lambda7.cc (cpp-lecture/lambda-simple/lambda7.cc)

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#include <iostream>

int
main()
{
    int i = 5;

    auto g = [&](int j)
    {
        i = j;
    };

    std::cout << "i = " << i << std::endl;

    g(42);

    std::cout << "i = " << i << std::endl;
}