PROGRAM KALKULATOR

#include <iostream>
#include <iomanip>
#include <cmath>
using namespace std;
 
void instructUser();
double doDivideZero(double &);
 
 
 
 
int main()
{
 instructUser();
 
 
 double displayedVal;
 double newEntry;
 char command_character ;
 
 
 displayedVal = 0.0;
 
 
 cout << "  Enter accepted Operator:" ;
 cin >> command_character;
 while (command_character != 'Q' || command_character != 'q')
 {
  switch(command_character)
  {
  case 'c':
  case 'C': displayedVal = 0.0;
      break;
  case '+': cout << "  Enter Number:";
      cin >> newEntry;
      displayedVal = displayedVal + newEntry;
      break;
  case '-': cout << "  Enter Number:";
      cin >> newEntry;
      displayedVal = displayedVal - newEntry;
      break;
  case '*': cout << "  Enter Number:";
      cin >> newEntry;
      displayedVal = displayedVal * newEntry;
      break;
  case '/': cout << "  Enter Number:";
         cin >> newEntry;
      displayedVal = displayedVal / newEntry;
      if (newEntry == 0)
      {
       doDivideZero(double &);
      }
 
      break;
  case '^': cout << "  Enter Number:";
      cin >> newEntry;
      displayedVal = pow (displayedVal,newEntry);
      break;
      default : cout << "  Unacceptable Operator(" << command_character << ")" << endl;
  }
  cout << "  The result so far is: " <<displayedVal<< endl;
  cout << "  Enter Operator:";
  cin >> command_character;
 
 
 }
 
 
 
 
 system ("pause");
 return 0;
}
 
void instructUser()
 
{
  cout << "                    " <<endl;
  cout << "  ***************************************************************************" <<endl;
  cout << "  *  This program takes your input and selected mathematical operator       *" <<endl;
  cout << "  *  and returns the answer to the screen. If an illegal operator is        *" << endl;
  cout << "  *  selected, an error message will be displayed. Be careful which         *" <<endl;
  cout << "  *  operator you select because the program depends on you for input.      *" <<endl;
  cout << "  *  The only error check function it has, is for unacceptable opreators.   *" <<endl;
  cout << "  *  Acceptable operators are : (+ , - , / , * ,^,c). The character c sets  *" <<endl;
  cout << "  *  the value stored to ZERO. Enter Q to exit. ENJOY YOUR PROGRAM !!!!!!   *" <<endl;
  cout << "  ***************************************************************************" <<endl;
  cout << "                     " <<endl;
 
 
 
}
 
double doDivideZero(double &)
{
 double newEntry;
 double displayedVal;
 newEntry =0;
 displayedVal = 0.0;
 
 
 
 if (newEntry !=0)
 {
  displayedVal = displayedVal / newEntry;
 } else cout << "Wrong Operation, Cannot Divide by Zero" << endl;
 
 
 
 
 return 0; 
}

:cry: :cry: :cry: