Advanced 21st class, practice, simplified Banking system Development Fourth edition

/**copyright (c) 2015/6/3 csdn blog *all rights reserved.* file name: main.c*    Creator: Golden Leaf * finish Date: 2015/6/3* version number: v1.0* problem Description: Small Banking application * Program output: */#include <stdio.h> #include "bank.h" int main () {    if (ipass () ==1)    {        downdate ();        Work ();        Update ();    }    return 0;}

#ifndef bank_h_included#define bank_h_included#define upnum 2000int ipass (); Bank Employee Password confirmation void downdate (); Load data int ichoose (); The bank employee selects the function int search (int id); Used to find the account corresponding subscript int inputpass (); Used to enter the password void work (); Main Menu void Open_account (); 1 Open account void cancellation (); 2 write-off void deposit (); 3 deposit void Withdraw_money (); 4 withdrawal void query (); 5 query void Transfer_accounts (); 6 transfer void loss (); 7 reporting void Unloss (); 8 unpacking void change (); 9 The Secret Void Update (); Save data, exit struct bank{    int num;    Char name[20];    int password;    Double balance;    int state;}; struct bank user[upnum];int N; Actual number of bank users #endif//bank_h_included

#include <stdio.h> #include <string.h> #include <stdlib.h> #include <ctype.h> #include <    conio.h> #include "bank.h" int ipass () {int i,j=3,k;    int right=0;    Char ch;    Char worker[20][20];    Char ipass[20][20];    Char worker1[20];    Char ipass1[20];    FILE *FP;    printf ("+-------------------+\n");    printf ("+ Welcome to CSDN Bank +\n");    printf ("+-------------------+\n");        if ((Fp=fopen ("Worker.txt", "R")) ==null) {printf ("Worker file cannot open!");    Exit (0);    } for (i=0; i<20; i++) {fscanf (FP, "%s%s", worker[i],ipass[i]);//read into the worker user name} fclose (FP);        Do {printf ("Please enter the clerk's user name:");        scanf ("%s", worker1);        printf ("Please enter password:");        i=0;   while ((Ch=getch ()) = ' \ r ') {ipass1[i++]=ch-1;        File save password using encrypted Putchar (' * ');        } ipass1[i]= ' + ';        Fflush (stdin);        printf ("\ n"); for (k=0; k<20; k++) {if (strcmp (worker1,worker[k]) ==0&AMP;&AMP;STRCMP (Ipass1,ipass[k]) ==0) right=1;        } if (right==1) {break;            } else {j--; if (j>0) {printf ("more than 3 times will exit, you can also try%d times!")            \ n ", j);                } else {printf ("Sorry, you cannot enter the system \ n");            Exit (0);    }}} while (j); return right;}

