C++ Program to Find Sum and Product of Array Elements

This is a C++ Program to Calculate Product and Sum of all Elements in an Array.

Problem Description

The program takes an array of elements and calculates the sum and product of all elements of the array.

Problem Solution

1. The program takes an array of elements and stores them in an array.
2. Using a for loop, the sum and product of the array are calculated.
3. The result is printed.
4. Exit.

C++ Program/Source code

Here is the source code of C++ Program to Calculate Product and Sum of all Elements in an Array. The program output is shown below.

```
#include<iostream>
```
```
using namespace std;
```
```
int main ()
```
```
{
```

    int arr[10], n, i, sum = 0, pro = 1;

    cout << "Enter the size of the array : ";

```
    cin >> n;
```

    cout << "\nEnter the elements of the array : ";

```
    for (i = 0; i < n; i++)
```
```
    cin >> arr[i];
```
```
    for (i = 0; i < n; i++)
```
```
    {
```
```
        sum += arr[i];
```
```
        pro *= arr[i];
```
```
    }
```

    cout << "\nSum of array elements : " << sum;

    cout << "\nProduct of array elements : " << pro;

```
    return 0;
```
```
}
```

Program Explanation

1. The user is initially asked to enter the size of the array and the value is stored in ‘n’.
2. The variables ‘sum’ and ‘pro’ are initialized as 0 and 1 respectively.
3. The user is asked to enter the array elements. Using a for loop, the elements are stored in the array ‘arr’.
4. Taking a for loop and initializing ‘i’ as 0, the sum and product are calculated and stored in sum and pro respectively.
5. i is incremented in every iteration. The loop continues till i is less than n.
6. The result is then printed.

Runtime Test Cases

Case 1 :
Enter the size of the array : 5
Enter the elements of the array : 1 2 3 4 5
Sum of array elements : 15
Product of array elements : 120
 
Case 2 :
Enter the size of the array : 11
Enter the elements of the array : 11 10 9 8 7 6 5 4 3 2 1
Sum of array elements : 66
Product of array elements : 39916800
 
Case 3 :
Enter the size of the array : 3
Enter the elements of the array : 25 75 0
Sum of array elements : 100
Product of array elements : 0

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