Size of empty structure

[kittu]

Hi All,

I have a doubt related Size of empty structure. I know the answer of empty structure is "0".

Could Any one please let me know the reason, How and why the Result got ZERO..??

[donbock]

Please show us what this empty structure looks like.

[Banfa]

Are you talking C or C++ because the size of an empty structure in C++ is 1 and while the size of an empty structure in C is 0 there is no point in having one as it serves no purpose; it produces a warning from my compiler.

[weaknessforcats]

In C++ you are always allowed to create a variable using the struct. That variable must exist in memory. The smallest allocation is typically one byte. Hence sizeof the struct is 1.

As far as C goes, you are required to have at least one member in a struct. If not, you get a compile error. Therefore, in C a struct does not have a size 0 because that code won't even compile.