Given the following C struct: struct __attribute__((__packed__)) XIRControl { uint8_t command; char code[19]; uint16_t error; union codeData { struct rcvCommands { ...

Unlike C array, std::array is allowed to have zero length. But the current implementations differ in how std::array<T,0> is implemented, in particular the sizes of the object are different. This ...

When the array type is a "void *", then it can be allocated by: void **void_array; void_array = malloc(sizeof(void*) * 1); But, if the array type is a struct Hello *, then what should be ...

Say, is sizeof(void*) the same as the size processor can atomically access per instruction? For example, 32-bit processor can read aligned 4 bytes atomically, 64-bit processor can read aligned 8 bytes ...

This does not answer my need. I do not want to generate an error, I want to adapt the behavior of the software depending on the condition. Example: #if ( sizeof(unsigned long) == 4 ) # define a 5 #...

I did a static_assert to make sure that a valid type was used. I don't know if I just should have checked if the type is void, or whether any type can have size zero (I think it can with [[...

I want to create a function like SizeOf() of C++ for powershell, but apparently Microsoft uses some strange algorithm/formula to determine the mebibytes. Example: If you create file with exactly 1.856....

Consider this example where I add some extra \0 to a string. #include <stdio.h> #include <string.h> int main(int argc, char **argv){ char str1[] = "dog"; char str2[] = &...

I declared 2 arrays with the first one of size 6 and tried to concatenate the arrays using strcat(), then checked the number of elements in the array but the array size is still showing 6 and still it ...

I've got a question regarding the sizeof() operator. Browsing Open Source projects written in C obviously, some developers tend to use the sizeof() operator in one place and on other places the ...

There is one huge struct in our code, and its being passed around everywhere as a value. I would like to be able to know the size(amount of memory in bytes, go will allocate for a variable of this ...

I have an array of color codes, the size of which is known at compile time. I want to declare another array of the same size. But the code below throws an error. I can, of course, declare the size ...

Suppose we have the source: #include <stdint.h> #include <stdio.h> struct foo { char b ; char a [ SIZE_MAX ] ; } ; int main ( void ) { const size_t z = sizeof ( struct foo ) ; ...

Does the C++ standard have anything to say about the size equality of the following? struct AB { int a; int b; } Or struct A { int a }; struct B : public A { int b; } Is sizeof(...

So my professor gave us the assignment to code a function that works exactly like strcmp() but without using any library functions. I came up with the following code but instead of returning 1 or -1 ...