create user-defined-filename file

[fooxianyang]

I'm a newbie in C++ and I'm cracking my head on this.
My lecturer want us to create a file with it's name define by user
itself

example :

program ask what file name the user would like to save ( juz like how
you save a new document in M.office)
ie, the user key in : abc.txt
thus a file name : abc.txt is created and retained for futher usage.

anybody have a solution to it?
It would be great!!!!!
A Million thanks in foware

 

[Jim Langston]

I'm a newbie in C++ and I'm cracking my head on this.
My lecturer want us to create a file with it's name define by user
itself

example :

program ask what file name the user would like to save ( juz like how
you save a new document in M.office)
ie, the user key in : abc.txt
thus a file name : abc.txt is created and retained for futher usage.

anybody have a solution to it?
It would be great!!!!!
A Million thanks in foware

What have you tried so far? Are you familiar with std::getline?
std::string? std:fstream ?

 

[fooxianyang]

What have you tried so far? Are you familiar with std::getline?
std::string? std:fstream ?

I've tried both... but it just wont compile.
nonetheless, i found a solution on other forum :

ofstream outFile( variable_file_name.c_str());

the above could created the file with variable value as name ( in this
case, variable_file_name)
but i'm not quite clear of the concept

 

[Jim Langston]

I've tried both... but it just wont compile.
nonetheless, i found a solution on other forum :

ofstream outFile( variable_file_name.c_str());

the above could created the file with variable value as name ( in this
case, variable_file_name)
but i'm not quite clear of the concept

The constructor for std:fstream accepts a const char* that is a pointer to
a c-style string of the filename to open. Such as:
std:fstream Bar( "MyFile.txt" );
std:fstream Bar( "file.ext" );
or whatever. In these cases the c-strings are constant.

Now, std::string has a method called c_str() that will point to the contents
of the string null terminated, which is what a c-style string is. A null
terminated array of characters. So, if we do:
std::string Foo = "MyFile.ext";
std:fstream Bar( Foo.c_str() );
Foo.c_str() returns a char pointer that will point to "MyFile.ext".

Clear?