c++ - How to use container neighbours in std algorithms in a right way -

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are std algorithms designed use several neighbor elements in container?

here have done read samples file(each sample has it's own offset)

long offsets[] = { 0x00000000, 0x00000010, 0x00000020, .... }  ifstream file(path, ios::binary); vector<sample> samples; for_each(begin(offsets), end(offsets), [](long &offset){     auto samplesize = *(&offset+1)-offset;     sample s;     file.read( s.getbuffer(), samplesize);     samples.push_back(s); });

to figure out size need 2 adjacent elements vector. think use std::advance() or std::next() instead of *(&offset+1). right approach @ here use standard algorithm? if yes, algorithms designed used in way?

with boost zip iterator, may like:

// assume offsets not empty. std::for_each(     boost::make_zip_iterator(boost::make_tuple(begin(offsets), begin(offsets + 1))),     boost::make_zip_iterator(boost::make_tuple(end(offsets) - 1, end(offsets))),     [&](const boost::tuple<const long&, const long&>& t) {         auto samplesize = t.get<1>() - t.get<0>();         sample s;         file.read(s.getbuffer(), samplesize);         samples.push_back(s);     } );

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