Chapter 5 Exercise Set 1: CPE Practice

1. What is the output of the following program?

   #include <iostream>
   using namespace std;
   
   int main() {
     bool ints = sizeof(long) >= sizeof(int) && sizeof(int) >= sizeof(short);
     bool floats = sizeof(float) == 0.5 * sizeof(double);
     bool chars = sizeof(char) == 1;
     int v = ints && floats && chars;
     cout << v << endl;
   
     return 0;
   }
   

   1. True

   2. False

   3. 1

   4. 0

2. What is the output of the following program?

   #include <iostream>
   using namespace std;
   
   int f() {
       return 1;
   }
   
   int f(int n) {
       return n + 1;
   }
   
   int f(int n, int m) {
       return n + m + 1;
   }
   
   int main() {
       cout << f() + f(0) + f(3, 4) << endl;
       return 0;
   }
   

3. What is the output of the following program?

   #include <iostream>
   using namespace std;
   
   int f() {
       return 1;
   }
   
   int f(int n) {
       return n % 2 == 0 ? 1 : 0;
   }
   
   int f(int n, int m) {
       return n > m ? n - m : m - n;
   }
   
   int main() {
       cout << f() + f(11) + f(3, 4) << endl;
       return 0;
   }
   

4. What is the output of the following program?

   #include <iostream>
   using namespace std;
   
   int f(int a) {
       int b = 0;
       int c = 5;
       int total = 0;
       while (--c)
           total += b;
       return total - a;
   }
   
   int f(int a, int b) {
       int c = 5;
       int total = 0;
       while (--c)
           total += b;
       return total - a;
   }
   
   int f(int a, int b, int c) {
       int total = 0;
       while (--c)
           total += b;
       return total - a;
   }
   
   int main() {
       cout << f(3, 1, 2) << f(5, 2) << f(0) << endl;
       return 0;
   }
   

5. What is the output of the following program?

   #include <iostream>
   using namespace std;
   
   int f(char x, float y) {
       return 2 * x + y;
   }
   
   int f(float x, char y) {
       return x - y;  
   }
   
   int f(int a, int b, int c) {
       int total = 0;
       while (--c)
           total += b;
       return total - a;
   }
   
   int main() {
       char c1 = 3;
       char c2 = 5;
       cout << f(1, 4, 2) << f(c2, 2.0) << f(4.0, c1) << endl;
       return 0;
   }
   

6. What is the output of the following program?

   #include <iostream>
   using namespace std;
   
   int f(char x) {
       return x * x;
   }
   
   int f(double g) {
       return int(g);
   }
   
   int f(int a, int b, int c) {
       int total = 0;
       while (--c)
           total += b;
       return total - a;
   }
   
   int f(double a, int b, char c) {
       return int(a + b + c);
   }
   
   int main() {
       char ch = 3;
       cout << f(2, 3, 4) << f(3.0, 1, ch) << f(1.0) << f(ch) << endl;
       return 0;
   }