YOUR NAME:

CSCI 159 Quiz 2 (F24N01/02) Monday lab

The quiz is closed book, closed notes, no electronics permitted, and to be completed as a strictly individual exercise. You are permitted one double-sided 8.5" x 11" sheet of notes.

The quiz is worth a total of 10 marks. Attempt all questions, answering directly on the exam paper.

Note that when a code segment is requested you are only expected to put the requested lines of code, not the rest of a larger program it would be part of. If a complete program is requested, on the other hand, you should provide the entire program (#includes, int main, etc).

Question 1 [4 marks]
Consider the function prototype below then answer parts 1-3. 

// computes and returns pi to the power of p
float powerPi(int p);

  1. What is the return type of the function?

  2. What is the return type of the parameter?

  3. Assuming it was part of a correct main routine (and larger program), write a single line of code that makes a call to the function, passing 7 as the parameter and storing the returned value into a variable named 'answer'.

Question 2 [3 marks]
For the code segment below (assuming it's part of a larger correct program) answer questions 1 and 2. 

   // beginning of code segment
   if (a != b) {
      cout << "a is " << a << endl;
      if (b < 0) {
         cout << "b is negative" << endl;
      } else {
         cout << "b is not negative" << endl;
      }
   }
   // end of code segment

  1. As precisely as possible, what will be its output if a is 7 and b is 3?

  2. As precisely as possible, what will be its output if a and b are both -1?

Question 3 [3 marks]
As precisely as possible, show the output from the following program assuming the user types in 4 when they run it. 
#include <iostream>

void q3(int i, int n);

int main()
{
   int x;
   std::cout << "Enter an integer: ";
   std::cin >> x;
   q3(1, x);
}

void q3(int i, int n)
{
   if (i > n) {
      std::cout << "done!" << std::endl;
   } else {
      int v = i * 5;
      std::cout << v << std::endl;
      q3(i+1, n);
   }
}