The University of Alabama in Huntsville
Electrical & Computer Engineering
CPE 197 02 Spring 2001
Test 3 Solution

1. The loop is executed for number - 2, 4, 6, 8, 10, 12, 14,
   16, 18, 20 for a total of 10 times.
2. a. 2
      3
      4
      5
      6
      7
      8
      9
      10
      11
   b. number = 1;
      while (number < 11)
      {
         cout << number << endl;
         number++;
      }
3. #include <fstream>
   ifstream indat;
   indat.open("input.dat");
    
   int score;
   int sum = 0;
   int count = 0;
   float average;
   
   indat >> score;
   while (indat)
   {
      if (score >= 0 && score <= 100)
      {
         count++;
         sum = sum + score;
      }
      indat >> score;
   }
   average = float(sum)/count;
4. 2 1 4
   2 1 3
   2 1 2
   2 1 1
5. size and length are reference parameters, initial is a value parameter
6. a. void Test(int, int, int);
   b. In the function call Test(a, c, b), a, c, and b are the arguments.
      In the function call Test(b, a, c), b, a, and c are the arguments.
   c. The variables a, b, and c are local to main.
      The variables g and h are local to Test.
   d. void Test(int d, int e, int f)
      {
          int g;
          int h;
            .
            .
            .
      }
      is a function definition
   e. In the function Test, d, e, and f are parameters.
   f. Test (a, c, b); and Test(b, a, c) are function calls.
7. First call
   parameter	argument
   s		d
   t		e
   
   Second call
   parameter	argument
   s		e
   t		d
8. In function Test, the variables equal 5 9
   In the main function after the first call, the variables equal 5 14
   In function Test, the varaibles equal 5 9
   In the main function after the second call, the varialbes equal 15 5
9. True
10. False
11. True
12. False
13. False
14. void rocket_sim(/* in */ float thrust,
                    /* inout */ float& weight,
                    /* in */ int timeStep,
                    /* in */ int totalTime,
                    /* out */ float& velocity,
                    /* out */ bool& outOfFuel)
15. void CountUpper(int& upCount)
    {
       upCcount = 0;
       char ch;
        
       cin >> ch;
    
       while (ch != '\n')
       {
          if (isupper(ch))
             upCount++
          cin >> ch;
       }
    }
16. void Rotate(/* inout */ int& firstValue,
                /* inout */ int& secondValue,
                /* inout */ int& thirdValue,
                /* inout */ int& fourthValue)
    {
       int temp;
       
       temp = firstValue;
       firstValue = secondValue;
       secondValue = thirdValue;
       thirdValue = fourthValue;
       fourthValue = temp;
    }
17. 1
    2
    5
    
    3
    4