!!! Final Review !!!

                                                                       

A)  C++ ARRAYS
1)What gets printed?
#include <iostream.h>
void fn( int q[], int c[] );
int main ( void )      
{ 
  int i, qa[]= {1, 1, 2, 2}, count[3] ={4, 4, 4}; 
  fn ( qa, count );
  for ( i = 0 ; i < 3; ++i )
    cout << count[i] << endl ;
  return 0;
}

void fn( int q[], int c[] )
{
  int i, j;
  for ( i = 0 ; i < 4 ; ++i )
    for ( j = 0; j < 3 ; ++j )
      if ( q[i] != j )
         c[j] -= 1;
}

2) What gets printed?
#include <iomanip.h>
#include <iostream.h>
void fn(int a1[]);
void swap(int & r1, int & r2);
int main ( void )
{
  int qa[] = {7, 9, 6, 8};
  fn(qa);
  cin >> qa[0];
  return 0;
}

void fn( int a1[] )
{
  int i, j, k;
  for ( i = 0 ; i < 3 ; ++i )
    for ( j = i + 1; j < 4 ; ++j )
      if ( a1[i] > a1[j] )
      {
         swap ( a1[i], a1[j] );
         for ( k = 0 ; k < 4 ; ++ k )
           cout << setw(3) << a1[k];
         cout << endl;
         for ( k = 0 ; k < 4 ; ++ k )
           if ( k == j || k == i )
             cout << "---";
           else
             cout << "   ";
          cout << endl;
      }
}

void swap(int &r1, int &r2)
{ int tmp;    tmp = r1;    r1  = r2;    r2  = tmp; }

B) C++ CLASS
1) What gets printed? 
#include <iostream.h>
class Time
{
     int hr;
   public:
     void get_time(int h){ hr = h; }
     void diff(Time d){ cout << hr - d.hr << endl; }
};

int main ( void )      
{ 
  Time dawn, now;
  dawn.get_time(6);
  now.get_time(13);
  now.diff(dawn);
  return 0;
}

C)  C++ CONSTRUCTORS
1) Use the program above to answer the following questions. 
a) Which is/are the:  no argument constructor(s)?  ("default constructor")
                      copy constructor(s)?
b) What gets printed? 
c) What happens in main(), if 2nd ctor, is changed to a default
   initializer? (e.g.  Book(int p = 0); )    
#include <iostream.h>
class Book
{
   int pg;
 public:
   Book(void){pg = 100;}                                 // A
   Book(int p){pg = p;}                                  // B
   Book(Book &b){pg = b.pg; cout << "hi\n";}             // C
   void diff(Book bb){ cout << bb.pg - pg << endl; } 
};

int main ( void )      
{ 
  Book mobyDick, hamlet(300);
  Book seaWolf(mobyDick);
  seaWolf.diff(hamlet);
  return 0;
}

D)  C++ I/O STREAMS
a) If "dear_john" looks like this: 
---------------------------------------------------------
      DEAR JOHN
      I love C++ more than YOU !!
      Farewell
---------------------------------------------------------
b) What does "dear_mom" look like after program is run?
c) What gets printed on the monitor screen?  
#include <fstream.h>
int main ( void )      
{ 
  char     ch;
  ifstream ifs("dear_john");
  ofstream ofs("dear_mom");
  while ( ifs.get(ch) )
  {
    if ( ch == 'J' || ch == 'H' )
      ofs.put('M');
    else 
      ofs.put(ch);
  }
  ofs << "The Real End...\n";
  cout << "The End...\n";
  return 0;
}