int main() {
    printf("=== Array Tests ===\n");

    printf("Test 1: Array declaration and initialization\n");
    int arr[5];
    arr[0] = 10;
    arr[1] = 20;
    arr[2] = 30;
    arr[3] = 40;
    arr[4] = 50;
    printf("arr[0] = %d\n", arr[0]);
    printf("arr[1] = %d\n", arr[1]);
    printf("arr[2] = %d\n", arr[2]);
    printf("arr[3] = %d\n", arr[3]);
    printf("arr[4] = %d\n", arr[4]);
    printf("PASS: Array indexing works\n");

    printf("Test 2: Array modification\n");
    arr[2] = 100;
    printf("After arr[2] = 100: arr[2] = %d\n", arr[2]);
    printf("PASS: Array element modification works\n");

    printf("Test 3: Loop through array\n");
    int i = 0;
    int sum = 0;
    while (i < 5) {
        sum = sum + arr[i];
        i = i + 1;
    }
    printf("Sum of array elements: %d\n", sum);
    printf("PASS: Array iteration works\n");

    printf("Test 4: Array with calculations\n");
    int nums[3];
    nums[0] = 5;
    nums[1] = 10;
    nums[2] = 15;
    int total = 0;
    total = total + nums[0];
    total = total + nums[1];
    total = total + nums[2];
    printf("nums[0] + nums[1] + nums[2] = %d\n", total);
    printf("PASS: Array arithmetic works\n");

    printf("Test 5: Larger array\n");
    int big[10];
    int j = 0;
    while (j < 10) {
        big[j] = j * j;
        j = j + 1;
    }
    printf("Squares (0-9): ");
    int k = 0;
    while (k < 10) {
        printf("%d ", big[k]);
        k = k + 1;
    }
    printf("\n");
    printf("PASS: Larger arrays work\n");

    printf("\n=== All Array Tests Completed ===\n");
    return 0;
}