You want to use the accumulate function of the <numeric> header in C++ to return the result of accumulating all the values in the range [first,last) to init.
Which of these code snippets is equivalent to the behaviour of the accumulate function?
Options
1.template <class InputIterator, class T>
T accumulate (InputIterator first, InputIterator last, T init)
{
while (first!=last) {
init = init + *first; ++first;
}
return init;
}
2.template <class InputIterator, class T>
T accumulate (InputIterator first, InputIterator last, T init)
{
while (first!=last) {
init=binary_op(init,*first)
++first;
}
return init;
}
3.Both 1 or 2
4.None of these
