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int main() {
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printf("=== Pointer Tests ===\n");
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printf("Test 1: Address-of operator (&)\n");
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int x = 42;
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int addr = &x;
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printf("x = %d\n", x);
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printf("&x = %d\n", addr);
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printf("PASS: Address-of operator works\n");
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printf("Test 2: Dereference operator (*)\n");
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int y = 100;
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int *ptr = &y;
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int val = *ptr;
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printf("y = %d\n", y);
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printf("*ptr = %d\n", val);
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printf("PASS: Dereference operator works\n");
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printf("Test 3: Modify through pointer\n");
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int z = 50;
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int *p = &z;
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*p = 75;
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printf("After *p = 75, z = %d\n", z);
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printf("PASS: Pointer modification works\n");
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printf("Test 4: Multiple pointers\n");
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int a = 10;
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int b = 20;
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int *pa = &a;
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int *pb = &b;
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printf("a = %d, b = %d\n", a, b);
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printf("*pa = %d, *pb = %d\n", *pa, *pb);
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int sum = *pa + *pb;
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printf("*pa + *pb = %d\n", sum);
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printf("PASS: Multiple pointers work\n");
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printf("Test 5: Pointer with arrays\n");
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int arr[3];
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arr[0] = 1;
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arr[1] = 2;
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arr[2] = 3;
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printf("arr[0] = %d, arr[1] = %d, arr[2] = %d\n", arr[0], arr[1], arr[2]);
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int *arrptr = &arr;
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printf("Array base address: %d\n", arrptr);
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printf("PASS: Pointers with arrays work\n");
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printf("\n=== All Pointer Tests Completed ===\n");
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return 0;
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}
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