    printf("賬戶余額：%lu/n",user[num].amount);    printf("賬戶狀態：");    if(user[num].state==1)     printf("已掛失/n");    else     printf("正常/n");    printf("按任意鍵返回操作界面");    getch();    system("cls");    break;   case 4:    system("cls");    if(user[num].state==1)    {     printf("該賬戶已掛失，無法執行轉賬操作！/n");     printf("按任意鍵返回操作界面");     getch();     break;    }    num_t=EnterAccountNumber(key,total);    while(1)    {     printf("請輸入轉賬金額：");     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單次存款金額為0~99999元，存款失?。?n");     else if(amount_t>user[num].amount)      printf("賬戶金額不足，轉賬失敗!/n");     else if(amount_t>=max-user[num_t].amount)      printf("/n對方總金額超出上限，轉賬失?。?n");     else     {      user[num].amount-=amount_t;      user[num_t].amount+=amount_t;      printf("/n轉賬成功！按任意鍵返回操作界面");      getch();      system("cls");      break;     }    }    break;   case 5:    system("cls");    printf("您確定要掛失嗎？/n");    printf("1.確定 2.取消/n");    if(MakeChoice(2)==1)    {     user[num].state=1;     printf("掛失成功！/n按任意鍵返回主界面");     getch();    }    system("cls");    break;   case 6:    system("cls");    printf("您確定要銷戶嗎？銷戶后所有功能都將無法實現，賬戶內的存款將凍結！/n");    printf("1.確定 2.取消/n");    if(MakeChoice(2)==1)    {     user[num].state=3;     printf("銷戶成功！/n按任意鍵返回主界面");     getch();     system("cls");     return;    }    else     break;   case 7:    system("cls");    while(1)    {     printf("/n請輸入原密碼：");     EnterPassword(password);     if(JudgePassword(password,user[num].password))      printf("/n原密碼輸入錯誤！/n");     else      break;    }    while(1)    {     printf("/n請輸入新密碼：");     EnterPassword(password);     printf("/n請再次確認密碼：");     EnterPassword(temp_password);     if(JudgePassword(temp_password,password))      printf("/n兩次輸入不相等，密碼設置失敗！");     else     {      strcpy(user[num].password,password);      break;     }    }    printf("/n密碼修改成功！/n按任意鍵返回操作界面");    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)//輸入密碼  {   printf("請輸入管理員密碼密碼：");   EnterPassword(password);   if(JudgePassword(password,administrator_password))    printf("密碼輸入錯誤！/n");   else    break;  }  printf("/n登陸成功！按任意鍵繼續");  getch();  while(1)  {   system("cls");   ShowAdministratorMenu();   switch(MakeChoice(6))   {   case 1:    system("cls");    num=EnterAccountNumber(key,total);    printf("請設置密碼：");    EnterPassword(password);    printf("您設置的密碼是：");    puts(user[num].password);    printf("/n按任意鍵返回操作界面");    getch();    break;   case 2:    system("cls");    num=EnterAccountNumber(key,total);    printf("您確定要解除此用戶的掛失狀態嗎？/n");    printf("1.確定 2.取消/n");    if(MakeChoice(2)==1)    {     user[num].state=0;     printf("解除掛失成功！/n按任意鍵返回主界面");     getch();    }    break;   case 3:    system("cls");    num=EnterAccountNumber(key,total);    printf("/n您確定要解除此用戶的凍結狀態嗎？/n");    printf("1.確定 2.取消/n");    if(MakeChoice(2)==1)    {     user[num].state=0;     printf("解除凍結成功！/n按任意鍵返回主界面");     getch();    }    break;   case 4:    system("cls");    while(1)    {     printf("請輸入新密碼：");     EnterPassword(password);     printf("/n請再次確認密碼：");     EnterPassword(temp_password);     if(JudgePassword(temp_password,password))      printf("/n兩次輸入不相等，密碼設置失敗！/n");     else     {      strcpy(administrator_password,password);      break;     }    }    printf("/n管理員密碼修改成功！/n按任意鍵返回操作界面");    getch();    break;   case 5:    system("cls");    printf("當前的賬號生成關鍵字為“%s”，更改之后所有之前創建的賬戶將無法打開！/n",key_orig);    printf("您確定要更改賬號生成關鍵字嗎？/n");    printf("1.確定 2.取消/n");    if(MakeChoice(2)==1)    {     printf("請輸入新的關鍵字：");     scanf("%3s",key_orig);     printf("當前的關鍵字已更改為“%s”/n按任意鍵返回操作界面",key_orig);     getch();    }    break;   default:    return;   }  } } void ShowAdministratorMenu() {  printf("****中國銀行煙大計163-1分行****/n");  printf("**********管理員模式***********/n");  printf("1.修改用戶密碼*****************/n");  printf("2.解除掛失*********************/n");  printf("3.解除凍結*********************/n");  printf("4.修改管理員密碼***************/n");  printf("5.修改賬號生成關鍵字***********/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); }