c++ cannot create object with identifier

Question

I already searched everywhere and I think this is really basic problem but I checked some other people code and they were using the same method to create an object with a unique ID that's why I'm not understanding why it doesnt work with me.

So here's the class Enemy:

class cEnemy{
public:
       //code that doesnt matter
};

So what i want to do is basically create 10 Enemies and each one will have a unique identifier(0...9), so what im doing is:

for (int i = 0; i < 10; i++){
       Enemy[i] = new cEnemy;
}

Right now it already gives me an error: error C2065: 'Enemy' : undeclared identifier

But if instead of writing Enemy[i] if i write Enemy[5] it works fine. I think im missing something.

Why? I saw this code exactly the same in other application and it works...

So my objective as I said it's to create 10 enemies with unique Id's and then to have access to each one but as you see i can't even create them.

Thanks in advance.

PS: The class and main are in the same cpp file

nhgrif · Accepted Answer · 2013-11-11 03:46:07Z

1

std::array<cEnemy, 10> Enemy;
for(int i = 0; i<10; ++i) {
    Enemy[i] = new cEnemy;
}

You have to create an array before you can use it. The error you're getting is the same as if you were try to do:

arrInt[i] = someInt;

Before having done:

int arrInt[someCount];

edited Nov 11, 2013 at 3:46

answered Nov 11, 2013 at 3:24

nhgrif

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3 Comments

Tristan Brindle Over a year ago

You're correct of course, but I'd advise using a std::array<cEnemy, 10> (or a vector) to avoid all the horrible pointer decay things that happen when passing C arrays to functions, which can be pretty confusing to newcomers.

user2966798 Over a year ago

@nhgrif Thanks a lot. So to be sure if i understood, with that code we created an array that has 10 objects of the type cEnemy, and with the for cycle, in each position of the array we make a new enemy? Let's say that the Enemy has X position and I want to access the position of the enemy saved in array with "id" 5: I just need to do this? Invasor[5]->getX(); Im a little confused

nhgrif Over a year ago

Well, in this example, the array is called Enemy. But if your cEnemy class has a method called getX(), and you want to call that on an element of the array, then I believe you've got the right syntax: Enemy[5]->getX(); I'm not perfectly familiar with C++, so no guarantees, but try it out.

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