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Tip of the Day
Language: C++
Expertise: Beginner
Feb 3, 2000

WEBINAR:

On-Demand

Application Security Testing: An Integral Part of DevOps


Pointers to Vectors

Question:
How do you create an array of pointers to vectors? The different vectors will, eventually, have different lengths.

Answer:
You declare an array of pointers to vector like this:

  std::vector * vecptrarr[10];
Of course, you'll need to allocate the vector object at a later stage and assign addresses to the pointers in the array. I also recommend that you initialize the array to null pointers to avoid the dangers of dangling pointers:
  /* initialize all array members to 0 */
  std::vector * vecptrarr[10] ={0};
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