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How am I suppose to find sum of std::vector of integers?

+1 vote
How am I suppose to find sum of std::vector of integers?
posted Aug 4, 2016 by Shahsikant Dwivedi

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1 Answer

+3 votes
Best answer

Iterate till end and take the sum

for(std::vector<int>::iterator it = vector.begin(); it != vector.end(); ++it)
    sum += *it;

Or you can use std::accumulate(vector.begin(), vector.end(), 0); if needs a library function.

answer Aug 4, 2016 by Salil Agrawal
Thanks, sir but I am wondering whether there is any standard way to find the sum, as we sort the vector elements by using sort()  function.
You may have missed the second part there is something called accumulate but part of library numeric.
My apologies for missing the second part , but I have one more question about the third argument, is it the initial value that accumulate will return and what if it is 0.0?
I think its the init value so if you set the init value to be 5 then sum will be sum +5.
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