C++ count vector elements

// 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;

Source: stackoverflow.com

Similar codes

2 votes159 views1 answer
Recursive binary search
C++
0 vote154 views1 answer
Srand() c++
C++
10 votes196 views3 answers
C++ check if file exits
C++
0 vote185 views1 answer
C++ get pointer from unique_ptr
C++
-1 vote157 views2 answers
Vector to char array c++
C++
0 vote163 views1 answer
16630147
C++
0 vote166 views6 answers
Template c++
C++
1 vote151 views1 answer
Accumulate c++
C++
0 vote154 views1 answer
Assegnare valori in c++
C++
6 votes163 views2 answers
Show stack c++
C++