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How do you calculate the size of a class in memory in C plus plus?
Wiki User
∙ 12y ago
Use sizeof(
Wiki User
∙ 12y ago
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Is there any difference in allocation of the memory of the member of class and object?
A class is the definition of a type -- it consumes no memory in an off itself. An object is an instance of a class, and therefore consumes memory, equal to the total size of all its member variables (attributes), including base class members, plus padding for alignment. If the class declares any virtual methods, a v-table is also created, which consumes additional memory.
How do you find size of any object in java OR is there any operator or fun.. equivalent size of in c plus plus?
No, there is no such operator or function in Java that can tell you the amount of memory an object uses.
How object take place in memory in case of oops?
Objects are stored in memory according to their members. They are very similar to struct types, insofar as the total memory assigned to an object is equal to the total size of all its members, plus any padding required for member alignment. If the object contains pointers, the memory allocated to those pointers will reside elsewhere, outside of the object, regardless of whether that memory belongs to the object or not (it is not included in the object's memory footprint). Additional memory is also set aside for the v-table if the class contains any virtual methods.
How do you find the size of a class object?
Java does not have a sizeOf() operator and hence there is no way we can actually determine the size of a java class object. However we can analyze the overall heap space utilization to try to get an approximate indication of how much memory is used by an object but it is not accurate.
How many objects of a given class can there be in a program?
It depends on the size of the object and the amount of (virtual) memory available. However, the size of an object is not determined by the amount of memory it physically occupies, but by the amount of memory it consumes. For example, a resource handle object occupies at least one word of memory, but the resource it refers to consumes additional memory. The sizeof operator only returns the size of memory occupied by the object itself, not the total memory consumed by the object.
Is there any difference in allocation of the memory of the member of class and object?
A class is the definition of a type -- it consumes no memory in an off itself. An object is an instance of a class, and therefore consumes memory, equal to the total size of all its member variables (attributes), including base class members, plus padding for alignment. If the class declares any virtual methods, a v-table is also created, which consumes additional memory.
What is the size of a blank class in C plus plus?
Try 'sizeof', it will return the size in bytes.
What is the maximum size of else-if ladder in c plus plus?
There is no preset limit on the size of an else-if ladder in C++. It depends on compiler design and available memory.
Why the size of class in oops is 1 byte without datamember?
The size of an empty class is not normally 1 byte, actually. It will usually be equal to the word size defined by the platform it is running on (often 2 or 4 bytes). This is because the word size is usually used as a memory address size and an empty class still needs to point to some location in memory (even if that location stores no data).
What is the size of a class object in c?
There are no classes let alone objects in C. It is not an object oriented language thus all data types are primitive types. C++ is object oriented. The size of an object is equal to the sum of the non-static class member attributes, including any padding bytes required for memory alignment purposes. The size of a class is equal to the sum of the static class member attributes, plus any padding bytes required for memory alignment purpose. To minimise the need for padding bytes within the class and within objects of the class, it is best to declare all class member attributes by order of size, largest first. However, static member attributes can be declared separately from non-static member attributes since the two are allocated separately in memory.
What is memory allocation of class?
Classes are a declaration of a type and therefore do not allocate any memory apart from static members which exist throughout the life of the program (whether objects are instantiated from the class or not). Static member variables are allocated upon the stack, within the program's data segment, and should be listed in descending order of length to make best use of available memory (minimising padding resulting from alignment). When an object is instantiated from a class, memory is allocated according to the sum total of all non-static member variable lengths, plus padding for alignment purposes. As with static member variables, non-static member variables should be listed in descending order of length to make the best use of available memory. Classes that declare virtual methods (including pure-virtual methods) also set aside memory for the virtual table, the size of which is dependant upon the number of virtual methods. Classes that allocate memory during construction or by assignment or class setters will require additional memory, however this memory is not included in the size of the class itself (only the member pointer lengths are included in the class size).
How do you find size of any object in java OR is there any operator or fun.. equivalent size of in c plus plus?
No, there is no such operator or function in Java that can tell you the amount of memory an object uses.
How do you calculate vertual memory?
Virtual memory is not calculated, although the operating system can manage its size based on how much memory you have. This can lead to fragmentation issues and slack space being created on the hard drive. A good virtual swap file size is generally your memory size multiplied by 1.5. Say you have 4G memory, the swap should be a fixed size (not allowing Windows to manage it) of around 6G. This will give it ample room to swap out information and stop it from fragmenting drive space.
What is size range of secondary memory?
size range of secondary memory
How object take place in memory in case of oops?
Objects are stored in memory according to their members. They are very similar to struct types, insofar as the total memory assigned to an object is equal to the total size of all its members, plus any padding required for member alignment. If the object contains pointers, the memory allocated to those pointers will reside elsewhere, outside of the object, regardless of whether that memory belongs to the object or not (it is not included in the object's memory footprint). Additional memory is also set aside for the v-table if the class contains any virtual methods.
How do I replace character in Sonic Heroes?
Download the memory editor! plus you can change the size too! by the way you can go to any STAGE!
Has the size of CMOS memory increased or decreased?
CMOS memory size has increased.
