sum of vector c++ code example
Example 1: sum of vector c++
accumulate(a.begin(), a.end(), 0);
Example 2: sum of elements in c++ stl
accumulate(a.begin(), a.end(), 0)
Example 3: sum elements in vector c++
for (auto& n : vector)
sum_of_elems += n;
Example 4: sum of vector c++
accumulate(first, last, sum);
accumulate(first, last, sum, myfun);
first, last : first and last elements of range
whose elements are to be added
sum : initial value of the sum
myfun : a function for performing any
specific task. For example, we can
find product of elements between
first and last.
int a[] = {5 , 10 , 15} ;
int res = accumulate(a,a+3,0);
Example 5: C++ sum a vector of digits
int digit_sum(vector<int> num) {
int sum = 0;
for (auto x : num) sum += x;
return sum;
}