Question

how can I use for each loop in GCC?

and how can i get GCC version? (in code)

Answer 1

Use a lambda, e.g.

// C++0x only.
std::for_each(theContainer.begin(), theContainer.end(), [](someType x) {
    // do stuff with x.
});

The range-based for loop is supported by GCC since 4.6.

// C++0x only
for (auto x : theContainer) {
   // do stuff with x.
}

The “for each” loop syntax is an MSVC extension. It is not available in other compilers.

// MSVC only
for each (auto x in theContainer) {
  // do stuff with x.
}

But you could just use Boost.Foreach. It is portable and available without C++0x too.

// Requires Boost
BOOST_FOREACH(someType x, theContainer) {
  // do stuff with x.
}

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See How do I test the current version of GCC ? on how to get the GCC version.