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Questions - sizeof

Getting length of a float array in C++

Im trying to find out the length of a given X array in my c++ program and I can't figure out how to see how many elements are in there. float *X = (float *) rgrid->GetXcoordinates->GetVoidPointe...
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PatTheTrickster

c++

arrays

graphics

vtk

sizeof

Votes: 0

Answers: 1

Latest Answer

Here you are: auto sz_x = sizeof(x) / sizeof(*x); the number of elements in the array = the size of the entire array in bytes / the size of an element from the array in bytes
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user17970898

What would be the correct way to "recreate" sizeof operator with user defined sizes during compile time for structs/classes

Morning, what would be a correct way to sort of "recreate" the sizeof operator for struct and classes and supply it with my own sizes. My initial idea was to create a helper class that looks...
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Artur K.

c++

sizeof

Votes: 0

Answers: 2

Latest Answer

Each use of ReadMemory(0,0) for a T the constexpr auto size = T::size; would be calculated during compile time? It could be. Use constexpr instead of inline const. And the code so far optimized tha...
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KamilCuk

c programming, How can i get the sizeof a variable through a function using a pointer as a parameter?

How can i get the sizeof a variable through a function using a pointer as a parameter? readEachChar(unsigned char * input){ printf("The the size of the string %zu", sizeof(input)); ...
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user14570759

c

pointers

byte

sizeof

memory-address

Votes: 0

Answers: 4

Latest Answer

You can't just ask for sizeof(pointer) since you'll get the size of the pointer itself. Instead of that- you can change the function to get the size as parameter: readEachChar(unsigned char * input, u...
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Annie

Length of class object

I have an array AAA *aaa[len], where AAA is a class. class AAA {...}; int main() { cin >> len; AAA *aaa[len]; // how to get the length of aaa? } How to get the length of aaa? I tried siz...
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livefun

c++

class

sizeof

Votes: 0

Answers: 0

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