How do I calculate the mean of an array in C++?

How do I calculate the mean of an array in C++?

To calculate the mean, you need to sum all the elements of the array and then divide by the number of elements.

Can you show me a code example?

Sure! Here's a simple example:

#include <iostream>
using namespace std;

int main() {
    int arr[] = {1, 2, 3, 4, 5};
    int sum = 0;
    int n = sizeof(arr) / sizeof(arr[0]);

    for(int i = 0; i < n; i++) {
        sum += arr[i];
    }

    double mean = static_cast<double>(sum) / n;
    cout << "Mean: " << mean << endl;
    return 0;
}

What if the array has negative numbers?

The calculation remains the same. The mean will account for negative values in the sum.

Is there a way to handle large arrays efficiently?

Yes, you can use algorithms to optimize the summation process, or consider using parallel processing for very large datasets.