How to initialize all elements in an array to the same number in C++

Question

I\'m trying to initialize an int array with everything set at -1.

I tried the following, but it doesn\'t work. It only sets the first value at -1.

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Answer 1

I'm surprised at all the answers suggesting vector. They aren't even the same thing!

Use std::fill, from :

int directory[100];
std::fill(directory, directory + 100, -1);

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Not concerned with the question directly, but you might want a nice helper function when it comes to arrays:

template 
T* end(T (&pX)[N])
{
    return pX + N;
}

Giving:

int directory[100];
std::fill(directory, end(directory), -1);

So you don't need to list the size twice.