File: threecppexamples.txt             ( July 1998   Jacob Y. Kazakia)
Example 1
----------

/* Example welcome.cpp - Welcome to Lehigh

   Use the compiler Visual C++   */
                      

#include <iostream.h>                  // stream i/o library file access

//  Program to print a single statement           

void main( )                               // function heading

{
   cout<<" Welcome to Lehigh";

 //-------  Use the following three lines in order to keep the window open
 cout<<" \n\n enter e(exit) to exit ...." ;
 char hold;
 cin>>hold;

}

Example 2
-----------


/* Example area1.cpp - Area of a circle

   Use the compiler Visual C++   */                 

#include <iostream.h>                  // stream i/o library file access

//  Program to to calculate the area of a circle           

void main( )                                    // function heading

{
 float radius, area;                       // variable declarations (typing)

 cout << "radius = ?";                     // output statement (prompt)

 cin  >> radius;                           // input statement

 area=3.1415927*radius*radius;             // assignment  statement

 cout << " area =" <<  area ;              // output statement  

 //-------  Use the following three lines in order to keep the window open
 cout<<" \n\n enter e(exit) to exit ...." ;
 char hold;
 cin>>hold;
}


Example 3
-------------

/* example on the sum of 3 numbers entered      file: sumof3.cpp
   FALL 1998
   ___________________________________
   Jacob Y. Kazakia   jyk0
   July 1, 1998
   Programming assignment 001
   Recitation Instructor: J.Y.Kazakia
   Recitation Section  01
   ___________________________________
Purpose: This program calculates the sum of three numbers which are
            entered through the keyboard. 
Algorithm: The operation of addition.

                   sum = number-1 + number_2 + number_3        
*/

#include<iostream.h>                  // header which contains the functions
                                      // needed for input and output
void main()
{
//  variables are typed and defined

float sum;                            //  the value of the sum
float number_1, number_2, number_3;   //  the three numbers to be entered

// prompt for and read the first number

cout<< endl<<"Enter the first number  >>>";
cin>> number_1;

// prompt for and read the second number

cout<< endl<<"Enter the second number >>>";
cin>> number_2;

// prompt for and read the third number

cout<<endl<< "Enter the third number >>>";
cin>> number_3;

sum = number_1 + number_2 + number_3;

cout<<endl<<" The sum of the three numbers is: "<<sum;

cout<<endl<<endl;
 
//-------  Use the following three lines in order to keep the window open
 cout<<" \n\n enter e(exit) to exit ...." ;
 char hold;
 cin>>hold;   }