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#include <iostream>
#include <stdlib.h>

using namespace std;
int main(int argc, char *argv[])
{
 int choices;
 long int a,b,c;
 std::cout << "Hi, welcome to Riotblade's calculator.\n";
 std::cout << "Select what you want to do.\n";
 std::cout << "(1)\tAdd\n";
 std::cout << "(2)\tSubtract\n";
 std::cout << "(3)\tDivide\n";
 std::cout << "(4)\tMultiply\n";
 std::cout << "(5)\tFormulas\n";
 std::cout << "(6)\tQuit\n";
 std::cin >> choices;
 switch (choices)
 {
 case 1:
  std::cout << "Enter two numbers.\n";
 std::cin >> a;
 std::cin >> b; 
 c=(a+b);
 std::cout << "Your answer is " << c << ".\n";
 break;
 case 2:
 std::cout << "Enter two numbers.\n";
 std::cin >> a;
 std::cin >> b;
 c=(a-b);
 std::cout << "Your answer is " << c << ".\n";
 break;
 case 3:
 std::std::cout << "Enter two numbers.\n";
 std::cin >> a;
 std::cin >> b;
 c=(a/b);
 std::cout << "Your answer is " << c << ".\n";
 break;
 case 4:
 std::cout << "Enter two numbers.\n";
 std::cin >> a;
 std::cin >> b;
 c=(a*b);
 std::cout << "Your answer is " << c << ".\n";
 break;
 case 5:
 std::cout << "Area Formulas\n";
 std::cout << "Square: a*a\n";
 std::cout << "Rectangle: a*b\n";
 std::cout << "Parallelogram: base*height\n";
 std::cout << "Trapezoid: Height/2(b1+b2)\n";
 std::cout << "Circle: Pi*Radius squared\n";
 std::cout << "Ellipse: pi*r1*r2\n";
 std::cout << "Triagle: 1/2*b*h\n";
 std::cout << "Equillateral Triangle: Squareroot of 3/4 * (a squared)\n";
 break;
 case 6:
 abort();
 break;
 
 } 
 system("PAUSE");
 return 0;
}