(Using C++) A program will repeatedly ask the user to input a value to rotate a

Question

(Using C++)

A program will repeatedly ask the user to input a value to rotate a mechanical arm by a certain angle (in degrees). This angle must be between -360 and 360 to avoid excessive rotation. The program terminates when an improper angle is provided. Write this program, and use the following function declaration.

/** * Prompts the user to input a number of degrees * and returns the value * * If the user provides a value < 359 or > 359 a * std::logic_error exception is thrown and the * return value undefined. */ int getDegrees();

The output of the program should match the following:

Enter an angle: 20 Rotating: 20

Enter an angle: -15

Rotating: -15

Enter an angle: 354 Rotating: 354

Enter an angle: -360

Caught an exception: Out of range

Of type: class std::logic_error

Press any key to continue . . .

Explanation / Answer

Please follow the code and comments for description :

CODE :

#include <iostream> // required header files
#include <stdexcept>

using namespace std;

int getDegrees(); // function declaration

int getDegrees() { // function initialisation
  
int angle; // local varaibles
   cout << "Enter an angle : "; // prompt for the data to be entered
   cin >> angle; // get the data
   try {
       if((angle <= 360) && (angle >= -360)) { // check for the condition
           return angle; // return the value if satisfied
       } else {
           throw logic_error("Caught an exception: Out of range Of type: class std::logic_error"); // else throw an exception
       }
   } catch(logic_error le) { // catch the error
       cout << le.what() << endl; // print to console
       exit(0); // exit the code
   }
   return 0;
}

int main() // driver method
{
int res = getDegrees(); // call the function
   cout << "Rotating : " << res; // print the output
   return 0;
}

OUTPUT :

Case 1 :

Enter an angle : 361
Caught an exception: Out of range
Of type: class std::logic_error

Case 2 :

Enter an angle : 345
Rotating : 345

Hope this is helpful.

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