C++ From Year 1995 Extras

 // Filename: BIT1.CPP

// Demonstrate &, |, ^, and ~ on two values

#include <iostream.h>

void main()

{

  int i = 5, j = 12;

  int answer;

  // Although this program applies the bitwise operators to

  // variables, bitwise operators also work on literal values

  answer = i & j;

  cout << "The result of i & j is " << answer << endl;

  answer = i | j;

  cout << "The result of i | j is " << answer << endl;

  answer = i ^ j;

  cout << "The result of i ^ j is " << answer << endl;

  // Notice how ~ takes only a single argument

  answer = ~i;

  cout << "The result of ~i is " << answer << endl;

  answer = ~j;

  cout << "The result of ~j is " << answer << endl;

  return;

}

===========================

// Filename: BITEQUI2.CPP

// Uses bitwise operators to work with user input

#include <iostream.h>

void main()

{

  int i, result;

  char c;

  cout << "Enter a number and I'll say if it's odd or even: ";

  cin >> i;

  if (i & 1)

    { cout << "The number is odd" << endl; }

  else

    { cout << "The number is even" << endl; }

  cout << endl << "Enter a number that you want multiplied by 32: ";

  cin >> i;

  result = i << 5;  // Multiplies by 2 raised to the 5th power

  cout << i << " times 32 is " << result << endl;

  result = i >> 3;

  cout << i << " divided by 8 is " << result << endl;

  cout << endl << "Please enter your first initial: ";

  cin >> c;

  if (c & 32)

    { cout << "Always type your initial in uppercase" << endl; }

  else

    { cout << "You entered the initial in uppercase, good!" << endl; }

  return;

}

========================

// Filename: BITEQUIV.CPP

// Uses bitwise operators to work with user input

#include <iostream.h>

void main()

{

  int i, result;

  char c;

  cout << "Enter a number and I'll say if it's odd or even: ";

  cin >> i;

  if ((i & 1) == 1)

    { cout << "The number is odd" << endl; }

  else

    { cout << "The number is even" << endl; }

  cout << endl << "Enter a number that you want multiplied by 32: ";

  cin >> i;

  result = i << 5;   // Multiply by 2 raised to the fifth power

  cout << i << " times 32 is " << result << endl;

  cout << endl << "Please enter your first initial: ";

  cin >> c;

  if (c & 32)

    { cout << "Always type your initial in uppercase" << endl; }

  else

    { cout << "You entered the initial in uppercase, good!" << endl; }

  return;

}

=========================

// Filename: BITSHIFT.CPP

// Shows the results of several bitwise shift operations

#include <iostream.h>

void main()

{

  int shiftResult;

  shiftResult = 13 << 2;

  cout << "13 << 2 is " << shiftResult << endl;

  shiftResult = 13 >> 2;

  cout << "13 >> 2 is " << shiftResult << endl;

  shiftResult = -13 << 2;

  cout << "-13 << 2 is " << shiftResult << endl;

  shiftResult = -13 >> 2;

  cout << "-13 >> 2 is " << shiftResult << endl;

  return;

}

======================

// Filename: BONUSP1.CPP

// Shows how the advanced operators give

// you more control and efficiency

#include <iostream.h>

const int MAKEUPPER = 223;

void main()

{

  char partCode;

  int num, doubleNum;

  float price;

  double totalInv;

  cout << "** Inventory Valuation **" << endl << endl;

  cout << "What is the character part code? ";

  cin >> partCode;

  

  partCode &= MAKEUPPER;   // Ensure that the part

                           // code is uppercase

  cout << "How many parts are there? ";

  cin >> num;

  cout << "What is the price of each part? ";

  cin >> price;

  cout.precision(2);

  cout.setf(ios::showpoint);

  cout.setf(ios::fixed);

  totalInv = (double)num * (double)price;

  cout << endl << "For part code " << partCode << ", ";

  cout << "the total valuation is $" << totalInv << endl;

  doubleNum = num << 1;   // Compute double the current number

  cout << endl << "Doubling our inventory would give us "

       << doubleNum << " new parts" << endl;

  (num < 20) ? cout << endl << "We need to order more inventory!" 

                    << endl

             :

               cout << endl << "We now have enough inventory"

                    << endl;

 }

================

// Filename: ORANGE.CPP

// See if the user likes orange juice

#include <iostream.h>

void main()

{

  const int UPMASK = 223;

  char ans;

  cout << "Do you like fresh squeeze orange juice (Y/N)? ";

  cin >> ans;

  ans &= UPMASK;  // Convert to uppercase

  if (ans == 'Y')

    { cout << "You'll be healthy all your life!" << endl; }

  else

    { cout << "You need the vitamin C!" << endl; }

  return;

}