Errors trying to declare array in class definition

Question

I've been trying to get this class to have a private array data member for the past hour, but it's refusing to work. I don't want to use array[5] mapArray; because then I don't get the array member functions.

Here is the code I am using at the moment.

#include "stdafx.h"
#include <iostream>
#include <array>
#include <fstream>

class Map {
public:
    void scanFile();
private:
    size_t columns = 20;
    size_t rows = 20;
    array <int, 5> mapArray;
};



int main() {
    Map myMap;
}

And here are some example errors I am getting in Visual Studio.

1>x:\aerofs\gt\ece 2036\lab03\map.cpp(12): error C2143: syntax error : missing ';' before '<'
1>x:\aerofs\gt\ece 2036\lab03\map.cpp(12): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>x:\aerofs\gt\ece 2036\lab03\map.cpp(12): error C2238: unexpected token(s) preceding ';'

The array class is defined in the std namespace, so try std::array. — Some programmer dude
– Some programmer dude, Commented Feb 21, 2015 at 19:20
Thanks, I didn't realize the name actually came from the std space. — Keegs
– Keegs, Commented Feb 21, 2015 at 19:23

4pie0 · Accepted Answer · 2015-02-22 18:32:30Z

1

You got compilation error. It is because array is defined in namespace std. Either add

using namespace std;

at the top of your file or add std:: before you use any type defined in there:

std::array< int, 5> mapArray;

The latter is preferred because you don't have to bring all symbols from the standard library just to use it's array type.

edited Feb 22, 2015 at 18:32

answered Feb 21, 2015 at 19:24

4pie0

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Mr.C64 · Accepted Answer · 2015-02-21 19:44:55Z

1

Standard STL classes, including std::array, are part of the std:: namespace.

So, you can simply add the std:: namespace qualifier to your array data member:

std::array<int, 5> mapArray;

answered Feb 21, 2015 at 19:44

Mr.C64

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