How to pass unsigned char array to a function in C++?

Question

void GetKey(int date, unsigned char[] key)
{

}

I am trying to pass unsigned char array t a function but I get an error "expected a ')'" where "key" variable is.

Fred Larson · Accepted Answer · 2013-06-23 03:19:27Z

6

Just move the brackets:

void GetKey(int date, unsigned char key[])

But note that it'll essentially degenerate into a pointer.

answered Jun 23, 2013 at 3:19

Fred Larson

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billz · Accepted Answer · 2013-06-23 03:20:40Z

2

Use template function:

template<size_t N>
void GetKey(int date, unsigned char(&key)[N])
{
}

answered Jun 23, 2013 at 3:20

billz

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1 Comment

Mortimer McMire Over a year ago

What actually happens when you write a template like that, using size_t instead of class or typename? And then, what would unsigned char(&key)[N] actually be? Sorry if these are stupid questions. I'm trying to rebuild my C++ knowledge ground-up.

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