[[cHackAll]]

Empezado por sdiaz1983

...ME PUEDE EXPLICAR EL CODIGO PARA ENTENDERLO, EN PARTICULAR ESTA PARTE.

var Value: Cardinal; Code: Integer;
begin
Val(numero, Value, Code);
if LongBool(Code) then


MIL GRACIAS POR SU AYUDA

CLARO QUE SIII

Empezado por (F1) sobre la función

Converts a string to a numeric representation.

Delphi syntax:
procedure Val(S; var V; var Code: Integer);

Description
In Delphi code, Val converts the string value S to its numeric representation, as if it were read from a text file with Read.

S is a string-type expression; it must be a sequence of characters that form a signed real number.

V is an integer-type or real-type variable. If V is an integer-type variable, S must form a whole number.

Code is a variable of type Integer.

If the string is invalid, the index of the offending character is stored in Code; otherwise, Code is set to zero. For a null-terminated string, the error position returned in Code is one larger than the actual zero-based index of the character in error.

Val performs range checking differently depending upon the setting of the $R compiler directive and the type of the parameter V.

Resumen; Val intenta convertir S a un valor numerico. Si lo consigue retorna su valor (entero, real, con signo o no), en la variable V y retorna en Code 0 (cero), caso contrario (S no es reconocida) retorna el error correspondiente en Code (<> 0)

Saludos