C language bank savings system source code

This paper shares the source code of C language bank savings system and realizes various functions of the bank for your reference. The specific content is as follows

#include <stdio.h> 
#include <stdlib.h> 
#include <conio.h> 
#include <string.h> 
void openaccount();// Open an account  
void save();// deposit  
void withdraw();// withdrawals  
void showAccount();// The query  
void transferAccounts();// transfer  
void reportLoss(); // Report the loss of  
void cancelLoss(); // Cancel the report the loss of  
void cancelAccount(); // The cancellation of the account  
void updatePassword();  // Change password  
int load();// Log in to your account  
int accountnum=0;// Defines global variables that are used to calculate the number of accounts  
int nowaccount=0;// Login successful account  
struct Bank 
{ 
  char account[20]; // account  
  char password[10]; // password  
  char name[20];  // The user name  
  int balance;// The account balance  
  int state;// state  
};  // The structure of the body  
struct Bank banks[100]; 
int load() 
{ 
  int right=0,i=0,j; 
  int r1,r2; 
  char ch; 
  char account1[20]= {0}; 
  char password1[10]= {0}; 
  printf(" landing \n Please enter your account number: \n"); 
  scanf("%s",account1); 
  printf(" Please enter your password: \n"); 
  while((ch=getch())!='\r') 
  { 
    password1[i++]=ch; 
    putchar('*'); 
  } 
  for(j=0; j<accountnum; j++) 
  { 
    r1=strcmp(account1,banks[j].account); 
    r2=strcmp(password1,banks[j].password); 
    if(r1==0&&r2==0) 
    { 
      nowaccount=j; 
      if(banks[j].state==0) 
      { 
        printf(" Login successful! \n");// Login successful  
        right=1; 
      } 
      else if(banks[j].state==1) 
      { 
        printf(" Your account is in the state of loss reporting , Please solution to hang \n"); 
        right=3; 
      } 
      else if(banks[j].state==2) 
      { 
        printf(" The account has been sold \n"); 
        right=2; 
      } 
      break; 
    } 
  } 
 
  if(right==0) 
    printf(" Login failed! \n"); 
  return right; 
} 
int main() 
{ 
  int i=0,num; 
  char a[100]; 
  FILE *fp; 
  if((fp=fopen("account.txt","r"))==NULL) 
  { 
    if((fp=fopen("account.txt","w"))==NULL) 
    { 
      printf(" Failure! \n"); 
      exit(1); 
    } 
  } 
  while(fscanf(fp,"%s%s%s%d%d",banks[i].account,banks[i].name,banks[i].password,&banks[i].balance,&banks[i].state)!=EOF) 
  { 
    accountnum++; 
    i++; 
  } 
  fclose(fp); 
  printf(" Welcome to my bank \n"); 
  while(1) 
  { 
    printf(" Please select business :\n"); 
    printf("1. Open an account   2. deposit   3. withdrawals \n"); 
    printf("4. The query   5. transfer   6. Report the loss of \n"); 
    printf("7. Solution to hang   8. Pin households   9. To close \n"); 
    printf("-1. exit \n"); 
    scanf("%s",a); 
    num=atoi(a); 
    if(num==1) 
      openaccount();// Open an account  
    else if(num==2) 
      save();// deposit  
    else if(num==3) 
      withdraw();// withdrawals  
    else if(num==4) 
      showAccount();// The query  
    else if(num==5) 
      transferAccounts();// transfer  
    else if(num==6) 
      reportLoss(); // Report the loss of  
    else if(num==7) 
      cancelLoss(); // Solution to hang  
    else if(num==8) 
      cancelAccount(); // The cancellation of the account  
    else if(num==9) 
      updatePassword();  // Change password  
    else if(num==-1) 
    { 
      printf(" Welcome back next time \n"); 
      break; 
    } 
 
    else 
      printf(" Sorry, there is no such service \n"); 
  } 
  if((fp=fopen("account.txt","w"))==NULL) 
  { 
    printf(" Failure! \n"); 
    exit(1); 
  } 
  for(i=0; i<accountnum; i++) 
  { 
    fprintf(fp,"%s\t%s\t%s\t%d\t%d\n",banks[i].account,banks[i].name,banks[i].password,banks[i].balance,banks[i].state); 
  } 
  fclose(fp); 
  return 0; 
} 
void openaccount() 
{ 
 
  int i=0,j=0; 
  int r; 
  char ch; 
  char password1[10]= {0}; 
  printf(" Account ( 10 Digits) : \n"); 
  scanf("%s",banks[accountnum].account); 
  while(banks[accountnum].account[i]!='\0') 
    i++; 
  if(i!=10) 
  { 
    printf(" Input account error \n"); 
    return; 
  } 
  i=0; 
  printf(" Name: \n"); 
  scanf("%s",banks[accountnum].name); 
  printf(" Password: \n"); 
  while((ch=getch())!='\r') 
  { 
    banks[accountnum].password[i++]=ch; 
    putchar('*'); 
  } 
  printf("\n"); 
  printf(" Enter your password again: \n"); 
  while((ch=getch())!='\r') 
  { 
    password1[j++]=ch; 
    putchar('*'); 
  } 
  printf("\n"); 
  r=strcmp(banks[accountnum].password,password1); 
  if(r!=0) 
  { 
 
