CPSC170A
Fundamentals of Computer Science II

For each of the follwing, what will be printed when it is run. If it produces a compile or runtime error, just put error. If prints something, but it can’t be predicted, put unknown.

1. int main() {
     int x = 1;
     int y = 2;
     std::cout << x << " " << y  << std::endl;
     std::cout << &x << " " << &y  << std::endl;
     return 0;
   }

2. int main() {
     int x = 1;
     int y = 2;
     int* p1 = &x;
     int* p2 = &y;
     std::cout << p1 << " " << p2  << std::endl;
     std::cout << *p1 << " " << *p2  << std::endl;
     return 0;
   }

3. int main() {
     int x = 1;
     int y = 2;
     int* p1 = &x;
     int* p2 = &y;
     x = 3;
     std::cout << *p1 << " " << *p2  << std::endl;
     return 0;
   }

4. int main() {
     int x = 1;
     int y = 2;
     int* p1 = &x;
     int* p2 = &y;
     x = y;
     std::cout << *p1 << " " << *p2  << std::endl;
     y = 3;
     std::cout << *p1 << " " << *p2  << std::endl;
     return 0;
   }

5. int main() {
     int x = 1;
     int y = 2;
     int* p1 = &x;
     int* p2 = &y;
     int z = 3;
     p1 = &z;
     std::cout << *p1 << " " << *p2  << std::endl;
     return 0;
   }

6. int main() {
     int x = 1;
     int y = 2;
     int* p1 = &x;
     int* p2 = &y;
     p1 = p2;
     std::cout << *p1 << " " << *p2  << std::endl;
     int z = 3;
     p2 = &z;
     std::cout << *p1 << " " << *p2  << std::endl;
     return 0;
   }

7. int main() {
     int x = 1;
     int y = 2;
     int* p1 = &x;
     int* p2 = &y;
     *p1 = 3;
     *p2 = *p1;
     std::cout << *p1 << " " << *p2  << std::endl;
     return 0;
   }

8. struct Point {
     int x, y;
     int get_x() const;
     void print() const;
   }
   
   int Point::get_x() const {
     return x;
   }
   
   void Point::print() const {
     std::cout << this->x << std::endl;
   }
   
   int main() {
     Point pt = {1, 2};
     Point* pp = &pt;
     std::cout << *pp.get_x() << std::endl;
     std::cout << *(pp.get_x()) << std:endl;
     std::cout << (*pp).get_x() << std:endl;
     std::cout << pp->get_x() << std:endl;
     pp->print();
   }

Write the C++ function void swap(int* num1, int* num2) that swaps the referenced values of the two integer pointer parameters.