Machine Problem

Design a program to input a character from the user  and check whether the given character is the alphabet or not.

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Program Listing
// char.cpp
// Author    : Mr. Jake R. Pomperada,BSCS,MAED-IT
// Date      : August 18, 2018  Saturday
// Location  : Bacolod City, Negros Occidental
// Website   :
// Email     :
#include <iostream>
using namespace std;
int main()
	char ch;
	char screen_display;
	cout << "\n\n";
	cout << "\tCharacter Checker in C++";
	cout << "\n\n";
	cout <<"\tGive a Character : ";
	cin >> ch;
	screen_display = toupper(ch);
	if((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z'))
      cout << "\n\n";
cout << "\tThe given character "<< screen_display << " is an alphabet.";
         cout << "\n\n";
        cout << "\tThe given character "
<< screen_display << " is not an alphabet.";
    cout << "\n\n";
cout << "\tEnd of Program";