Homework 7  (Due Nov. 13 in class)

Read: Section 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9;
                 Pay special attention on 4.2, 4.3, 4.4, 4.6, 4.8, 4.9;
                 Compile and run the 19 examples in Chapter 4.

(Problem 1), (10 pts).
(A) (2 pts) 4-18,  on page 296.  (If you don't know the answer, test it)
(B) (2 pts) 4-21,  on page 297.  (If you don't know the answer, test it)
(C) (6 pts) 4-15,  on page 295.  (The solution is given, your job is to modify it.  Instead of inputting 20
                                                        numbers, use rand() to generate 20 random numbers)

(Problem 2), (10 pts).  4-17,  on page 295.

(Problem 3), (10 pts).  4-11, part (a),  on page 294.

(Problem 4),  (5 pts).   4-14,   on page 295.
(You need only do one of the "median" OR "mode".  If you can do both, you will get 5 extra pts)

Exam-4 on Dec. 4  (covers Chapter 4).

Hint:

// Exercise 4.15 Solution
#include <iostream>
using std::cout;
using std::endl;
using std::cin;
#include <iomanip>
using std::setw;

int main()
{ const int SIZE = 20;
   int a[ SIZE ] = { 0 }, subscript = 0, duplicate, value;
   cout << "Enter 20 integers between 10 and 100:\n";
   for ( int i = 0; i < SIZE; ++i ) {
      duplicate = 0;
      cin >> value;
      for ( int j = 0; j < subscript; ++j )
         if ( value == a[ j ] ) {
            duplicate = 1;
            break;
         }
      if ( !duplicate )
         a[ subscript++ ] = value;
   }
   cout << "\nThe nonduplicate values are:\n";
   for (int  i = 0; a[ i ] != 0; ++i )
      cout << setw( 4 ) << a[ i ];
   cout << endl;
   return 0;
}

// Exercise 4.17 hint: study the solution of hw 3-34, and then study the following:
   for ( long i = 1; i <= ROLLS; ++i ) {
      x = 1 + rand() % 6;
      y = 1 + rand() % 6;
      ++sum[ x + y ];
   }

   cout << setw( 10 ) << "Sum" << setw( 10 ) << "Total" << setw( 10 )
        << "Expected" << setw( 10 ) << "Actual\n"
        << setiosflags( ios::fixed | ios::showpoint );

   for ( int j = 2; j < SIZE; ++j )
      cout << setw( 10 ) << j << setw( 10 ) << sum[ j ] << setprecision( 3 )
           << setw( 9 ) << 100.0 * expected[ j ] / 36 << "%" << setprecision( 3 )
           << setw( 9 ) << 100.0 * sum[ j ] / 36000 << "%\n";

// Exercise 4.11 Part A hint:
study  page 263-264 first. Only a few small changes on Fig4.16 are needed.
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