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Tip of the Day
Home » Tip Bank » C++
Language: C++
Expertise: Beginner
Mar 13, 1998

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Pointers' content reset

Question:
I've declared a pointer to integer in file A of project. The pointer is also being used by file B of the same project. I discovered that the pointer's value (i.e. the address which it's pointing to) is reset to a value of NULL when it enters file B. The program is stepped thru. What can be the possible cause?

Answer:
C/C++ will not reset global variables when moving from one function to another. You must have something else happening here. My best guess is that you have actually declared the point twice, possibly by including a header file twice that declares it for both file A and B.

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