About a code.

Question

Hey, I have been trying for a few days to figure out what how to get my code to compile. can someone figure out the issue?

#include <iostream>
#include <iomanip>
using namespace std;

int main()
{
int choose;

double length, width, area;
double radius;

// Constants for numbers
const double PI = 3.14;

// Constants for menu choices
const double SQUAREROOM = 1,
RECTANGULARROOM = 2,
ROUNDROOM = 3,
QUIT = 4;

// A) Show Haverly's Room Calculator.
cout << "Haverly's Room Calculator : \n";
cout << "************************\n";
cout << "1. Square Room\n";
cout << "2. Rectangular Room\n";
cout << "3. Round Room\n";
cout << "4. Quit\n";
cout << endl;
cout << "Please enter a menu item(1-4)\n";
cin >> choose;

// Set the output formatting
cout << fixed << showpoint << setprecision(2);

// B) Enter input from user.
if (choose SQUAREROOM > 0)
{
cout << "Please enter the width of the room.";
cin >> width;
area = width*width;
cout << "The area of the squareroom is" << area << endl;
}
if (choose RECTANGULARROOM > 0)
{ cout << "Enter the length and width of the room.";
cin >> length >> width;
area = length*width;
cout << "The area of the rectangular room is" << area << endl;
}
if (choose ROUNDROOM > 0)
{
cout << " Enter the radius of the room.";
cin >> radius;
area = PI*(radius*radius);
cout << "The area of the round room is" << area << endl;
}
if (choose QUIT )
{
cout << "Thank you for using Haverly's Room Calculator...";
}
return 0;
}

Answer 1

The comparison in your if-statements should look like
if (choose == SQUAREROOM) {...}
and so on.
You also might want to use int for those constants (except for PI, of course), even if it is technically not neccessary.