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

    printf("Test 1: Address-of operator (&)\n");
    int x = 42;
    int addr = &x;
    printf("x = %d\n", x);
    printf("&x = %d\n", addr);
    printf("PASS: Address-of operator works\n");

    printf("Test 2: Dereference operator (*)\n");
    int y = 100;
    int *ptr = &y;
    int val = *ptr;
    printf("y = %d\n", y);
    printf("*ptr = %d\n", val);
    printf("PASS: Dereference operator works\n");

    printf("Test 3: Modify through pointer\n");
    int z = 50;
    int *p = &z;
    *p = 75;
    printf("After *p = 75, z = %d\n", z);
    printf("PASS: Pointer modification works\n");

    printf("Test 4: Multiple pointers\n");
    int a = 10;
    int b = 20;
    int *pa = &a;
    int *pb = &b;
    printf("a = %d, b = %d\n", a, b);
    printf("*pa = %d, *pb = %d\n", *pa, *pb);
    int sum = *pa + *pb;
    printf("*pa + *pb = %d\n", sum);
    printf("PASS: Multiple pointers work\n");

    printf("Test 5: Pointer with arrays\n");
    int arr[3];
    arr[0] = 1;
    arr[1] = 2;
    arr[2] = 3;
    printf("arr[0] = %d, arr[1] = %d, arr[2] = %d\n", arr[0], arr[1], arr[2]);
    int *arrptr = &arr;
    printf("Array base address: %d\n", arrptr);
    printf("PASS: Pointers with arrays work\n");

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