[Dev-C++] Checking data type

[Exuss D. <dra...@ce...>]

 Hi, All! :)

 How to check input data type from the console? For example, I need 
only number, and how to check that some letters wasn't entered?
 
 This code shows doesn't work for me, if I try to enter some number, 
it shows a zero in every condition. ://

#include <stdlib.h>
#include <ctype.h>
#include <iostream.h>

void main()
{

	int number;
	cout << "\n\tInput number or letter: ";
	cin >> number;
	cout << "\n\tIs alnum?: " << isalnum(number) << endl;
	cout << "\tIs digit?: " << isdigit(number) << endl;
	cout << "\tIs alpha?: " << isalpha(number) << endl;
	cout << "\tIs lower?: " << islower(number) << endl;
	cout << endl;
	system("PAUSE");
}

  Are there other way to check what was entered from console, digital 
number or text ???

 Thanx,

  Exuss :)



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