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Assign NULL to stream objects

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# 1  
Old 12-10-2009
Question Assign NULL to stream objects
Hi,
I am trying to initialize fstream objects to NULL but its throwing an error.Could somebody tell me better way to do this.
I have code in C++ & compiling it using g++ compiler on a Linux box.


Code:
 
ifstream file;
file=NULL;

error

Code:
 
omega.cpp:38: error: no match for 'operator=' in '((OMEGA*)this)->OMEGA::file = 0'
/usr/lib/gcc/i386-redhat-linux/3.4.3/../../../../include/c++/3.4.3/iosfwd:90: note: candidates are: std::basic_ifstream<char, std::char_traits<char> >& std::basic_ifstream<char, std::char_traits<char> >::operator=(const std::basic_ifstream<char, std::char_traits<char> >&)

# 2  
Old 12-10-2009
That operation does not even make sense. What are you trying to do -- what is the goal here?
# 3  
Old 12-10-2009
I think you may want an ifstream pointer, not an ifstream object. The pointer can be set to NULL, the object itself can not.
# 4  
Old 12-11-2009
Question
The puprose I am doing that is assign a NULL value to the object & check this object against NULL value in the next operations like while opening & checking errors in opening.

Could anybody tell me better way to do this?
# 5  
Old 12-12-2009
What does 'assign a null value to the object' even mean? The concept continues to make no sense. It doesn't "become null" either. You need to learn the basics.
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