C / C++ / MFC

#include < iostream >
#include < string >

using std::cout;
using std::cin;
using std::endl;
using std::string;


const string EQUIL = "equilateral";
const string ISOS = "isosceles";
const string SCALE = "scalene";


void DisplayOpeningScreen();
void Print6BlankLines();

int main()

{
   int side1 = 0;
   int side2 = 0;
   int side3 = 0;
   int halfper = 0;
   int area = 0;
   string sType;


// Display an opening screen and explain the program to the user

DisplayOpeningScreen();


// Have the user input 3 values representing the sides of a triangle

cout << "\nEnter first side of triangle: ";
cin >> side1;
cout << "Enter second side of triangle: ";
cin >> side2;
cout << "Enter thrid side of triangle: ";
cin >> side3;


if ((side1 + side2) > side3 && (side2 + side3) > side1 && (side1 + side3) > side2)
{ 

  cout << "\n\nThe three lengths can form a triangle.\n\n";

  if ((side1 == side2) && (side2 == side3) && (side1 == side3))
       sType= EQUIL;
   else if ((side1 == side2) || (side2 == side3) || (side1 == side3))
       sType = ISOS;
   else;
       sType = SCALE;

   cout << "This triangle is an " << sType << " triangle.  \r\n\r\n";

}
else
{
   cout << "\n\nThe three lengths can not form a triangle.\n\n";
}