If you really want to calculate this, have a look on the following: every complex number x can be writen as xa+ib sqrt(a2+b2)exp(iarg(x)), where arg(x)the angle of x in the complex plane. If the conversion doesn't succeed, the value of Code indicates the position where the conversion went wrong. It's ok, if pascal doesn't accept (-x)y, if x is positive and y non-integer, because this is no real number but a complex one. The conversion to enumerated exists only as of version 2.3.1 (or later) of the compiler. You may also want to take a look at a copy of the old Borland musuem page: Antique Software: Turbo Pascal v3.02.
It is a wonderfully well-laid out manual and you should have no problems using this to learn and get the most out of Turbo Pascal. The name is searched case insensitively.įor hexadecimal values, the prefix '0x' or 'x' (case insensitive) may be used as well. Get the Turbo Pascal 3.0 Manual for CP/M-80, CP/M-86 and PC-DOS/MS-DOS from. For enumerated values, the string must be the name of the enumerated value. The string S can contain a number in decimal, hexadecimal, binary or octal format, as described in the language reference. The string S is allowed to contain spaces in the beginning. If the conversion isn't successful, then the parameter Code contains the index of the character in S which prevented the conversion. Val converts the value represented in the string S to a numerical value or an enumerated value, and stores this value in the variable V, which can be of type Longint, Real and Byte or any enumerated type. Gi s Q c khai báo là bin vi kiu d liu ký t, X là bin vi kiu d liu xâu. Val Ĭalculate numerical/enumerated value of a string. 2.Trình bày thut toán tìm s ln nht ca 4 s nguyên dng a b c d.