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

0 vote277 views1 answer
Program to swap max and min in matrix
C++
0 vote259 views10 answers
Convert python to c++ online
C++
0 vote236 views9 answers
Convert c++ to python online
C++
0 vote286 views1 answer
How to check size of file in c++
C++
41 votes324 views6 answers
Print hello world c++
C++
0 vote267 views1 answer
Compile c++ MPI Program
C++
0 vote253 views1 answer
What is g++ and gcc
C++
0 vote256 views1 answer
How to show c++ binary files in sublime text
C++
0 vote255 views3 answers
C to c++ online converter
C++
1 vote264 views4 answers
C++ for loop syntax
C++