C 포인터 연습

int main() {

	int num = 10;

	int* ptr1 = #
	int* ptr2 = ptr1;

	(*ptr1)++;
	(*ptr2)++;

	printf("num : %d \n", num);  //12

}

 

int main() {

	int num1 = 10;
	int num2 = 20;

	int* ptr1 = &num1;
	int* ptr2 = &num2;
	int* cNum = 0;

	(* ptr1) += 10;
	(* ptr2) -= 20;

	printf("ptr1 : %d \n", *ptr1);
	printf("ptr2 : %d \n", *ptr2);

	cNum = ptr1;
	ptr1 = ptr2;
	ptr2 = cNum;

	printf("ptr1 : %d \n", *ptr1);
	printf("ptr2 : %d \n", *ptr2);

}