Review for CS150 Final

• Writing (or explaining) program segments dealing with:
  if statements
  switch statements
  while loops
  for loops
  do-while loops
• Expressions using relational and/or logical operators
• Advanced output setw, fixed, setprecision
  
• Rewriting if blocks as switch blocks and visa versa
• Rewriting loops in one form to another
• Nested loops (tracing or writing solutions to nested loop problems)
  
• Correcting syntax, logic, and/or runtime errors
• Writing or explaining data file segments including reading from and/or writing to files
  
• Tracing function calls with various parameter passing options ( your favorite)
• Writing functions including passed by reference and passed by value
• Functions calling other functions
  
• Make sure you understand the various data types and type casting
• Arrays (1D and 2D)
• Character processing
  

P#1 (Easy): Write a function computeEven that accepts an array values and the number of values currently in the array, howmany. The function computeEven returns through the function name the number of values in the array that are even. Your function might be called by a statement of the form:

cout << "Number of evens = " << computEven (values, howmany) << endl;

P#6 (Easy): An integer array values has been defined and filled beginning at subscript 0 with howmany elements in the array.

a) Write a prototype for a void function insert that will accept the array values, howmany elements in the array, and a new integer value to be inserted at the end of the array.

b) Write the actual function insert described in a) completely.

P#7: (Hard): Assume the array in P#6 is sorted from smallest to largest. Insert the value into the array in the proper position of the array preserving the sorted nature of the array.

P#8: (Medium): What will the following C++ program print?

	#include <iostream.h>
	void change (int&, int, int&);
	void main()
	{
	  int i, j, k;
	  i = 22;
	  j = 4;
	  k = 7;
	  change (i, j, k);
	  cout << i << "  " << j << "  " << k << "  " << endl;
	  change (k, i, j);
	  cout << i << "  " << j << "  " << k << "  " << endl;
	}
	void change (int& i, int j, int& k)
	{
	  i = i + k;
	  j = i / 3;
	  k = i % j;
	}

pi = 4 - 4/3 + 4/5 - 4/7 + 4/9 - 4/11 + ....

  cout << "Pi = " << computePi(numterms) << endl;

where numterms is an integer value containing the number of terms to be used from the above sequence.

P#10 (Easy): Given the following prototypes and declarations, place a check by only the illegal procedure calls in the following list AND specify what caused the error.

	int compute (int, int&, int);
	float doit (float&, int, float, char&);

	void main()
	{
	  int i,j;
	  int nums[10];
	  float x,y;
	  char ch;


_____ a) compute (i, j, i + j);


_____ b) compute (i, nums[1], char ch);


_____ c) doit (x, i, y, 'c');


_____ d) doit (x + y, nums[i], y, ch);


_____ e) doit (x, 3, x, static_cast<char>( static_cast<int>('a') + 1)));

P#11 (Easy): Explain what is meant by the scope of a variable.

int count = 0;

char ch;

cin.get (ch);
while (!cin.eof())
{
  if (ch = '\n')
  {
    count++;
  }
  else
  {
    cin.get (ch);
  }

cout << count << endl;