// Calculator
// source: http://www.planet-source-code.com/vb/scripts/ShowCode.asp?txtCodeId=4972&lngWId=3
#include <iostream>
using namespace std;
int main()
{
   long a,b,c,d,e,f,g,h,i,j,k,l,m,n;
   cout<<"1)Add"<<endl;
   cout<<"2)Subtract"<<endl;
   cout<<"3)Multiply"<<endl;
   cout<<"4)Divide"<<endl;
   cin >>a;
   if (a==1)
   {
      cout<<"Enter a number to add.";
      cin >>b;
      cout<<"Enter a second number to add.";
      cin >>c;
      d=b+c;
      cout<<d<<endl;
   }
   if (a==2)
   {
      cout<<"Enter a number to subtract.";
      cin >>e;
      cout<<"Enter a second number to subtract.";
      cin >>f;
      g=e-f;
      cout<<g<<endl;
   }
   if (a==3)
   {
      cout<<"Enter a number to multiply.";
      cin >>h;
      cout<<"Enter a second number to multiply.";
      cin >>i;
      j=h*i;
      cout<<j<<endl;
   }
   if (a==4)
   {
      cout<<"Enter a number to divide.";
      cin >>k;
      cout<<"Enter a second number to divide.";
      cin >>l;
      m=l/k;
      if (k > l)
      {
         cout<<"Error #";
      }
      cout<<m<<endl;
   }
   cout<<"Thank you for using the Mr.PoO's Calculator! Copyright (c) Mr.PoO Inc.Press any key and enter to exit.";
   cin >>n;
   if (n==' ')
   {
      return 0;
   }
}

1)Add
2)Subtract
3)Multiply
4)Divide
Thank you for using the Mr.PoO's Calculator! Copyright (c) Mr.PoO Inc.Press any key and enter to exit.