How do you find the sum of an array in c++?

Question

Let's say the array is for Cities with corresponding Outages.

How do I show the Sum of all of the outages.

Answer 1

By adding them up.

Answer 2

"Let's say the array is for Cities with corresponding Outages. "

Would std:: map<> (or even std:: vector<>) not be a better fit in this case?



The sum of all elements* in an array.may be found easily by invoking



for (const auto & Val: OutagesArray) {

  Sum += Val;

}

OR



's std:: for_each<> function:

http://en.cppreference.com/w/cpp/algorithm/for_each



class Sum {

  int val;

  Sum(): val(0) {}

  void operator (const int N) {val += N;}

};



int main(int, char **) {

  int Outages[] = {329, 123, 12048723, 123, -123124, -9123124};

  Sum s = std::for_each(Outages, Outages + 6, Sum());



  std:: cout << s.val;

}

Answer 3

I take it you're trying to sum every element of the array.



Just do a loop, make the loop variable go from the start of the array to the end. Keep accumulating the array values.



sum = 0;

for(i=0; i
sum = sum array[i];

}



Is really simple.