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

-1 vote105 views1 answer
Initialize variable in switch case c++
C++
1 vote139 views1 answer
C++ milliseconds
C++
4 votes145 views1 answer
Deep copy c++
C++
1 vote106 views1 answer
Quotation in c++ string
C++
0 vote152 views1 answer
C++ convert const char* to int
C++
4 votes109 views3 answers
C++ vector combine two vectors
C++
1 vote120 views1 answer
How to print fixed places after decimal point in c++
C++
0 vote133 views1 answer
How to remove maximum number of characters in c++ cin,ignore
C++
0 vote128 views1 answer
"++i + ++i" explanation
C++
2 votes124 views1 answer
Ph vid
C++