cppbeginner10 minutes

Fix the Bug in Counting Even Numbers in an Array

Identify and fix the bug in the given C++ function that is supposed to count the number of even numbers in an integer array.

Challenge prompt

The function countEvens takes an integer array and its size as input and should return the count of even numbers in the array. However, it currently returns incorrect results. Debug the function to make it work correctly.

Guidance

• Check how the function iterates over the array.
• Verify the condition used to identify even numbers.
• Ensure the counter is updated properly within the loop.

Hints

• Remember that an even number is divisible by 2 with zero remainder.
• Make sure the loop uses the correct index and does not go out of bounds.

Starter code

int countEvens(int arr[], int size) {
    int count = 0;
    for (int i = 1; i <= size; i++) {
        if (arr[i] % 2 == 1) {
            count++;
        }
    }
    return count;
}

Expected output

For array {1, 2, 3, 4, 5, 6}, countEvens should return 3.

Core concepts

loopsarraysconditionalsmodulus operator

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