/*
ACTION 7-2 (ACT07_02.CPP)
THIS PROGRAM WILL FIND THE EQUIVALENT RESISTANCE FOR ANY
NUMBER OF RESISTORS IN A PARALLEL CIRCUIT
*/

//PREPROCESSOR DIRECTIVE
#include <iostream.h>	//FOR cin AND cout

//MAIN FUNCTION
int main()
{
   //DEFINE VARIABLES
   int count = 0;		   //LOOP COUNTER
   int number = 0;	   //NUMBER OF RESISTORS IN CIRCUIT
	 double R_equiv = 0.0; //RESISTANCE OF CIRCUIT IN OHMS
   double R = 0.0;	   //INDIVIDUAL RESISTANCE VALUES IN OHMS

   //WRITE PROGRAM DESCRIPTION MESSAGE AND GET NUMBER 
   //OF PARALLEL RESISTORS
   cout <<	"\nThis program will calculate the equivalent resistance\n"
				<< "of any number of parallel resistors." << endl << endl;
   cout <<	"Enter the number of resistors in the parallel circuit:  ";
   cin >> number;

  //CALCULATE EQUIVALENT RESISTANCE USING WHILE
  while (count < number)
   {
		 ++count;
		 cout << "Enter the value for resistor #" << count << ": ";
		 cin >> R;
		 if (count == 1)
	    R_equiv = R;
		 else
	    R_equiv = (R_equiv * R) / (R_equiv + R);
   } //END WHILE
   
   cout.setf(ios::fixed);
   cout.precision(2);
   cout << "The equivalent resistance for the parallel circuit is:  "
				<<  R_equiv << " ohms" << endl;

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