[問題] 請教一個語法問題

[FAITHY ()]

看了一個lambda的範例code 看到一段的
不是很懂這是這是什麼語意(標示黃字部份...)

請問這語法是在表示什麼呢
感謝:)


Copy // even_lambda.cpp
// compile with: /EHsc
#include <algorithm>
#include <iostream>
#include <vector>
using namespace std;

int main()
{
   // Create a vector object that contains 10 elements.
   vector<int> v;
   for (int i = 0; i < 10; ++i)
   {
      v.push_back(i);
   }

   // Count the number of even numbers in the vector by
   // using the for_each function and a lambda expression.
   int evenCount = 0;
   for_each(v.begin(), v.end(), [&evenCount] (int n) {
      cout << n;

      if (n % 2 == 0)
      {
         cout << " is even " << endl;

         // Increment the counter.
         evenCount++;
      }
      else
      {
         cout << " is odd " << endl;
      }
   });

   // Print the count of even numbers to the console.
   cout << "There are " << evenCount
        << " even numbers in the vector." << endl;
}

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※ 編輯: FAITHY          來自: 219.87.71.10         (03/02 10:05)
推 scwg:code sample 下面的 comments 裡就有寫了啊...
→ scwg:The [&evenCount] part specifies the capture clause of
→ scwg:the expression