CSCI 3300
Fall 2009
Exercises for Quiz 1

1. What is the value of C++ expression 5 * 4 - 6 * 3 - 9?

   1. -7
   2. -19
   3. 1
   4. 11
   5. 33
   Answer

2. What is the value of C++ expression 9/4 + 1?

   1. 1.25
   2. 2
   3. 2.25
   4. 3
   5. 3.25
   Answer

3. Function g is defined below. What is the value of expression g(3)?

   1. 0
   2. 6
   3. 9
   4. 3
   5. 12

  int g(int n)
  {
    if(n > 3) return 0;
    else return 2*n+3;
  }

Answer

4. Using function g from the preceding exercise, what is the value of expression g(g(3))?

   1. 0
   2. 9
   3. 18
   4. 21
   5. 25
   Answer

5. Suppose that variable y, of type double, already exists and has a value. Write a statement or sequence of statements that (1) creates a variable called frame of type double, and (2) makes frame hold value (y² - 7y + 4)/9. Be sure to use C++ notation correctly. The expression shown is not in C++ notation, but in standard mathematical notation. Answer

6. Suppose that variable u has type double, and has already been given a value. Write a statement or statements that create variable m, of type double, and make m hold the absolute value of u. For this exercise, do not use the C++ abs function, or any close relative of it. (The absolute value of 4.0 is 4.0, and the absolute value of -4.0 is 4.0.) Answer

7. Using your solution to the preceding exercise, write a definition of function absoluteValue(u), where u has type double. It should return the absolute value of u. Answer