#include <stdio.h> #include <string.h> #include <stdlib.h> #include <ctype.h> #include <    conio.h> #include "bank.h" void Downdate () {int i=0;    FILE *FP;        if ((Fp=fopen ("Bank.txt", "R")) ==null) {printf ("Bank file cannot open!");    Exit (0); } while (FSCANF (FP, "%d%s%d%lf%d", &user[i].num,user[i].name, &user[i].password, &user[i].balance,&    user[i].state)! = EOF) {i++;    } n=i;    Fclose (FP); return;}    void work () {int ichose;        do {ichose=ichoose ();        Switch (ichose) {case 1:open_account ();//opening a break; Case 2:cancellation ();        2 write-off break; Case 3:deposit ();        3 Deposit break; Case 4:withdraw_money ();        4 withdrawal break; Case 5:query ();        5 query break; Case 6:transfer_accounts ();        6 transfer break; Case 7:loSS ();        7 Report loss break; Case 8:unloss ();        8 Unpacking break; Case 9:change ();        9 The secret break;            Case 0:printf ("Welcome again \"); Update (); Save Exit}} while (Ichose);}    int Ichoose () {int ichose;        while (1) {printf ("\ n");        printf ("+----------------------------+\n");        printf ("+ 1 account opening 2 pin households 3 deposit +\n");        printf ("+ 4 withdrawals 5 enquiries 6 transfer +\n");        printf ("+ 7 lost 8 9 +\n");        printf ("+ 0 exit +\n");        printf ("+----------------------------+\n");        printf ("Please enter operation instructions:");        scanf ("%d", &ichose);        if (ichose>=0 && ichose<=9) {break;    } else printf ("Input error, please re-select \ n \ nthe"); } return ichose;}    void Open_account () {int ipass1,ipass2;    if (n==upnum) {printf ("The bank user reaches the upper limit and cannot open an account \ \");    } printf ("Opening an account \ n");    printf ("Please enter user account:"); scanf ("%d", &user[N].num);    printf ("Please enter user name:");    scanf ("%s", user[n].name);    printf ("Please enter password:");    Ipass1=inputpass ();    printf ("Please Confirm password again:");    Ipass2=inputpass ();        if (ipass1==ipass2) {user[n].password=ipass1;        user[n].state=0;        printf ("Deposit Amount:");        scanf ("%lf", &user[n].balance); printf ("Successful account opening!")        \ n ");    n++; } else {printf ("Bad password, failed to open account!")    \ n ");    }}void cancellation () {int i;    int cancel;    int pass;    printf ("Enter the user account to be sold:");    scanf ("%d", &cancel);    I=search (cancel);    printf ("Name:%s\n", user[i].name);    printf ("Password:");    Pass=inputpass ();        if (Pass==user[i].password) {printf ("Balance:%.2lf", user[i].balance);        printf ("Confirm pin y/n:");  if (ToLower (GetChar ()) = = ' Y ') {user[i].balance=0;  After withdrawal, the balance becomes 0 user[i].state=2; Status changed to logout printf ("Withdrawal%.2f yuan, pin the success of the household!")        \ n ", user[i].balance); } else {printf ("You canceled the operation, the PIN user failed!")        \ n "); }} else {printf ("Password error, pinFailed!    \ n ");    }}void deposit () {int i;    int id;    int pass;    Double money;    printf ("Please enter your account:");    scanf ("%d", &id);    I=search (ID); if (i<0) {printf ("username does not exist!")    \ n ");        } else {printf ("Name:%s", user[i].name);        printf ("Password:");        Pass=inputpass ();            if (pass==user[i].password&&user[i].state==0) {printf ("Enter Deposit Amount:");            scanf ("%lf", &money);        printf ("Total balance%.2lf, deposit success", money+user[i].balance); } else if (pass==user[i].password&&user[i].state==1) {printf ("card has been lost, deposit failed!")        \ n "); } else if (pass==user[i].password&&user[i].state==2) {printf ("card is unregistered, deposit failed!")        \ n "); } else {printf ("Bad password, deposit failed!        \ n ");    }}}void Withdraw_money () {int i;    int id;    int pass;    Double money;    printf ("Please enter your account:");    scanf ("%d", &id);    I=search (ID); if (i<0) {printf ("username does not exist!")    \ n "); } else    {printf ("Name:%s", user[i].name);        printf ("Password:");        Pass=inputpass ();            if (pass==user[i].password&&user[i].state==0) {printf ("Balance:%.2lf\n", user[i].balance);            printf ("Withdrawal amount:");            scanf ("%lf", &money);            if (money>user[i].balance) {printf ("Insufficient balance, withdrawal failed");                } else {User[i].balance-=money;            printf ("Balance:%.2lf", user[i].balance); }} else if (pass==user[i].password&&user[i].state==1) {printf ("card has been lost, withdrawal failed!")        \ n "); } else if (pass==user[i].password&&user[i].state==2) {printf ("card is unregistered, withdrawal failed!")        \ n "); } else {printf ("Bad password, withdrawal failed!        \ n ");    }}}void query () {int i;    int id;    int pass;    printf ("Please enter your account:");    scanf ("%d", &id);    I=search (ID);    printf ("Name:%s", user[i].name);    printf ("Password:"); Pass=inputPass ();        if (Pass==user[i].password) {printf ("Balance:%.2lf\n", user[i].balance);        if (user[i].state==0) {printf ("Current state: normal \ n");        } else if (user[i].state==1) {printf ("Current status: report loss \ n");        } else printf ("Current status: Logoff \ n"); printf ("Query finished!    \ n ");    } else {printf ("Bad password, query failed \ n");    }}void transfer_accounts () {int id,id2;    int i,i2;    Double money;    int pass;    printf ("Please enter the transfer account:");    scanf ("%d", &id);    I=search (ID);    printf ("Name:%s", user[i].name);    printf ("Password:");    Pass=inputpass ();        if (pass==user[i].password&&user[i].state==0) {printf ("Please enter the transfer account:");        scanf ("%d", &AMP;ID2);        I2=search (ID2);        printf ("Transfer amount:");        scanf ("%lf", &money); if (money>user[i].balance) {printf ("Insufficient amount, transfer failed!")        \ n ");            } else {printf ("Transfer succeeded, balance%.2lf\n", User[i].balance-money);  User[i2].balance+=money;      }}}void loss () {int id;    int i;    int pass;    printf ("Please enter your account:");    scanf ("%d", &id);    I=search (ID);    printf ("Name:%s", user[i].name);    printf ("Password:");    Pass=inputpass ();        if (Pass==user[i].password) {printf ("Balance:%.2lf\n", user[i].balance);            if (user[i].state==0) {printf ("Current state: normal \ n");            user[i].state=1; printf ("Success in reporting!"        \ n ");        } else if (user[i].state==1) {printf ("Current status: report loss \ n");    } else printf ("Current status: Logoff \ n");    } else {printf ("Bad password, lost report \ n");    }}void Unloss () {int id;    int i;    int pass;    printf ("Please enter your account:");    scanf ("%d", &id);    I=search (ID);    printf ("Name:%s", user[i].name);    printf ("Password:");    Pass=inputpass ();        if (Pass==user[i].password) {printf ("Balance:%.2lf\n", user[i].balance);        if (user[i].state==0) {printf ("Current state: normal \ n"); } else if (user[i].state==1) {printf ("currentStatus: Loss of the report \ n ");            user[i].state=0; printf ("The solution hangs successfully!")        \ n ");    } else printf ("Current status: Logoff \ n");    } else {printf ("Bad password, failed to hang \ n");    }}void change () {int id;    int i;    int pass,pass1,pass2;    printf ("Please enter your account:");    scanf ("%d", &id);    I=search (ID);    printf ("Name:%s", user[i].name);    printf ("Password:");    Pass=inputpass ();        if (pass==user[i].password&&user[i].state!=2) {printf ("New password:");        Pass1=inputpass ();        printf ("Enter again:");        Pass2=inputpass ();        if (pass1==pass2) {user[i].password=pass1;        } else {printf ("2 times input is incorrect, password failed \ n"); }} else {printf ("The password is incorrect!    \ n ");    }}void Update () {FILE *p;    int i=0;        if ((P=fopen ("Bank.txt", "W")) ==null) {printf ("Bank.txt file cannot open!");    Exit (0); } for (i=0; i<n; i++) fprintf (p, "%d%s%d%lf%d\n", User[i].num, User[i].name, User[i].password, User[i].balan CeUser[i].state);    Fclose (P); Exit (0);}

#include <stdio.h> #include <string.h> #include <stdlib.h> #include <ctype.h> #include <    conio.h> #include "bank.h" int search (int id) {int index;    Index=-1;    int i;            for (i=0; i<n; i++) {if (user[i].num==id) {index=i;        Break }} return index;}  int Inputpass () {char ch;   Receive character form cipher int ipass=0;    To convert to a number int i;  while (1) {for (i=0; i<6; i++) {ch=getch ();   Enter but do not show Putchar (' * ');            Output * if (isdigit (CH)) ipass=ipass*10+ (ch-' 0 ');                else {ipass=0;  Break After exiting for loop, accept}} fflush (stdin) again;        Clears the input printf ("\ n") already in the keyboard buffer; if (ipass==0)//This condition may be caused by two cases: entered non-numeric characters are directly reset to 0, or 6-bit full 0 after the normal exit for loop {printf ("Password requirements are all numbers, and not all 0!")            \ n ");        printf ("Re-enter Password:");    } else break; } return iPass;}

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Advanced 21st class, practice, simplified Banking system Development Fourth edition