buffer searching problem

ok i have tried to get the following piece of code to go from 1 line of char's in a buffer to the next, check to see if the first 6 lines match and if so print out the line

however i am don't know why it dosen't print out correctly

Code:

// Cfunctions.cpp: implementation of the functions class.
//
//////////////////////////////////////////////////////////////////////

#include "functions.h"
#include <iostream>
#include <windows.h>
#include <fstream.h>
#include <conio.h>
#include <stdlib.h>

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

Cfunctions::Cfunctions()
{

}

Cfunctions::~Cfunctions()
{

}

Cfunctions::Printall()
{
	system("cls"); 

	ifstream file;
	file.open("flight.txt",ios::nocreate);

	if(!file)
		return -1;
	
	while(file && !file.eof()) 
	{ 
                file.get(ch); 

		switch(ch)
		{
			case '~': 
			case '%': 
			case '#':
				ch = 0;
				break;		
                                 }
	        cout << ch << flush;
	}			 

	file.close(); 
	getch(); 

	return 0;
}

int Cfunctions::Flightdetails()
{
	cout << "Please enter flight number" << endl;
	cin >> flightno;
	system("cls");

	ifstream is("flight.txt",ios::nocreate);
	if(!is)
		return -1;

	
	char buffer[48];
	char buffer2[48];
	
	do 
	{
		is.getline(buffer,48, '#');
		if (buffer[0] == flightno[0])
		{
			if (buffer[1] == flightno[1])
			{
				if (buffer[2] == flightno[2])
				{
					if (buffer[3] == flightno[3])
					{
						if (buffer[4] == flightno[4])
						{
							if (buffer[5] == flightno[5])
							{
								cout << buffer << endl;
							}
						}
					}
				}
			}
		}
		else 
		{
			if (n == 0)
			{
				is.seekg(45, ios::beg);
				n++;
			}
			else
			{
				is.seekg(45, ios::cur);
			}
		}
		
	}while(is && !is.eof());	

	is.close();

        return 0;
}

Originally Posted by chris285

ok i have tried to get the following piece of code to go from 1 line of char's in a buffer to the next, check to see if the first 6 lines match and if so print out the line

however i am don't know why it dosen't print out correctly

Code:

		if (buffer[0] == flightno[0])
		{
			if (buffer[1] == flightno[1])
			{
				if (buffer[2] == flightno[2])
				{
					if (buffer[3] == flightno[3])
					{
						if (buffer[4] == flightno[4])
						{
							if (buffer[5] == flightno[5])
							{
								cout << buffer << endl;
							}
						}
					}
				}
			}
		}

There's definitely a better way to go about comparing strings. Speaking of which, why are you working with C-style strings instead of using the string class?

its the only way i know how to use strings

problem i have is it dosen't move forward and therfore seek properly, and outputting what it should