Using functions isalpha : char functions « Data Types « C++ Tutorial

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C++ Tutorial » Data Types » char functions

2.22.2.Using functions isalpha

#include <iostream>

using std::cout;

using std::endl;



#include <cctype>

using std::isalnum;

using std::isalpha;

using std::isdigit;

using std::isxdigit;



int main()

{

   cout << "\nAccording to isalpha:\n"

      << ( isalpha( 'A' ) ? "A is a" : "A is not a" ) << " letter\n"

      << ( isalpha( 'b' ) ? "b is a" : "b is not a" ) << " letter\n"

      << ( isalpha( '&' ) ? "& is a" : "& is not a" ) << " letter\n"

      << ( isalpha( '4' ) ? "4 is a" : "4 is not a" ) << " letter\n";





   return 0;

}

According to isalpha:
A is a letter
b is a letter
& is not a letter
4 is not a letter

2.22.char functions
	2.22.1.	Using functions isdigit
	2.22.2.	Using functions isalpha
	2.22.3.	Using functions isalnum
	2.22.4.	Using functions isxdigit
	2.22.5.	islower
	2.22.6.	isupper
	2.22.7.	toupper and tolower
	2.22.8.	isspace
	2.22.9.	iscntrl
	2.22.10.	ispunct
	2.22.11.	isprint
	2.22.12.	isgraph
	2.22.13.	Using strrchr: index a character in a string

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