Chapter 8 Exercise Set 1: CPE Practice

1. What is the output of the following program?

   #include <iostream>
   using namespace std;
   
   struct A
   {
       int a;
       float b;
   };
   
   struct B
   {
       int b;
       float a;
   };
   
   struct C
   {
       A a;
       B b;
   };
   
   int main() {
       C c1 = {1, 2, 3, 4}, c2 = {5, 6, 7, 8};
       cout << c1.b.a + c2.a.b << endl;
   
       return 0;
   }
   

2. What is the output of the following program?

   #include <iostream>
   using namespace std;
   
   struct A
   {
       int a;
       char b;
   };
   
   struct B
   {
       char a;
       int b;
   };
   
   int main() {
       A a = {2, 'A'};
       B b = {'C', 1};
       cout << b.a - a.b - b.b + a.a << endl;
   
       return 0;
   }
   

3. What is the output of the following program?

   #include <iostream>
   using namespace std;
   
   int f(int n) {
       ++n;
       return n++;
   }
   
   int f2(int &n) {
       ++n;
       return n++;
   }
   
   int main() {
       int x = 2, y, z;
       y = f(x);
       z = f2(y);
       cout << x + y + z << endl;
       return 0;
   }
   

4. What is the output of the following program?

   #include <iostream>
   using namespace std;
   
   struct A
   {
       char a;
       char b;
   };
   
   struct B
   {
       char a;
       double b;
   };
   
   struct C
   {
       A a;
       B b;
   };
   
   int main() {
       A a = {'a', 'A'};
       B b = {'B', 3.14};
       C c = {{'c', 'C'}, {'d', 4.9}};
       cout << (a.b < c.b.a) << ' ' << c.a.a + b.b << ' ' << char(a.b + 5);
       cout << endl;
       return 0;
   }