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C++ Pointers and References

1. Pointers Fundamentals

Introduction to Pointer Assigning Addresses to Pointers Link Between Pointer and Variable Pointers Use Cases

2. Pointer Arithmetic

Introduction to Pointer Arithmetic Pointer Arithmetic Practice Arrays and Pointers Connection Array Pointer Arithmetic Practice

3. References Fundamentals

Introduction to References Reference Use Cases Rvalue and Lvalue References Reference vs Pointers

4. Dynamic Memory Allocation

Introduction to Memory Dynamic Allocation Dynamic Allocation of the Array Pointer to Pointer Dynamic Allocation Summary and Overview

Dynamic Allocation

Dynamic memory allocation involves using operators new and delete. These operators allow you to allocate memory for variables and arrays at runtime, providing greater flexibility than static memory allocation.

new: operator that is used to dynamically allocate memory for an object or an array of objects during runtime;
delete: operator that is used to deallocate memory that was previously allocated with the new operator.

Note

A pointer pointing to dynamically allocated memory is typically stored on the stack, but the memory it points to is allocated on the heap.

To create an integer variable dynamically you have to use a pointer along with the new keyword.

To free the dynamically allocated memory, you use the delete operator:

Make it a rule for yourself: when you use new to allocate memory, always use delete to free it up later.

Note

Failure to delete dynamically allocated memory can result in memory leaks, where the program retains memory that is no longer in use.

Dynamic Allocated Arrays

When allocating memory for arrays dynamically, use the new[ ] operator and when releasing memory for dynamically allocated arrays, use delete[ ].

Завдання

Swipe to show code editor

Dynamically allocate a float variable and an array of integer type.
Output addresses of the allocated variable and array.
Free allocated memory.

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Dynamic Allocation

new: operator that is used to dynamically allocate memory for an object or an array of objects during runtime;
delete: operator that is used to deallocate memory that was previously allocated with the new operator.

Note

A pointer pointing to dynamically allocated memory is typically stored on the stack, but the memory it points to is allocated on the heap.

To create an integer variable dynamically you have to use a pointer along with the new keyword.

To free the dynamically allocated memory, you use the delete operator:

Make it a rule for yourself: when you use new to allocate memory, always use delete to free it up later.

Note

Failure to delete dynamically allocated memory can result in memory leaks, where the program retains memory that is no longer in use.

Dynamic Allocated Arrays

When allocating memory for arrays dynamically, use the new[ ] operator and when releasing memory for dynamically allocated arrays, use delete[ ].

Завдання

Swipe to show code editor

Dynamically allocate a float variable and an array of integer type.
Output addresses of the allocated variable and array.
Free allocated memory.

Все було зрозуміло?

Дякуємо за ваш відгук!

Секція 4. Розділ 2

Dynamic Allocation

new: operator that is used to dynamically allocate memory for an object or an array of objects during runtime;
delete: operator that is used to deallocate memory that was previously allocated with the new operator.

Note

A pointer pointing to dynamically allocated memory is typically stored on the stack, but the memory it points to is allocated on the heap.

To create an integer variable dynamically you have to use a pointer along with the new keyword.

To free the dynamically allocated memory, you use the delete operator:

Make it a rule for yourself: when you use new to allocate memory, always use delete to free it up later.

Note

Failure to delete dynamically allocated memory can result in memory leaks, where the program retains memory that is no longer in use.

Dynamic Allocated Arrays

When allocating memory for arrays dynamically, use the new[ ] operator and when releasing memory for dynamically allocated arrays, use delete[ ].

Завдання

Swipe to show code editor

Dynamically allocate a float variable and an array of integer type.
Output addresses of the allocated variable and array.
Free allocated memory.

Все було зрозуміло?

Дякуємо за ваш відгук!

new: operator that is used to dynamically allocate memory for an object or an array of objects during runtime;
delete: operator that is used to deallocate memory that was previously allocated with the new operator.

Note

A pointer pointing to dynamically allocated memory is typically stored on the stack, but the memory it points to is allocated on the heap.

To create an integer variable dynamically you have to use a pointer along with the new keyword.

To free the dynamically allocated memory, you use the delete operator:

Make it a rule for yourself: when you use new to allocate memory, always use delete to free it up later.

Note

Failure to delete dynamically allocated memory can result in memory leaks, where the program retains memory that is no longer in use.

Dynamic Allocated Arrays

When allocating memory for arrays dynamically, use the new[ ] operator and when releasing memory for dynamically allocated arrays, use delete[ ].

Завдання

Swipe to show code editor

Dynamically allocate a float variable and an array of integer type.
Output addresses of the allocated variable and array.
Free allocated memory.

Секція 4. Розділ 2