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c++ count number of element in vector

purple_spider513 answered on October 2, 2021 Popularity 10/10 Helpfulness 4/10

answer c++ count number of element in vector

related c++ count vector elements

c++ count number of element in vector

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count(vect.begin(), vect.end(), 3)

Popularity 10/10 Helpfulness 4/10 Language cpp

Source: www.geeksforgeeks.org

Tags: c++ count element vector

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Contributed on Mar 12 2022

purple_spider513

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c++ count vector elements

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// 1.
for(std::vector<int>::iterator it = vector.begin(); it != vector.end(); ++it)
    sum_of_elems += *it;

// 2.
// #include <numeric>
sum_of_elems = std::accumulate(vector.begin(), vector.end(), 0);

// C++11 and higher
// 3.
// #include <numeric>
sum_of_elems = std::accumulate(vector.begin(), vector.end(),
                               decltype(vector)::value_type(0));

// 4.
for (auto& n : vector)
    sum_of_elems += n;

Popularity 10/10 Helpfulness 3/10 Language cpp

Source: stackoverflow.com

Tags: c++

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