lambda.cc (cpp-lecture/lambda-simple/lambda.cc)

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#include <iostream>

int
main()
{
    int i = 5;

    auto f = [=]()
    {
        std::cout << "i = " << i << std::endl;
    };

    auto g = [&]()
    {
        std::cout << "i = " << i << std::endl;
    };

    i = 6;

    f();
    g();
}