Pointers to arrays

Hey, im working with c++ for some time. And i wonder how to send there pointer and use in function.

In delphi i could do something like this :

Code:

---

procedure func(var a:Integer);
begin
  inc(a,10);
end;

...

a := 10;
func(a);
// and here i got a = 20

---

In c++ i noticed it works and u don't need to type 'var' (btw i can be dangerous, when i forget to not manipulate on varaible). But it's not work for me when i want do it by function which i have declared in class saved as header. That's why i need pointer to array.

I wonder how to access pointer in that function. Cause i tried like this :

Quote:

---

*somevariable[0] = 5;
*somevariable[0] = 2;

---

But it changed address of point i guess, beacuse when i checked this array it was like : 0x05000000(...)

It's hard to say, when your example is for an integer, yet you mention arrays (without context) for your C++.

One thing to bear in mind though, depending on what you're doing is that
*somevariable[0] = 5;
should be written as
(*somevariable)[0] = 5;

Quote:

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Originally Posted by kargo

In c++ i noticed it works and u don't need to type 'var' (btw i can be dangerous, when i forget to not manipulate on varaible). But it's not work for me when i want do it by function which i have declared in class saved as header. That's why i need pointer to array.

I wonder how to access pointer in that function.

---

I am a bit confused what you want to achieve. Post some pascal code. And no, in c++ it does not work, you still need to add something (the & operator).

Quote:

---

Originally Posted by kargo

Hey, im working with c++ for some time. And i wonder how to send there pointer and use in function.

In delphi i could do something like this :

Code:

---

procedure func(var a:Integer);
begin
  inc(a,10);
end;

a := 10;
func(a);
// and here i got a = 20

---

---

The equivalent in C or C++ would be:

Code:

---

void func(int *a)
  {
    *a += 10;
  }


int b =10;
func ( &b);

---

The trick is to work with pointers in the function but hand it the address of the variable.

(I was a Pascal programmer for a long time, until Borland killed it...)

A better example that works in C++ would be:

Code:

---

void func(int& a)
{
        a += 10;
}

int b = 10;
func(b);

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