C-style Arrays

Fixed-size Collections

int scores[5] = {90, 85, 78, 92, 88};

cout << scores[0];   // 90  (zero-indexed)
cout << scores[4];   // 88
scores[2] = 80;      // modify element

Iterating

int nums[4] = {10, 20, 30, 40};
int total = 0;
for (int i = 0; i < 4; i++) total += nums[i];

Passing arrays to functions

Arrays decay to pointers — always pass the size separately:

int sum(int arr[], int size) {
    int s = 0;
    for (int i = 0; i < size; i++) s += arr[i];
    return s;
}
int data[] = {1,2,3};
cout << sum(data, 3);  // 6

Your Task

Write arrayMax(int arr[], int size) that returns the largest element.