Pointer 주소 교환
#include int main() {int val = 50;int val2 = 100; int *ptr = &val;int *ptr2 = &val2;int *ptr3 = NULL; *ptr = *ptr + *ptr2;// 50 + 100*ptr2 = val + val2;// 150 + 100 printf("#0 val: %d, addr: %p\n", val, &val);printf("#0 val2: %d, addr: %p\n\n", val2, &val2); printf("#1 *ptr: %d, addr: %p\n", *ptr, ptr);// 150printf("#1 *ptr2: %d, addr: %p\n\n", *ptr2, ptr);// 250 ptr3 = ptr;// ptr3 is valptr = p..