RE: [Dev-C++] Checking data type

[Ioannis V. <no...@ya...>]

Your code was not proper ANSI C++ too. Your code corrected and fully
portable:


#include <cstdlib>
#include <cctype>
#include <iostream>

int main()
{
    using namespace std;

	unsigned char number;
 
	cout << "\n\tInput number or letter: ";
	cin >> number;
 
     if(isalnum(number))
     {
      	cout << "\n\tIt is alnum" <<endl;
       
        if(isdigit(number))
   	      cout << "\tIt is digit" <<endl;
      
        else if(isalpha(number))
        {
          cout << "\tIt is alpha" << endl;
         
          if(islower(number))
            cout << "\tIt is lower"<< endl;
        }
     }
     
      
	cout << endl;

	system("PAUSE");
}



Ioannis

* Ioannis Vranos
* Programming pages: http://www.noicys.f2s.com
* Alternative URL: http://run.to/noicys


> -----Original Message-----
> From: dev...@li... 
> [mailto:dev...@li...] On Behalf 
> Of Exuss Draugas
> Sent: Saturday, December 22, 2001 10:11 AM
> To: Dev...@li...
> Subject: [Dev-C++] Checking data type
> 
> 
> 
> 
>  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 :)
> 
> 
> 
> --
> Nemokama el.pasto dezute - http://webmail.delfi.lt/
> 
> _______________________________________________
> Dev-cpp-users mailing list
> Dev...@li...
> https://lists.sourceforge.net/lists/listinfo/dev-cpp-users
>