Given `int *ptr = NULL;`, what is the most appropriate use for this pointer?
Understand the Problem
The question is asking about the significance of initializing an integer pointer to NULL in C/C++. Understanding the use of NULL pointers is crucial for preventing segmentation faults and ensuring proper memory management. The question requires selecting the most appropriate use from the given options.
Answer
Initialize the pointer, indicating that it does not point to a valid memory location initially.
The most appropriate use for int *ptr = NULL; is to initialize the pointer, indicating that it does not point to a valid memory location initially. This prevents it from containing a garbage address and causing unexpected behavior.
Answer for screen readers
The most appropriate use for int *ptr = NULL; is to initialize the pointer, indicating that it does not point to a valid memory location initially. This prevents it from containing a garbage address and causing unexpected behavior.
More Information
A null pointer doesn't point to any valid memory address. Assigning NULL to a pointer is a good practice, especially when the pointer's actual target is not yet known.
Tips
A common mistake is dereferencing a null pointer, which leads to undefined behavior and potential program crashes.
Sources
- NULL Pointer in C - GeeksforGeeks - geeksforgeeks.org
- NULL Pointer in C++ - GeeksforGeeks - geeksforgeeks.org
- Why do we need int *ptr = NULL;? - Stack Overflow - stackoverflow.com
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