A simple question about scope

Hi, this is my first post.

It concerns the scope of a loop control counter object declared inside the for statement...

Here is an example:

Code:

---

{
  statement;
  ...
  statement;
  // let's call this "SCOPE 1"
  // now...
  for (int i=1; 1<=10; i++)
  {
      statement;
      ...
      statement;
      // let's call this "SCOPE 2"
  }
  statement;
  ...
  // now we're back to "SCOPE 1"
}

---

Could someone (well, ideally many people) tell me whether the scope of i (as declared inside the for statement) is SCOPE 1 or SCOPE 2 ?

Much obliged,
Doug.

Why don't you just try it?

Welcome to the forums!

In C89 variables must be declared at the start of a block. That is, after a { and before other statements. In C99 and C++ compilers, one of which you must be using, you can declare variables elsewhere. You should be aware that not all compilers imlement C99 yet. A variable declared in the initializer of a for loop will have scope only in the for block. That is "Scope 2" in your example. It will not be visible in "Scope 1". You can easily test scope by trying to use a variable in the different scopes. Your compiler will trigger an error if the variable is not visible.

Please consider reading this post.

Right ho.
I put in the code tags and I am away to start an X-session and learn by experimentation
D.