pFile = fopen ("myfile.txt",w)

FILE * pFile;
pFile = fopen ("myfile.txt",w)

I wonder what will be assigned to pFile? an address of ?
if "myfile.txt" is string is it
string is also an array
so array address will be assigned to pFile?

I did go thru pointer chapter.
pointer = store address of another variable.
So at the above case I wonder what pFile is storing ?
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So at the above case I wonder what pFile is storing ?

The variable that pFile points to is a 'FILE' struct. This struct contains information about the opened file and possibly some callbacks for i/o.

The 'FILE' struct is abstract, so you should not worry about the specifics. You don't need to know exactly what it contains, you should only know what its purpose is.
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fopen return a pointer to a stream.

[FILE] object type that identifies a stream and contains the information needed to control it, including a pointer to its buffer, its position indicator and all its state indicators.

The content of a FILE object is not meant to be accessed from outside the functions of the <cstdio> and <cwchar> headers;

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