RPN Calc

/*
Lily O'Malley
Date: 1/20/17
Description: This is a modification of a simple
RPN calculator to add multiplication and devision
operations to the calculator alongside a command
to display entered operands.
*/
#include <iostream>
#include <vector>
#include <stack>
#include <stdio.h>
using namespace std;

int
main()
{
   stack<double> operands;
   stack<double> temp;

   double nextNumber;
   char   nextOperation;

   double operand1;
   double operand2;

   cout << "Type \"q\" when you are done\n";

   while ( cin && cin.peek() != EOF )
   {
      char ch = cin.peek();

      switch ( ch )
      {
        // digit or decimal point
        case '0':
        case '1':
        case '2':
        case '3':
        case '4':
        case '5':
        case '6':
        case '7':
        case '8':
        case '9':
        case '.':
         cin >> nextNumber;
         operands.push( nextNumber );
         break;

        // arithmetic operation
        case '+':
        case '-':
        case '*':
        case '/':
        cin >> nextOperation;

         // handle unary minus
         if ( ( cin.peek() >= '0' && cin.peek() <= '9' ) || cin.peek() == '.' )
         {
            cin >>nextNumber;
            operands.push( -nextNumber );
	    break;
         }

         // do binary operation
         if ( operands.size() < 2 )
         {
            cout << "Not enough operands for " << nextOperation << "\n";
         }
         else
         {
            operand2 = operands.top();
            operands.pop();
            operand1 = operands.top();
            operands.pop();

            switch ( nextOperation )
            {
              case '+':
               operands.push( operand1 + operand2 );
               break;
              case '-':
               operands.push( operand1 - operand2 );
               break;
		case '*':
               operands.push( operand1 * operand2 );
               break;
		case '/':
               operands.push( operand1 / operand2 );
               break;
            }

            cout << "-----\n";
            cout << operands.top() << "\n\n";
         }

         break;

        // display stack operation
        case ':':

//INFINITE LOOP -
    for (temp = operands; !temp.empty(); temp.pop())
    {
        cout << "Operand: " << temp.top() << endl;
    }

    /*
	while (!operands.empty())
	{
     	 	cout << operands.top() << endl;
      		operands.pop();
    }
	*/

	break;

        // ignore other characters
        default:
         cin.ignore();
         break;
      }

      if (ch == 'q')
         break;
   }

   // report errors
   if ( operands.size() > 1 )
   {
      cout << "Left over operands in the stack\n";
      return -1;
   }

   return 0;    // normal exit code
}