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Questions and Answers
What is the primary purpose of the Record class's destructor?
What is the primary purpose of the Record class's destructor?
In the split function of the Record class, which task is NOT mentioned as a requirement?
In the split function of the Record class, which task is NOT mentioned as a requirement?
Which of the following statements accurately describes the role of the fields member in the Record class?
Which of the following statements accurately describes the role of the fields member in the Record class?
What must the Record class implement to avoid memory leaks when an object goes out of scope?
What must the Record class implement to avoid memory leaks when an object goes out of scope?
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Which of the following is a necessary step in dynamically allocating memory in the Record class?
Which of the following is a necessary step in dynamically allocating memory in the Record class?
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What is one key difference between static arrays and dynamic arrays?
What is one key difference between static arrays and dynamic arrays?
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Which method allows a vector to reserve memory without changing its size?
Which method allows a vector to reserve memory without changing its size?
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How are elements in a vector accessed?
How are elements in a vector accessed?
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Vectors and static arrays share which of the following characteristics?
Vectors and static arrays share which of the following characteristics?
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Which statement best describes the memory management of static arrays?
Which statement best describes the memory management of static arrays?
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What happens if a vector exceeds its capacity?
What happens if a vector exceeds its capacity?
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What defines a vector as a linear sequence container?
What defines a vector as a linear sequence container?
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What is the primary function of a destructor in a class that uses dynamic memory?
What is the primary function of a destructor in a class that uses dynamic memory?
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How does the internal structure of a vector store its elements?
How does the internal structure of a vector store its elements?
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What happens to a vector's memory when it is not full or empty?
What happens to a vector's memory when it is not full or empty?
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Why is reallocating memory considered an expensive task for vectors?
Why is reallocating memory considered an expensive task for vectors?
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What is the limitation regarding the use of std::vector in CSC 1061?
What is the limitation regarding the use of std::vector in CSC 1061?
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What is the purpose of the Record::split member function?
What is the purpose of the Record::split member function?
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What generally happens to the extra storage allocated for a vector?
What generally happens to the extra storage allocated for a vector?
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What does the algorithm performed in the destructor check for before deleting memory?
What does the algorithm performed in the destructor check for before deleting memory?
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How does a vector generally manage memory when adding elements?
How does a vector generally manage memory when adding elements?
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When does the maximum size of a vector equal its used size?
When does the maximum size of a vector equal its used size?
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Study Notes
CSC 1061 Vectors
- Vectors are container classes that store elements in a dynamic array.
- The array's capacity adjusts automatically as needed.
- This is managed by the class's member functions.
- Vectors are linear sequence containers similar to arrays.
- Vectors store elements contiguously.
- Vector elements access using offsets.
Pre-Challenge Vectors
- Complete the Vectors tutorial.
- Required: Drag-and-drop activity.
- Required: Activities using vectors in C++.
- Optional: Using the
reservefunction with a vector. - Optional: Activity on vectors out of bounds.
- Required: Multiple-choice activities.
Vector Data Structure
- Vectors are linear sequence containers.
- Vectors provide dynamic sizing, unlike arrays which have fixed sizes.
- Elements are stored contiguously, analogous to arrays.
- Vector elements accessible via offsets, like in arrays.
- Vectors are as efficient as arrays in terms of speed for accessing elements.
Static vs. Dynamic Arrays
-
Static Arrays:
- Stored in stack memory.
- Fixed size, determined at compile time.
- Size cannot change after creation.
- Memory management handled by compiler.
- Memory allocated from stack memory for static arrays.
- Allocation of memory is handled during compiler management.
-
Dynamic Arrays:
- Stored in heap memory.
- Size can change dynamically.
- Efficient for applications needing flexible sizes.
- Memory allocation handled by programmer.
Vector Memory Management
- Vectors use dynamic arrays allocated in heap memory.
- Growing vectors require reallocation to a larger array for increasing size.
- Reallocation takes time. Vectors allocate excess memory to avoid frequent reallocations.
- Vector memory size only increases and will not decrease. Maximum size of vector equals the number of used elements in the vector.
- Dynamically allocated memory, elements must be deleted by clearing vector.
Destructor (Vectors)
- When objects go out of scope, previously allocated memory must be deleted.
- Destructor is responsible for deleting memory, so it must use
delete[]for arrays in the destructor. - Resetting the pointer to null after deallocation prevents accidental reuse.
Record::Split (String)
- The
Record::splitfunction in CSC 1061 handles splitting strings based on delimiters. - It uses a
std::vectorinternally to store the separated parts of the string. - The split function grows the vector one element at a time.
- The function copies part of the
std::stringinto the vector. - The vector size must be manually coded.
- Function works similarly to Python's string split method.
Class Record
- The
Recordclass encapsulates a string and dynamically allocated (internal) vector. -
split()method is for separating the string. -
Recordwill create an internal vector to perform the functions of splitting the string. -
Recordincludes a destructor to ensure memory cleanup with dynamically allocated data.
Growing Dynamic Memory
- Memory is dynamically allocated one block at a time in the
splitmethod. - Inside the
splitfunction, memory allocation occurs dynamically.
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Description
This quiz covers the fundamental concepts of vectors in C++, including their properties, differences from static arrays, and operations. It includes key activities and challenges to enhance your understanding of vector data structures and their dynamic capabilities. Test your knowledge and improve your coding skills with dynamic arrays!
