/*
EXAMPLE 7-1 (EX07_01.CPP)
*/

//PREPROCESSOR DIRECTIVES
#include <iostream.h>

//MAIN FUNCTION
int main()
{

//a.
int number = 5;
int sum = 0;
while (number > 0)
{
  sum += number;
  --number;
} //END WHILE

cout << "The sum is " << sum << endl;

//b.
sum = 0;
while (number > 0)
{
  sum += number;
  --number;
} //END WHILE
cout << "The sum is " << sum << endl;

//c.
number = 5;
sum = 0;
while (number > 0)
{
  if (number % 2 != 0)
       sum += number;
  --number;
} //END WHILE
cout << "The sum is " << sum << endl;

//d.
number = 5;
sum = 0;
while (number > 0)
{
  if (number % 2 == 0)
       sum += number;
  --number;
} //END WHILE
cout << "The sum is " << sum << endl;

//e. INFINITE LOOP

//f. INFINITE LOOP

//g.
  bool positive = true; 	//DEFINE BOOLEAN FLAG VARIABLE
		                       //ASSUMES ANSI/ISO STANDARD
  number = 0;			
  sum = 0;	
  while (positive == true)
  {
     cout << "\nEnter an integer value: ";     //GET A NUMBER	
     cin >> number;
     if (number < 0)		//SET FLAG TO FALSE IF NUMBER < 0
					{
	       positive = false;
        cout << "Loop terminated" << endl;
     }//END IF
     else			//ADD NUMBER TO SUM AND DISPLAY
     {
	   sum = sum + number;
	   cout << "The sum is now: " << sum << endl;
     }//END ELSE
  }//END WHILE


	//RETURN
	return 0;
}//END main()