我必须分开。此代码有效。但是，每个类定义都在其自己的头文件（.h）中，每个类成员函数定义在其自己的源文件（.C）中，而程序应用程序在其自己的源文件中。我不知道该怎么做。它没有完全连接。
我收到以下错误：
C：\ Users \ Jay Yoon \ OneDrive-Parkland College \ Desktop \ project2.cpp | 48 |错误：在此范围内未声明'write_account'
#include<iostream>
#include<fstream>
#include<cctype>
#include<iomanip>
#include <stdlib.h>
using namespace std;
// CLASS USED IN PROJECT
class account
{
int acno;
char name[50];
int deposit;
int ssn;
char address[50];
int intRate;
public:
void create_account(); //function to get data from user
void show_account() const; //function to show data on screen
void dep(int); //function to accept amount and add to balance amount
void draw(int); //function to accept amount and subtract from balance amount
void report() const; //function to show data in tabular format
int retacno() const; //function to return account number
int retdeposit() const; //function to return balance amount
int retssn() const; //function to return ssn of account
int retintRate() const;
}; //class ends here
void account::create_account()
{
cout<<"\nEnter The account No. :";
cin>>acno;
cout<<"\n\nEnter The Name of The account holder : ";
cin.ignore();
cin.getline(name,50);
cout<<"\n\nEnter The Address of The account holder : ";
cin.ignore();
cin.getline(address,50);
cout<<"\nEnter SSN of The account : ";
cin>>ssn;
ssn=toupper(ssn);
cout<<"\nEnter The Initial amount(>=500 for Saving and >=1000 for current ) : ";
cin>>deposit;
cout<<"\nEnter The Interest Rates : ";
cin>>intRate;
cout<<"\n\n\nAccount Created..";
}
void account::show_account() const
{
cout<<"\nAccount No. : "<<acno;
cout<<"\nAccount Holder Name : "<<name;
cout<<"\nAccount Holder's address : "<<address;
cout<<"\nSSN of Account : "<<ssn;
cout<<"\nBalance amount : "<<deposit;
cout<<"\nInterest Rate : "<<intRate;
cout<<"\nTotal Balance : "<<deposit+deposit*intRate;
}
void account::dep(int x)
{
deposit+=x;
}
void account::draw(int x)
{
deposit-=x;
}
void account::report() const
{
cout<<acno<<setw(8)<<" "<<name<<setw(6)<<" "<<ssn<<setw(6)<<" "<<address<<setw(17)<<" "<<deposit+deposit*intRate/100<<setw(16)<<intRate<<endl;
}
int account::retacno() const
{
return acno;
}
int account::retdeposit() const
{
return deposit;
}
int account::retssn() const
{
return ssn;
}
int account::retintRate() const
{
return intRate;
}
// function declaration
void write_account(); //function to write record in binary file
void display_sp(int); //function to display account details given by user
void display_all(); //function to display all account details
void deposit_withdraw(int, int); // function to desposit/withdraw amount for given account
// Main function
int main()
{
char ch;
int num;
do
{
system("cls");
cout<<"----------------------------------------";
cout<<"\nWelcome to the First National Bank\n" << "of Parkland - Account transaction system ";
cout<<"\n----------------------------------------";
cout<<"\n\n\t01. Create Account";
cout<<"\n\n\t02. Deposit";
cout<<"\n\n\t03. Withdraw";
cout<<"\n\n\t04. Select Account";
cout<<"\n\n\t05. Print Accounts";
cout<<"\n\n\t06. Quit";
cout<<"\n\n\tSelect Your Option (1-6) ";
cin>>ch;
system("cls");
switch(ch)
{
case '1':
write_account();
break;
case '2':
cout<<"\n\n\tEnter The account No. : "; cin>>num;
deposit_withdraw(num, 1);
break;
case '3':
cout<<"\n\n\tEnter The account No. : "; cin>>num;
deposit_withdraw(num, 2);
break;
case '4':
cout<<"\n\n\tEnter The account No. : "; cin>>num;
display_sp(num);
break;
case '5':
display_all();
break;
case '6':
cout<<"\n\n\tThanks for using bank managemnt system";
break;
default :cout<<"\a";
}
cin.ignore();
cin.get();
}while(ch!='8');
return 0;
}
// function to write in file
void write_account()
{
account ac;
ofstream outFile;
outFile.open("account.dat",ios::binary|ios::app);
ac.create_account();
outFile.write(reinterpret_cast<char *> (&ac), sizeof(account));
outFile.close();
}
// function to read specific record from file
void display_sp(int n)
{
account ac;
bool flag=false;
