CODEWITHSUNDEEP
c++arrays
TK_B
TK_B

Reputation: 23

C++ Define elements of array outside function

I am quite new to C++, so if there is a easier way to get what I want, feel free to tell me...

I've got a header containing constants I need to include everywhere in my code to use them in equations. Stuff like temperature and pressure.. Before I was using a single object with a constant mass.

real massObject          = 7.35619e-25;

Now I want to have more than one mass to be able to use more objects. So I tried to define Elements of an array I created.

const int numObjects     = 1;
double vmassObject[numObjects];
vmassObject[0]           = 7.35619e-25;

Then I found out that it was not possible to define every Element outside a function but I don't want to use a function because I would have to call it everytime. Also passing is no option. Is there a way to define the elements globally?

Thanks

Upvotes: 2

Views: 1366

Answers (1)

Some programmer dude
Some programmer dude

Reputation: 409166

You can initialize the array:

double vmassObject[numObjects] = {
    7.35619e-25
};

On a related note, you can't put this in a header file that you include in multiple source files. That's because then the array would be defined multiple times, and you can only have one definition in a program.

In the header you can declare the array:

extern double vmassObject[numObjects];

Then put the definition (with the initialization) in a single source file.

Upvotes: 2

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