Declare a function that accepts std:array in a header file

Question

I am just playing around with std::array. Want to pass an array of integers to a function which can easily be done using

void arrayByValue(array<int, 5> arr);

The above can be invoked like

array<int, 5> aInt = {100,92,-1,122,112};  
arrayByValue(aInt);

This works perfectly fine as long as it is in same .cpp file. I am The issue is how to put this in a .h file, implement the method in .cpp file and then invoke it in another file assume main. I receive the error saying
'array': undeclared identifier
type 'int' expected

Please suggest what could be wrong. Please note this works perfect if I declare the function in the same file from where I am invoking it

score 1 · Answer 1 · answered Jun 07 '18 at 08:30

1

You need to add at the top of you .h file:

#include <array>

also use std::array - using namespace std; is a bad habit

answered Jun 07 '18 at 08:30

marcinj

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I identified the issue. Just curious why using namespace std; is bad? – Sameer Ahuja Jun 07 '18 at 08:38
@SameerAhuja see here https://stackoverflow.com/questions/1452721/why-is-using-namespace-std-considered-bad-practice – marcinj Jun 07 '18 at 08:42
Got it. Thank you. – Sameer Ahuja Jun 07 '18 at 08:57

score 1 · Answer 2 · answered Jun 07 '18 at 08:37

1

Apologies for the inconvenience. I forgot to use
using namespace std;
in the .h file. Using the above line or using std::array
resolved the issue

answered Jun 07 '18 at 08:37

Sameer Ahuja

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Declare a function that accepts std:array in a header file

2 Answers2