ifstream inFile;
inFile.open("account.dat",ios::binary);
if(!inFile)
{
cout<<"File could not be open !! Press any Key...";
return;
}
cout<<"\nBALANCE DETAILS\n";
while(inFile.read(reinterpret_cast<char *> (&ac), sizeof(account)))
{
if(ac.retacno()==n)
{
ac.show_account();
flag=true;
}
}
inFile.close();
if(flag==false)
cout<<"\n\nAccount number does not exist";
}
// function to display all accounts deposit list
void display_all()
{
account ac;
ifstream inFile;
inFile.open("account.dat",ios::binary);
if(!inFile)
{
cout<<"File could not be open !! Press any Key...";
return;
}
cout<<"\n\n\t\tACCOUNT HOLDER LIST\n\n";
cout<<"=========================================================================================\n";
cout<<"A/c no. NAME SSN Address Total Balance Interest Rate\n" ;
cout<<"=========================================================================================\n";
while(inFile.read(reinterpret_cast<char *> (&ac), sizeof(account)))
{
ac.report();
}
inFile.close();
}
// function to deposit and withdraw amounts
void deposit_withdraw(int n, int option)
{
int amt;
bool found=false;
account ac;
fstream File;
File.open("account.dat", ios::binary|ios::in|ios::out);
if(!File)
{
cout<<"File could not be open !! Press any Key...";
return;
}
while(!File.eof() && found==false)
{
File.read(reinterpret_cast<char *> (&ac), sizeof(account));
if(ac.retacno()==n)
{
ac.show_account();
if(option==1)
{
cout<<"\n\n\tTO DEPOSITE AMOUNT ";
cout<<"\n\nEnter The amount to be deposited";
cin>>amt;
ac.dep(amt);
}
if(option==2)
{
cout<<"\n\n\tTO WITHDRAW AMOUNT ";
cout<<"\n\nEnter The amount to be withdraw";
cin>>amt;
int bal=ac.retdeposit()-amt;
if((bal<500 && ac.retssn()=='S') || (bal<1000 && ac.retssn()=='C'))
cout<<"Insufficience balance";
else
ac.draw(amt);
}
int pos=(-1)*static_cast<int>(sizeof(ac));
File.seekp(pos,ios::cur);
File.write(reinterpret_cast<char *> (&ac), sizeof(account));
cout<<"\n\n\t Record Updated";
found=true;
}
}
File.close();
if(found==false)
cout<<"\n\n Record Not Found ";
}
我该如何解决？
答案 0 :(得分：1)
就这么简单：
main.cpp：
#include <iostream>
#include <fstream>
#include <cctype>
#include <iomanip>
#include <stdlib.h>
#include "account.h"
using namespace std;
// function declaration
void write_account(); //function to write record in binary file
void display_sp(int); //function to display account details given by user
void display_all(); //function to display all account details
void deposit_withdraw(int, int); // function to desposit/withdraw amount for given account
// Main function
int main()
{
char ch;
int num;
do
{
system("cls");
cout<<"----------------------------------------";
cout<<"\nWelcome to the First National Bank\n" << "of Parkland - Account transaction system ";
cout<<"\n----------------------------------------";
cout<<"\n\n\t01. Create Account";
cout<<"\n\n\t02. Deposit";
cout<<"\n\n\t03. Withdraw";
cout<<"\n\n\t04. Select Account";
cout<<"\n\n\t05. Print Accounts";
cout<<"\n\n\t06. Quit";
cout<<"\n\n\tSelect Your Option (1-6) ";
cin>>ch;
system("cls");
switch(ch)
{
case '1':
write_account();
break;
case '2':
cout<<"\n\n\tEnter The account No. : "; cin>>num;
deposit_withdraw(num, 1);
break;
case '3':
cout<<"\n\n\tEnter The account No. : "; cin>>num;
deposit_withdraw(num, 2);
break;
case '4':
cout<<"\n\n\tEnter The account No. : "; cin>>num;
display_sp(num);
break;
case '5':
display_all();
break;
case '6':
cout<<"\n\n\tThanks for using bank managemnt system";
break;
default :cout<<"\a";
}
cin.ignore();
cin.get();
}while(ch!='8');
return 0;
}
// function to write in file
void write_account()
{
account ac;
ofstream outFile;
outFile.open("account.dat",ios::binary|ios::app);
ac.create_account();
outFile.write(reinterpret_cast<char *> (&ac), sizeof(account));
outFile.close();
}
// function to read specific record from file
void display_sp(int n)
{
account ac;
bool flag=false;
ifstream inFile;
inFile.open("account.dat",ios::binary);
if(!inFile)
{
cout<<"File could not be open !! Press any Key...";
