c++あるファイルフォーマットの読み取りと書き込みの例[stl]

ファイル形式は次のとおりです.
nupt 1#123 sdsds 56#地方第三者地nupt 2#12 sdsdsd 56#地方第三者
nupt3  #   123df6  #   etdfdfdf nupt4  #   123s6  #   dfdfdfdfdf nupt5  #   123df56  #   dfdfdfdfdfdf
nupt6   #   123456  #   dfdf nupt8   #   123456  #   dfdfdfdfdffdfdf
C++読み込みの例は次のとおりです.

#pragma warning(disable:4786)
#include <iostream>
#include <fstream>
#include <string>
#include <vector>
#include <algorithm>
using namespace std;
#define ReadNumber 10
class CSDNUser
{
public:
	string username;
	string password;
	string email;
};
typedef vector<CSDNUser> CSDNUSER;
int ReadIn(int ReadOfNumber,CSDNUSER &m_Userdata)
{
	ifstream ifile("cadn.sql");
	if(!ifile)
	{
		cout<<"csdn data cannot be opened!"<<endl;
		return 0;
	}
	char ch;
	int i;
	for (i=0;i<ReadOfNumber;i++)//    
	{
		if(!ifile.get(ch))
		{
            cout<<"      ！"<<endl;
			return 0;
		}
		while (ch!='#')//     
		{
			if (ch==' ')//    
			{
				ifile.get(ch);
				continue;
			}
			m_Userdata[i].username+=ch;
			ifile.get(ch);
		}
		ifile.get(ch);
		while (ch!='#')//    
		{
			if (ch==' ')
			{
				ifile.get(ch);//    
				continue;
			}
			m_Userdata[i].password+=ch;
			ifile.get(ch);
		}
		ifile.get(ch);
		while(ch!='
')//    
		{
			if (ch==' ')
			{
				ifile.get(ch);
				continue;
			}
            m_Userdata[i].email+=ch;
			ifile.get(ch);
		}
	}
	ifile.close();
	return 1;
}
void OutPut(const CSDNUser &prUser)
{
	cout<<prUser.username<<" "<<prUser.password<<" "<<prUser.email<<endl;

}
void MyFind(const CSDNUser &prUser)
{
	if (prUser.username=="nupt1")
	{
		cout<<"-------------------------    ！"<<endl;
		cout<<prUser.username<<" "<<prUser.password<<" "<<prUser.email<<endl;
	}
}
bool WriteFile(CSDNUSER temp)
{
	ofstream ofile("cadn.sql",ios::app|ios::out);
	if (!ofile)
	{
		cout<<"      ！"<<endl;
		return false;
	}
	CSDNUSER::iterator m_iterator;
	for (m_iterator=temp.begin();m_iterator!=temp.end();m_iterator++)
	{
		ofile<<m_iterator->username<<'#'
			 <<m_iterator->password<<'#'
			 <<m_iterator->email<<endl;
	}
	ofile.close();
	return true;
}
int main()
{
	CSDNUSER m_Userdata(ReadNumber);
    if (!ReadIn(ReadNumber,m_Userdata))
    {
		cout<<"
   ！"<<endl;
		return -1;
    }
	for_each(m_Userdata.begin(),m_Userdata.end(),OutPut);
	for_each(m_Userdata.begin(),m_Userdata.end(),MyFind);
    WriteFile(m_Userdata);
	for_each(m_Userdata.begin(),m_Userdata.end(),OutPut);
	return 1;
}