How to find the sum of elements of an Array using STL in C++?
Given an array arr[], find the sum of the elements of this array using STL in C++.
Example:
Input: arr[] = {1, 45, 54, 71, 76, 12} Output: 259 Input: arr[] = {1, 7, 5, 4, 6, 12} Output: 35
Approach: Sum can be found with the help of accumulate() function provided in STL.
Syntax:
accumulate(first_index, last_index, initial value of sum);
Below is the implementation of the above approach:
// C++ program to find the sum // of Array using accumulate() in STL #include <bits/stdc++.h> using namespace std; int main() { // Get the array int arr[] = { 1, 45, 54, 71, 76, 12 }; // Compute the sizes int n = sizeof (arr) / sizeof (arr[0]); // Print the array cout << "Array: " ; for ( int i = 0; i < n; i++) cout << arr[i] << " " ; // Find the sum cout << "\nSum = " << accumulate(arr, arr + n, 0); return 0; } |
Output:
Array: 1 45 54 71 76 12 Sum = 259