Using the new lambda function of C++ 11

Lambda functions are the new addition to the C++ family. They can be described as anonymous functions.

Getting ready

To work through this recipe, you will need a machine running Windows and Visual Studio.

How to do it…

To understand a lambda function let's have a look at the following code:

#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;

int main()
{
  vector<int> numbers{ 4,8,9,9,77,8,11,2,7 };
  int b = 10;
  for_each(numbers.begin(), numbers.end(), [=](int y) mutable->void { if(y>b) cout<<  y<<endl;  });

  int a;
  cin >> a;

}

How it works…

Lambda functions are a new addition to the C++11 family. They are anonymous functions and can be very handy. They are generally passed as arguments to a function. The syntax of a lambda function is as follows:

• [ capture-list ] ( params ) mutable(optional) exception attribute -> ret { body }

The mutable keyword is...