Class does not name a type.

[Mapler]

Yes, I've searched high and low for the answer but none seemed to be for this particular problem. The compiler says that ReadFile does not name a type while it is obviously defined in the header file. Why is it doing this? I am practicing inheritance with the file stream classes, making the class able to store integers or characters in files. Integers/character arrays are separated by a %% in the file. display.h contains the class declarations and prototypes and display.cpp contains the definition and main.

//display.h
#ifndef DISPLAY_H
#define DISPLAY_H

#include <iosfwd>
#include <fstream>

class ReadFile: public std::ifstream{
private:
	ReadFile(const ReadFile& r){}
public:
	ReadFile(const char* fileName);
	ReadFile& operator>>(int& param);
	ReadFile& operator>>(char *c);
};

class OutFile: public std::ofstream{
private:
	OutFile(const OutFile& o){}
public:
	OutFile(const char* fileName);
	OutFile& operator<<(const int& i);
	OutFile& operator<<(const char* c);
};

class Sprite{
private:
	char* m_sprite;
	int m_width;
	int m_height;
public:
	Sprite(const char* sprite, int width, int height);
};

#endif 

//display.cpp
#include "display.h"
#include <iostream>
#include <fstream>

using std::ifstream;

ReadFile::ReadFile(const char* fileName){
	ifstream::open(fileName);
	if(ifstream::fail()){
		throw "Issue reading file";
	}
}

ReadFile& ReadFile::operator>>(int& param){
	/*r is simply for holding the extracted characters
	 */
	char r[16];
	r[0] = ifstream::get();
	
	for(int i = 1; r[i] != '%' && r[i-1] !=  '%'; ++i){
		
		if(i == 16){
			throw "%% trigger not found";
		}
		r[i] = ifstream::get();
	}
	
	int temp = 0;
	int streamsize = 1;
	for(int count = 1; r[count] != '%'; ++count){
		streamsize = streamsize * 10;
		if(r[count] == '%')
			r[count] = '\0';
	}


	for(int count = 0; r[count]; ++count){
		
		if(int(r[count]) < 48 || int(r[count]) > 57)
			throw "Invalid conversion to integer";
		
		temp += ( static_cast<int>(r[count]) - 48 ) * streamsize;
		streamsize /= 10;
	}
	
	param = temp;
	return *this;
}


ReadFile& ReadFile::operator>>(char* c){
	c[0] = ifstream::get();
	for(int i = 1; i < 32767; ++i){
		c[i] = ifstream::get();
		
		if(c[i] == '%' && c[i-1] == '%'){
			c[i-1] = '\0';
			c[i] = '\0';
			break;
		}
	}
	return *this;
}


using std::ofstream;

OutFile::OutFile(const char* fileName){
	ofstream::open(fileName);
	if(ofstream::fail())
		throw "Cannot write to file";
}

OutFile& OutFile::operator<<(const int& i){
	for(int digit = 100000000; digit > 0; digit /= 10)
		ofstream::operator<<( static_cast<char>(48 + i / digit) );
	
	ofstream::operator<<( "%%");
	return *this;
}

OutFile& OutFile::operator<<(const char* c){
	ofstream::operator<<(c);
	ofstream::operator<<("%%");
	return *this;
}

Sprite::Sprite(const char* sprite, int width, int height){
	m_width = width;
	m_height = height;
	m_sprite = new char[width * height + 1];
	for(int i = 0; sprite[i]; ++i)
		m_sprite[i] = sprite[i];
}

int main(){
	OutFile editSprite("sprite.dat");
	editSprite << " + +++ + ";
	editSprite.close();
	
	OutFile numbers("numbers.txt");
	numbers << 5423 << 343;
	numbers.close();
	
	ReadFile read("numbers.txt");
	int data;
	read >> data;
	std::cout << data << std::endl;
	read >> data;
	std::cout << data << std::endl;
	std::cin.get();
	return 0;
}

whenever I try to compile it, I get the following errors:

'ReadFile' does not name a type
ReadFile& ReadFile::operator>>(int& param){
^
'ReadFile' does not name a type
ReadFile& ReadFile::operator>>(char* c){
^
In function 'int main()':
expected ';' before 'read'
ReadFile read("numbers.txt");
^
'read' was not declared in this scope
read >> data;
^

[mbozzi]

Is DISPLAY_H already defined?

Except for the extra definition on line 89 (of Sprite::Sprite), your code appears to compile (and crash, FWIW):
http://coliru.stacked-crooked.com/a/ab4ab6d4e9ec4ea6

[Mapler]

DISPLAY_H isn't defined anywhere else but in the header. It shouldn't have anything to do with the issue since removing the header guard results in the same errors. As for Sprite::Sprite, I shortened the header file to make it easier to read but cut out the class by accident.

Update: I should have mentioned that there was a defined inline function to clear the screen in the header file that depended on windows.h. Now it compiles fine without it, though I have no idea why it didn't before.