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It depends, especially if you are going to use C++.
If you allocated the variable using the malloc call or any of its derivatives you must use the corresponding 'free' subroutine call to delete them.
If you use the more modern C++ 'new' operator, then use the 'delete' operator to remove the memory dynamically in the program.
What else can I help you with?
Difference between dynamic and static memory allocation?
Static memory allocation is memory allocated on the "stack" and cannot be resized after the initial allocation, while dynamic memory allocation is memory allocated in the "heap", and can be dynamically expanded and shrunk as necessary.
Where is pointer located?
A pointer is a variable that stores the memory address of another variable. In programming, pointers are typically located in the stack if they are local variables within a function, or in the heap if they are dynamically allocated. The actual data that the pointer points to can reside in either memory area, depending on how it was allocated.
What is the difference between stack and heap memory in C?
stack is memory allocated for temporary variables used by subroutinesheap is memory allocated for long term data structures (e.g. linked lists, trees) that are likely to change sizeBoth are forms of dynamically allocated memory (i.e. allocated/deallocated at runtime as needed), but the allocation/deallocation method and their place in physical/virtual memory are differentStatically allocated memory (i.e. allocated at compile/link time) is used for variables and data structures that must exist as long as the program is running and cannot change in size while the program is running.
When you compile source code where the variables stored?
When you compile source code, the variables are stored in memory during program execution. The compiler translates the source code into machine code, which allocates memory for variables in different segments, such as the stack (for local variables) and the heap (for dynamically allocated memory). The specific location and management of these variables depend on the programming language, the compiler, and the architecture of the system. Additionally, constants and global variables may be stored in separate memory regions.
Is declaration of variables allocated memory?
Constants, static variables and global variables are allocated in the program's data segment at compile time. Local variables are allocated on the stack at runtime. Variables cannot be allocated on the heap, you must use a constant, static variable, global variable or local variable to store the start address of a dynamic memory allocation. The variable must be a raw pointer or a reference handle (a smart pointer).
Write an Algorithm to delete a last element from the array?
// Assuming you dynamically allocated this array using "new"... delete array[arraysize - 1]; arraysize--;
What is the code to delete variables that are dynamically allocated?
In C++, dynamically allocated variables are best encapsulated in a class. In this way, the variable is automatically deleted when the object falls from scope. #include<iostream> class f () { int* p; public: f (const int i=0): p {new int{i}} {} f (const& f other): p {new int{*other.p;}} {} ~f() {delete p; } f& operator=(const f& other) { *p = *other.p; } f& operator= (const int i) {*p=i;} operator int () { return *p; } }; int main() { { f value = 42; // use value... } // f automatically falls from scope here, releasing the memory allocated to value.p }
What is smart pointer?
Smart pointers are C++ regular pointers except that they automatically delete the object pointed to at the appropriate time.Thus ensuring proper destruction of dynamically allocated objects.
Can you delete array?
If the array was allocated with new, then delete it with delete []. Otherwise, if it was allocated with malloc() then delete it with free. Otherwise, you cannot delete it because it was pre-allocated at link-load time by the compiler.
Difference between dynamic and static memory allocation?
Static memory allocation is memory allocated on the "stack" and cannot be resized after the initial allocation, while dynamic memory allocation is memory allocated in the "heap", and can be dynamically expanded and shrunk as necessary.
Where is pointer located?
A pointer is a variable that stores the memory address of another variable. In programming, pointers are typically located in the stack if they are local variables within a function, or in the heap if they are dynamically allocated. The actual data that the pointer points to can reside in either memory area, depending on how it was allocated.
What is the difference between stack and heap memory in C?
stack is memory allocated for temporary variables used by subroutinesheap is memory allocated for long term data structures (e.g. linked lists, trees) that are likely to change sizeBoth are forms of dynamically allocated memory (i.e. allocated/deallocated at runtime as needed), but the allocation/deallocation method and their place in physical/virtual memory are differentStatically allocated memory (i.e. allocated at compile/link time) is used for variables and data structures that must exist as long as the program is running and cannot change in size while the program is running.
When you compile source code where the variables stored?
When you compile source code, the variables are stored in memory during program execution. The compiler translates the source code into machine code, which allocates memory for variables in different segments, such as the stack (for local variables) and the heap (for dynamically allocated memory). The specific location and management of these variables depend on the programming language, the compiler, and the architecture of the system. Additionally, constants and global variables may be stored in separate memory regions.
Is declaration of variables allocated memory?
Constants, static variables and global variables are allocated in the program's data segment at compile time. Local variables are allocated on the stack at runtime. Variables cannot be allocated on the heap, you must use a constant, static variable, global variable or local variable to store the start address of a dynamic memory allocation. The variable must be a raw pointer or a reference handle (a smart pointer).
What do you mean by run time memory allocation?
When the allocation of memory to the program is done on need, during the execution of a program, it is called as the dynamic memory allocation. Memory is allocated from a free memory pool called as heap.The only way to access this dynamically allocated memory is through pointers. Dynamically allocated memory can be freed at run time and again added to heap.
Where dynamic variables are stored?
Dynamic variables are stored in a memory heap allocated to them at run time.
How much time does it take to delete an array value?
C compiler delete only those memory which is dynamically created. So we can't delete the value of array.
