Calculator Tutorial

[mcqueen]

Sorry for the re-post. This is a tutorial on how to make a calculator. Not just a basic calculator, basically a graphing calculator without the graphing functions. I also will say, posting for this tutorial may be slow at first (I'm just adding the final touches on my Yahtzee game), but don't worry, I'll get it posted. So, let's start.

Step 1:

#include <cstdlib>
#include <iostream>
#include <math.h> //for shortening some functions
#include <vector> //we will use vectors instead of switch function
#include <valarray> //for some functions we will use valarrays instead of vectors

using namespace std;

double basfunc(double x, double y) //basic functions
{
   double add, sub, mult, div ; //add, subtract, multiply, and divide
   int operbf ; //operation for basic functions
   cout<<"Enter two numbers." <<endl ;
   cin>> x ;
   cin>> y ;
      add=x+y ;
      sub=x-y ;
      mult=x*y ;
      div=x/y ;
   vector<double> BasFunc ;
   BasFunc.push_back(add) ; //adds add
   BasFunc.push_back(sub) ; //adds subtract
   BasFunc.push_back(mult) ; //adds multiply
   BasFunc.push_back(div) ; //adds divide
   cout<<"Enter an operation. 1-add, 2-subtract, 3-multpily, 4-divide." <<endl ;
   cin>> operbf ;
   cout<<BasFunc[operbf-1] ;
}

That's Step 1, adding our basic functions. Look for Step 2 soon!

[buffbill]

Will it evaluate expressions like this correctly: 2+5/(7-3)*5-(1.5*3/9)-8 when its finished?