Find substring between two indices in C++

You can do this:

std::string(&s[start], &s[end+1])

or this:

std::string(s.c_str() + start, s.c_str() + end + 1)

or this:

std::string(s.begin() + start, s.begin() + end + 1)

These approaches require that end is less than s.size(), whereas substr() does not require that.

Don't complain about the +1--ranges in C++ are always specified as inclusive begin and exclusive end.

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