The C++ Standard Library by Rainer Grimm

Author:Rainer Grimm
Language: eng
Format: epub, pdf
Publisher: leanpub.com
Published: 2016-10-24T16:00:00+00:00

The algorithms expect the value val or a generator gen as an argument. gen has to be a function taking no argument and returning the new value. The return value of the algorithms std::fill_n and std::generate_n is an output iterator, pointing to the last created element.

Fill and create ranges // fillAndCreate.cpp ... #include <algorithm> ... int getNext(){ static int next{0}; return ++next; } std::vector<int> vec(10); std::fill(vec.begin(), vec.end(), 2011); for (auto v: vec) std::cout << v << " "; // 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 std::generate_n(vec.begin(), 5, getNext); for (auto v: vec) std::cout << v << " "; // 1 2 3 4 5 2011 2011 2011 2011 2011

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