help with program please

int findMax() {

	int length = (sizeof(array) / sizeof(int)); // Initialized a variable to get the size of the array[]
	int max = 0; // Initilized max, if you use an uninitialized variable you'll get an error

	for (int i = 0; i < length; i++) {

		if (array[i] > max) { // Checked if the current array number is bigger than 0
			max = array[i]; // If True, change value of max to the current number in array
		}

	}
	return max; // Return the biggest number in array[]

}

#include <iostream>>

using namespace std;

int findMax(int array[], int length);

int main() {
	
	int array[10] = { 3, 5, 2, 7, 8, 4, 6, 7, 4, 11 };
	int length = (sizeof(array) / sizeof(int)); // Getting the size of the array

	int maxNum = findMax(array, length); // Since the function returns a variable, you need something to hold the variable
					 // Passed the array[] and length variable as argument to the function

	cout << maxNum << endl; // Display the max value returned

	return 0;
}

int findMax(int array[], int length) { // Pass an array and a length variable as parameter
	
	int max = 0;

	for (int i = 0; i < length; i++) {

		if (array[i] > max) {
			max = array[i];
		}

	}
	return max;
}