Thread: Opening a textfile with user supplied filename

I am writing a simple text file manipulation program and am getting the following errors from gcc:

file converter.cpp: In function ‘int main()’:
file converter.cpp:32: error: no matching function for call to ‘std::basic_ifstream<char, std::char_traits<char> >::basic_ifstream(std::string*)’

line 32 in my program is:

ifstream inf(startdate);

where startdate is a string class.

file converter.cpp:39: error: no matching function for call to ‘std::basic_ofstream<char, std::char_traits<char> >::basic_ofstream(std::string&, const std::_Ios_Openmode&)’

line 39 in my program is:

ofstream outf(asxcode, ios::app);

Where asxcode is a string class.


If passing a string is illegal how do I use a user supplied filename?

Thanks,
BeerGut

you are correct that both ifstream and ofstream does not accept type "string" in the constructor, it must be a "c-style string". you can use the "c_str" function, ie "mystring.c_str()" to get the c-string of the given "string".

Ok I did that, now I'm getting all sorts of complaints about undefined references to string, stringstream, ostream etc.

At the end gcc gives me:

collect2: ld returned 1 exit status

Any ideas whats going wrong?

Thanks,
BeerGut

Thanks it compiles.

Now I have some programming errors to rectify.
I'm getting somewhere now.