Question

This program is supposed to identify whether I inputted a number or a letter through enumerated types and an array of messages. I'm aware that you can't compare strings and enums but I'm out of ideas. What method do you suggest.

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

int main() {
   enum letters { A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z} ;
   enum numbers {zero, one, two, three, four, five, six, seven, eight, nine} ;
   const string labeling[] = {"letter", "number"}; //array of messages;
   int x;
   numbers Numbers; //declare a variable of this enumerated type
   letters Letters;
   cout << "insert capital letters A-Z or zero-nine";
   cin >> x;
   if (Numbers == x){
       cout << labeling[1];
   }

   if( Letters == x){
       cout << labeling[0];
   }

}

Answer 1

/*C++ test program to check if user entered is number or letter without using enumerations*/

//main.cpp

#include <iostream>
#include <iomanip>
#include <string>
using namespace std;
int main()
{
   /*without using enumeration ,one can check if user input is letter or character*/
   /*enum letters { A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z} ;
   enum numbers {zero, one, two, three, four, five, six, seven, eight, nine} ;
   numbers Numbers; //declare a variable of this enumerated type
   letters Letters;*/

   const string labeling[] = {"letter", "number"}; //array of messages;
   int x;
   //read value of integer from user
   //In this case, you can enter letter or character.
   //By using cin.fail() that results true if user input is integer
   //otherwise results false for otherthan integer value
   cout << "insert capital letters A-Z or zero-nine : ";
   cin >> x;

   /*Using fail method on cin operator
   we can check if user input value is integer or not
   If cin.fail is true then the user input is letter
   otherwise it is number*/
   if(cin.fail())
       cout << labeling[0]<<endl;
   else
       cout << labeling[1]<<endl;
  

   system("pause");
   return 0;
}

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Sample Output:

Run1:

insert capital letters A-Z or zero-nine : 1
number

Run2:

insert capital letters A-Z or zero-nine : A
letter