Java (Leer.class)

import java.io.*;

public class Leer

{

public static String dato ()

{

String x = "";

try

{

InputStreamReader isr = new InputStreamReader (System.in);

BufferedReader in = new BufferedReader (isr);

x = in.readLine ();

}

catch (IOException e)

{

System.err.print ("Error: " + e.getMessage ());

}

return x;

}

public static int datoInt ()

{

try

{

return Integer.parseInt (dato ());

}

catch (NumberFormatException e)

{

return 0;

}

}

public static float datoLong ()

{

try

{

return Long.parseLong (dato ());

}

catch (NumberFormatException e)

{

return 0l;

}

}

public static float datoFloat ()

{

try

{

return (new Float (dato ())).floatValue ();

}

catch (Exception e)

{

return Float.NaN;

}

}

public static double datoDouble ()

{

try

{

return (new Double (dato ())).doubleValue ();

}

catch (Exception e)

{

return Double.NaN;

}

}

...