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  1. #include <iostream>  // input/output handling
  2. #include <cctype>   // character type functions
  3.  
  4. using namespace std;
  5.  
  6. int main() {
  7. 	char ch;
  8. 	cout << "Enter a character: ";
  9. 	cin >> ch; 
  10. 	cout << "The toupper(" << ch << ") = " << (char)toupper(ch) << endl;
  11. 	cout << "The tolower(" << ch << ") = " << (char)tolower(ch) << endl;
  12. 	if (isdigit(ch))
  13. 		cout << "'" << ch <<"' is a digit!\n";
  14. 	else
  15. 		cout << "'" << ch <<"' is NOT a digit!\n";
  16. }
  17.  
Success #stdin #stdout 0s 3144KB
comments (?)
stdin 
5
stdout 
Enter a character: The toupper(5) = 5
The tolower(5) = 5
'5' is a digit!
https://ideone.com/lP7Txr
character function
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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