Strange errors related to getline()...

[CoffeeAddict19]

Basically what I'm trying to do is open up a file, check to see if everything is ok, and then get a line from the file and pop up a box with the text from the getline(). Then I got all these errors upon compiling. The line which the errors are pointing to is marked with a smilie. I don't really know what to do with them so I'd appreciate any help. The code:

bool CRatiosNewSearchDialog::LoadExpressionsFile(CString Path)
{
	bool Success = true;
	CString FirstLineText = "";
	
	ifstream expressionFInput(Path); //open up file, should automatically close too
	if(expressionFInput.fail()) //see if it's missing or not
	{
		MessageBox("Could not load expressions file: " + (CString)Path, "Error", MB_ICONWARNING);
		Success = false;
	}
	else if(EOF == expressionFInput.peek()) //check if the file is empty
	{
		MessageBox("Expressions file is empty: " + (CString)Path, "Error", MB_ICONWARNING);
		Success = false;
	}
	else //everything is cool if we got this far
	{
		:^)getline(expressionFInput, FirstLineText, '\n');
		MessageBox(FirstLineText, "First Line", MB_OK);
	}

	return Success;
}

These are the errors: \Work\Copy of Ratios_2006\Ratios\ratios_searchdialogs.cpp(58): error C2780: 'std::basic_istream<_Elem,_Traits> &std::getline(std::basic_istream<_Elem,_Traits> &,std::basic_string<_Elem,_Traits,_Alloc> &)' : expects 2 arguments - 3 provided \Work\Copy of Ratios_2006\Ratios\ratios_searchdialogs.cpp(58): error C2784: 'std::basic_istream<_Elem,_Traits> &std::getline(std::basic_istream<_Elem,_Traits> &,std::basic_string<_Elem,_Traits,_Alloc> &,const _Elem)' : could not deduce template argument for 'std::basic_istream<_Elem,_Traits> &' from 'std::ifstream' \Work\Copy of Ratios_2006\Ratios\ratios_searchdialogs.cpp(58): error C2784: 'std::basic_istream<_Elem,_Traits> &std::getline(std::basic_istream<_Elem,_Traits> &,std::basic_string<_Elem,_Traits,_Alloc> &,const _Elem)' : could not deduce template argument for 'std::basic_string<_Elem,_Traits,_Ax> &' from 'CString' I'd appreciate any help. -John

[Newbie00]

CoffeeAddict19 wrote:

expects 2 arguments - 3 provided

This is the answer. Look at the first error message.

[CoffeeAddict19]

getline(expressionFInput, FirstLineText); same error. :/ It doesn't care whether I have 3 arguments or two. Go figure.

[Newbie00]

You've provided 2 arguments. Does the compiler say that you have provided 3??? :O:O Strange thing. Have you rebuilt the project or just proper cpp?

[Newbie00]

Anyway if the error occurs after your change it means tha you have used wrong arguments check 2 another errors from your first post. Try to use istream instead of ifstream and string instead of CString

[CoffeeAddict19]

Yes. I rebuilt it. :) I hate Microsoft. e:\Work\Ratios\ratios_searchdialogs.cpp(61): error C2780: 'std::basic_istream<_Elem,_Traits> &std::getline(std::basic_istream<_Elem,_Traits> &,std::basic_string<_Elem,_Traits,_Alloc> &,const _Elem)' : expects 3 arguments - 2 provided

[CoffeeAddict19]

I gave in and did it with a string...works fine. Thanks. Still annoys me the though. Has anyone written a defenitive guide on how all of these character and string formats work together? Has anyone done a performance analysis on the different types of strings and their functions to see what works fastest in what appication? Seems like someone could write a book on it.