Question

How to calculate the sum of all the even numbers in one-dimensional int array in C++

Answer 1

#include <iostream>

int main()
{
    int arr[] = { 1, 2, 3, 4, 5, 6, 7 };
    int sum = 0;
    int arr_size = sizeof(arr) / sizeof(arr[0]);
 
    for (int i = 0; i < arr_size; i++)
        if (arr[i] % 2 == 0)
            sum += arr[i];
 
    std::cout << "sum = " << sum << std::endl;
}


 
/*
run: 
 
sum = 12
 
*/

 

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