return;
}
cout<<"\nBALANCE DETAILS\n";
while(inFile.read(reinterpret_cast<char *> (&ac), sizeof(account)))
{
if(ac.retacno()==n)
{
ac.show_account();
flag=true;
}
}
inFile.close();
if(flag==false)
cout<<"\n\nAccount number does not exist";
}
// function to display all accounts deposit list
void display_all()
{
account ac;
ifstream inFile;
inFile.open("account.dat",ios::binary);
if(!inFile)
{
cout<<"File could not be open !! Press any Key...";
return;
}
cout<<"\n\n\t\tACCOUNT HOLDER LIST\n\n";
cout<<"=========================================================================================\n";
cout<<"A/c no. NAME SSN Address Total Balance Interest Rate\n" ;
cout<<"=========================================================================================\n";
while(inFile.read(reinterpret_cast<char *> (&ac), sizeof(account)))
{
ac.report();
}
inFile.close();
}
// function to deposit and withdraw amounts
void deposit_withdraw(int n, int option)
{
int amt;
bool found=false;
account ac;
fstream File;
File.open("account.dat", ios::binary|ios::in|ios::out);
if(!File)
{
cout<<"File could not be open !! Press any Key...";
return;
}
while(!File.eof() && found==false)
{
File.read(reinterpret_cast<char *> (&ac), sizeof(account));
if(ac.retacno()==n)
{
ac.show_account();
if(option==1)
{
cout<<"\n\n\tTO DEPOSITE AMOUNT ";
cout<<"\n\nEnter The amount to be deposited";
cin>>amt;
ac.dep(amt);
}
if(option==2)
{
cout<<"\n\n\tTO WITHDRAW AMOUNT ";
cout<<"\n\nEnter The amount to be withdraw";
cin>>amt;
int bal=ac.retdeposit()-amt;
if((bal<500 && ac.retssn()=='S') || (bal<1000 && ac.retssn()=='C'))
cout<<"Insufficience balance";
else
ac.draw(amt);
}
int pos=(-1)*static_cast<int>(sizeof(ac));
File.seekp(pos,ios::cur);
File.write(reinterpret_cast<char *> (&ac), sizeof(account));
cout<<"\n\n\t Record Updated";
found=true;
}
}
File.close();
if(found==false)
cout<<"\n\n Record Not Found ";
}
account.h：
#pragma once
class account
{
int acno;
char name[50];
int deposit;
int ssn;
char address[50];
int intRate;
public:
void create_account(); //function to get data from user
void show_account() const; //function to show data on screen
void dep(int); //function to accept amount and add to balance amount
void draw(int); //function to accept amount and subtract from balance amount
void report() const; //function to show data in tabular format
int retacno() const; //function to return account number
int retdeposit() const; //function to return balance amount
int retssn() const; //function to return ssn of account
int retintRate() const;
};
account.cpp：
#include "account.h"
#include <iostream>
#include <iomanip>
using namespace std;
void account::create_account()
{
cout<<"\nEnter The account No. :";
cin>>acno;
cout<<"\n\nEnter The Name of The account holder : ";
cin.ignore();
cin.getline(name,50);
cout<<"\n\nEnter The Address of The account holder : ";
cin.ignore();
cin.getline(address,50);
cout<<"\nEnter SSN of The account : ";
cin>>ssn;
ssn=toupper(ssn);
cout<<"\nEnter The Initial amount(>=500 for Saving and >=1000 for current ) : ";
cin>>deposit;
cout<<"\nEnter The Interest Rates : ";
cin>>intRate;
cout<<"\n\n\nAccount Created..";
}
void account::show_account() const
{
cout<<"\nAccount No. : "<<acno;
cout<<"\nAccount Holder Name : "<<name;
cout<<"\nAccount Holder's address : "<<address;
cout<<"\nSSN of Account : "<<ssn;
cout<<"\nBalance amount : "<<deposit;
cout<<"\nInterest Rate : "<<intRate;
cout<<"\nTotal Balance : "<<deposit+deposit*intRate;
}
void account::dep(int x)
{
deposit+=x;
}
void account::draw(int x)
{
deposit-=x;
}
void account::report() const
{
cout<<acno<<setw(8)<<" "<<name<<setw(6)<<" "<<ssn<<setw(6)<<" "<<address<<setw(17)<<" "<<deposit+deposit*intRate/100<<setw(16)<<intRate<<endl;
}
int account::retacno() const
{
return acno;
}
int account::retdeposit() const
{
return deposit;
}
int account::retssn() const
{
return ssn;
}
int account::retintRate() const
{
return intRate;
}