problems flushing input stream

[ttqtrang146]

These are my examples:

/*int WriteFile(const char* file_name)
{
	fstream file;

	try
	{
		file.open(file_name,ios.out);

		file << "67";
		//file << "I miss you very much.";

		file.close();
	}
	catch(exception& e)
	{
		cout << e.what();

		return 1;
	}

	return 0;
}*/

/*int ReadFile(const char* file_name)
{
	fstream file;

	file.open(file_name,ios.in);

	if(file.is_open())
	{
		string data;

		while(!file.eof())
		{
			getline(file,data,cin.widen('\n'));
			cout << data << '\n';
		}

		file.close();
	}
	else
	{
		cout << "Unable to open file!\n";

		return 1;
	}

	return 0;
}*/

int ReadFile(const char* file_name)
{
	fstream file(file_name,ios.in|ios.binary|ios.ate);

	if(file.is_open())
	{
		fstream::pos_type size=file.tellg();

		char* data_block=new char[int(size)+1];

		file.seekg(0,ios.beg);

		file.read(data_block,size);

		data_block[size]=0;

		file.close();

		cout << data_block << "(" << size << ")" << "\n";
		cout << "Read file successfully!\n";

		delete []data_block;
	}
	else
	{
		cout << "Unable to open file!\n";

		return 1;
	}

	return 0;
}

int WriteFile(const char* file_name)
{
	fstream file(file_name,ios.out|ios.binary);

	if(file.is_open())
	{
		string data_block="I know I succeed!";
		
		file.write(data_block.c_str(),data_block.length());

		file.close();

		cout << data_block << "(" << data_block.length() << ")" << "\n";
		cout << "Write file successfully!\n";
	}
	else
	{
		cout << "Unable to open file!\n";

		return 1;
	}

	return 0;
}

int ObtainFileSize(const char* file_name)
{
	fstream file(file_name,ios.in);

	if(file.is_open())
	{
		int begin, end;
		
		begin=file.tellg();
		
		file.seekg(begin,ios.end);

		end=file.tellg();

		file.close();

		//cout << begin << "\n";
		//cout << end << "\n";

		return end-begin;
	}
	else
	{
		cout << "Unable to open file!\n";
		
		return -1;
	}
}

int main()
{	
	/*string str;
	
	cout << "Enter file name: ";
	
	getline (cin,str,cin.widen('\n'));

	char* file_name=new (nothrow) char[str.length()+1];
	
	if(file_name==0)
	{
		cout << "Error: Memory could not be allocated!\n";
	}
	else
	{
		strcpy(file_name,str.c_str());
		
		WriteFile(file_name);
		ReadFile(file_name);
	
		delete[] file_name;
	}*/

	string file_name;
	
	cout << "Enter file name: ";
	
	getline (cin,file_name);

	WriteFile(file_name.c_str());		
	ReadFile(file_name.c_str());

	if(ObtainFileSize(file_name.c_str())>=0)
	{
		cout << "File size is " << ObtainFileSize(file_name.c_str()) << " bytes\n";
	}

	getch();

	return 0;
}

[Ancient Dragon]

You forgot to tell us what the problem is that that code.

[Nick Evan]

You forgot to tell us what the problem is that that code.

I think this post was split of from the sticky 'how do I flush the input stream' thread. So perhaps the poster was just giving some suggestions? (although it has nothing to do with flushing the input-stream)