C++ using a block of code multiple times in the main code

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If you don’t want to use functions, use lamdas starting with C++11.

Lambdas are basically anonymous functions, which I think is what you want, you seem to not want to define be a separate function:

auto something = [&x]() {
    std::cout << "Something had been done\n";
    ++x;
};

Then, you can call it:

something();

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