Copying one Array into another using std::copy

Question

I am copying a smaller array into a larger in this way

int *Arr // this points to array that has size of 7 (i.e) int Arr[7];
int size // this has the size of the above ie. 7

Now I want to make a larger array and copy the previous array data so I do this

int *nArr = new int[size+1];

This is where the problem starts I am trying to copy content using std::copy I am using C++03 so I dont have access to std::begin and std::end

std::copy ( Arr, Arr+size, nArr);

The above statement gives me the error

Error   1   error C4996: 'std::_Copy_impl': Function call with parameters that may be unsafe - this call relies on the caller to check that the passed values are correct. To disable this warning, use -D_SCL_SECURE_NO_WARNINGS. See documentation on how to use Visual C++ 'Checked Iterators'   c:\program files (x86)\microsoft visual studio 11.0\vc\include\xutility 2176

@tmp: Please state the difference between Arr and &Arr[0], in this case. — Lightness Races in Orbit
– Lightness Races in Orbit, Commented Mar 22, 2014 at 18:52

Lightness Races in Orbit · Accepted Answer · 2014-03-22 18:53:05Z

1

Looks like Microsoft being picky. Just disable the warning; your code is fine.

answered Mar 22, 2014 at 18:53

Lightness Races in Orbit

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Mantosh Kumar · Accepted Answer · 2014-03-22 18:53:53Z

0

Add the preprocessor -D_SCL_SECURE_NO_WARNINGS in your VS project and the above code would compile.

answered Mar 22, 2014 at 18:53

Mantosh Kumar

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6 Comments

Rajeshwar Over a year ago

I added D_SCL_SECURE_NO_WARNINGS to the preprocessor definitions but I am still getting the same error

Mantosh Kumar Over a year ago

Ideally after adding the MACRO and saving the .sln file and recompiling again should solve your problem.

Lightness Races in Orbit Over a year ago

@Rajeshwar: You forgot a - and a _, and randomly added a space. For no reason. Don't do that.

Rajeshwar Over a year ago

Looks like my statement std::copy(Arr, Arr+size, nArr); was fine. I just needed to disable the warning

Lightness Races in Orbit Over a year ago

@Rajeshwar: Yes, I said that 43 minutes ago :)

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