    printf(" The password is not the same twice, the account opening fails! \n"); 
    return; 
  } 
  banks[accountnum].balance=0; 
  banks[accountnum].state=0; 
  accountnum++; 
  printf(" Successful opening an account \n"); 
} 
void save() 
{ 
  if(load()!=1) 
    return; 
  char addmoney[10];// Deposit amount  
  int money;// Converts the character type to int type  
  int i=0; 
  printf(" Deposit amount :\n"); 
  scanf("%s",addmoney); 
  while(addmoney[i]!='\0') 
  { 
    if(addmoney[i]<'0'||addmoney[i]>'9') 
    { 
      printf(" Input format error! \n"); 
      return; 
    } 
    i++; 
  } 
  while(addmoney[i]!='\0') 
  { 
    if(i>9) 
    { 
      printf(" The amount of overrun \n"); 
      return; 
    } 
    i++; 
  } 
  money=atoi(addmoney); 
  if(money==0) 
  { 
    printf(" Deposit failure \n"); 
    return; 
  } 
  else 
  { 
    banks[nowaccount].balance+=money; 
    printf(" Deposit successfully \n"); 
  } 
} 
void withdraw() 
{ 
  if(load()!=1) 
    return; 
  char reducemoney[10];// Withdrawal amount  
  int money,i=0; 
  printf(" Please enter the withdrawal amount \n"); 
  scanf("%s",reducemoney); 
  while(reducemoney[i]!='\0') 
  { 
    if(reducemoney[i]<'0'||reducemoney[i]>'9') 
    { 
      printf(" Input format error! \n"); 
      return; 
    } 
    i++; 
  } 
  while(reducemoney[i]!='\0') 
  { 
    if(i>9) 
    { 
      printf(" The amount of overrun \n"); 
      return; 
    } 
    i++; 
  } 
  money=atoi(reducemoney); 
  if(money==0) 
  { 
    printf(" Withdrawals failure \n"); 
    return; 
  } 
  else 
  { 
    if(money>banks[nowaccount].balance) 
      printf(" Your account doesn't have such a large balance , Withdrawals failure !\n"); 
    else 
    { 
      banks[nowaccount].balance-=money; 
      printf(" Withdrawals success \n"); 
    } 
  } 
} 
void showAccount() 
{ 
  if(load()!=1&&load()!=2) 
    return; 
  printf(" Your account information is as follows: \n"); 
  printf(" Account: %s\t Balance: %d\n",banks[nowaccount].account,banks[nowaccount].balance); 
} 
void transferAccounts() 
{ 
  if(load()!=1) 
    return; 
  char account1[20]; 
  int i,judge=0,money,a; 
  char tramoney[10]; 
  printf(" Please enter the account into which you transferred \n"); 
  scanf("%s",account1); 
  for(i=0; i<accountnum; i++) 
  { 
    if(strcmp(account1,banks[i].account)==0) 
    { 
      a=i; 
      judge=1; 
      break; 
    } 
  } 
  if(judge!=1) 
   { 
     printf(" This account was not found \n"); 
     return; 
   } 
  printf(" Please enter the transfer amount \n"); 
  scanf("%s",tramoney); 
  while(tramoney[i]!='\0') 
  { 
    if(tramoney[i]<'0'||tramoney[i]>'9') 
    { 
      printf(" Input format error! \n"); 
      return; 
    } 
    i++; 
  } 
  while(tramoney[i]!='\0') 
  { 
    if(i>9) 
    { 
      printf(" The amount of overrun \n"); 
      return; 
    } 
    i++; 
  } 
  money=atoi(tramoney); 
  if(money==0) 
  { 
    printf(" Transfer failed \n"); 
    return; 
  } 
  else 
  { 
    if(money>banks[nowaccount].balance) 
      printf(" Your account doesn't have such a large balance , Transfer failed !\n"); 
    else 
    { 
      banks[nowaccount].balance-=money; 
      banks[a].balance+=money; 
      printf(" Transfer success \n"); 
    } 
  } 
 
} 
void reportLoss() 
{ 
  if(load()!=1) 
    return; 
  banks[nowaccount].state=1; 
  printf(" Report the loss of success \n"); 
} 
void cancelLoss() 
{ 
  int judge=0; 
  if(load()==3) 
  { 
    printf(" Click to unhook immediately 1 , please press to exit 0\n"); 
    scanf("%d",&judge); 
    if(judge==1) 
    { 
      banks[nowaccount].state=0; 
      printf(" Solution to hang success \n"); 
    } 
 
  } 
  else if(load()==1) 
    printf(" Account is normal \n"); 
} 
void cancelAccount() 
{ 
  int r; 
  r=load(); 
  if(r==2) 
  { 
    printf(" The account has been sold \n"); 
    return; 
  } 
  else if(r==3||r==0) 
    return; 
  else if(r==1) 
  { 
    printf(" Please withdraw the balance of your account \n"); 
    banks[nowaccount].state=2; 
    banks[nowaccount].balance=0; 
    printf(" Cancellation of success \n"); 
  } 
} 
void updatePassword() 
{ 
  char newpassword1[10]= {0},newpassword2[10]= {0}; 
  int i=0,j=0,r; 
  char ch; 
  if(load()!=1) 
    return; 
  printf(" Please enter a new password \n"); 
  while((ch=getch())!='\r') 
  { 
    newpassword1[i++]=ch; 
    putchar('*'); 
  } 
  printf("\n"); 
  printf(" Enter your password again: \n"); 
  while((ch=getch())!='\r') 
  { 
    newpassword2[j++]=ch; 
    putchar('*'); 
  } 
  printf("\n"); 
  r=strcmp(newpassword1,newpassword2); 
  printf("r:%d",r); 
  if(r!=0) 
  { 
 
    printf(" Two passwords are not the same, change the secret failed! \n"); 
    return; 
  } 
  i=0; 
  while(newpassword1[i]!='\0') 
  { 
    banks[nowaccount].password[i]=newpassword1[i]; 
    i++; 
  } 
  printf(" Changes the secret success \n"); 
}