Question

I need my code output values edited to be formatted to two decimal places (i believe using setprecision), i will need you to edit my code toformat each menu option to 2 decimal places: provided is my code

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

int main()
{
   double radius;
   double base;
   double height;
   double length;
   double width;
   double Area;
   const double PI = 3.14159;
   int choice;

   // display menu
   cout << "Geometry Calculator" << endl << endl;
   cout << " 1. Calculate the Area of a Circle" << endl;
   cout << " 2. Calculate the Area of a Rectangle" << endl;
   cout << " 3. Calculate the Area of a Triangle" << endl;
   cout << " 4. Quit" << endl << endl;
   cout << "Enter your choice (1-4):" << endl;
   cin >> choice;

   //validate and process the menu

   switch(choice)
   {
       case 1:

           cout << "\n";
           cout << "Enter the radius of the circle: ";
           cin >> radius;

           if (radius > 0)
           {
               Area = PI * radius * radius;

               cout << "\n";
               cout << "Area of Circle is: " << Area << setprecision(2) << endl;

           }
           else
           {
               cout << "The radius can not be less than zero. Only enter positive values for your radius.";
           }
           break;

       case 2:

           cout << "\n";
           cout << "Enter the length of the rectangle: ";
           cin >> length;
           cout << "Enter the width of the rectangle: ";
           cin >> width;

           if (length > 0 && width > 0)
           {
               Area = length * width;

               cout << "\n";
               cout << "Area of Rectangle is: " << Area << endl;
           }
           else
           {
               cout << "\nOnly enter positive values for length and width.";
           }
           break;

       case 3:

           cout << "\n";
           cout << "Enter the base of the Triangle: ";
           cin >> base;
           cout << "Enter the height of the Triangle: ";
           cin >> height;

           if (base > 0 && height > 0)
           {
               Area = 0.5 * base * height;

               cout << "\n";
               cout << "Area of the Triangle is: " << Area << endl;
           }
           else
           {
               cout << "\nOnly enter positive values for base and height.";
           }
           break;

       case 4:

           cout << "Exiting Geometry Calculator\nGoodbye!\n";
           break;

       default: cout << "Sorry, that was an invalid entry!\nPlease re-run the program and "
           << "enter a valid menu choice.\n";
}
return 0;
}

Answer 1

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

int main()
{
   double radius;
   double base;
   double height;
   double length;
   double width;
   double Area;
   const double PI = 3.14159;
   double tmp;
   int choice;

    cout<<fixed<<setprecision(2);
   // display menu
   cout << "Geometry Calculator" << endl << endl;
   cout << " 1.00 Calculate the Area of a Circle" << endl;
   cout << " 2.00 Calculate the Area of a Rectangle" << endl;
   cout << " 3.00 Calculate the Area of a Triangle" << endl;
   cout << " 4.00 Quit" << endl << endl;
   cout << "Enter your choice (1.00-4.00):" << endl;
   cin >> tmp;
   choice = (int)tmp;

   //validate and process the menu

   switch(choice)
   {
       case 1:

           cout << "\n";
           cout << "Enter the radius of the circle: ";
           cin >> radius;

           if (radius > 0)
           {
               Area = PI * radius * radius;

               cout << "\n";
               cout << "Area of Circle is: " << Area << setprecision(2) << endl;

           }
           else
           {
               cout << "The radius can not be less than zero. Only enter positive values for your radius.";
           }
           break;

       case 2:

           cout << "\n";
           cout << "Enter the length of the rectangle: ";
           cin >> length;
           cout << "Enter the width of the rectangle: ";
           cin >> width;

           if (length > 0 && width > 0)
           {
               Area = length * width;

               cout << "\n";
               cout << "Area of Rectangle is: " << Area << endl;
           }
           else
           {
               cout << "\nOnly enter positive values for length and width.";
           }
           break;

       case 3:


           cout << "\n";
           cout << "Enter the base of the Triangle: ";
           cin >> base;
           cout << "Enter the height of the Triangle: ";
           cin >> height;

           if (base > 0 && height > 0)
           {
               Area = 0.5 * base * height;

               cout << "\n";
               cout << "Area of the Triangle is: " << Area << endl;
           }
           else
           {
               cout << "\nOnly enter positive values for base and height.";
           }
           break;

       case 4:

           cout << "Exiting Geometry Calculator\nGoodbye!\n";
           break;

       default: cout << "Sorry, that was an invalid entry!\nPlease re-run the program and "
           << "enter a valid menu choice.\n";
}
return 0;
}