Range Check Error Pascal
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Types Of Errors In Pascal Programming
and Games in Pascal Lazarus, the complete guide (only a few left) Search Advanced search « previous next » Print Pages: [1] pascal exit code 106 2 Author Topic: Range check error? (Read 8211 times) jacobite New member Posts: 10 Range check error? « on: November 06, 2013, 01:12:41 pm » This code which calculates the value of Pi works ok
Runtime Error 106 Pascal
at 10000 iterations:Code: [Select]program find_pi;
var
x, y: real;
i, inside: integer;
begin
randomize;
inside:= 0;
for i:= 1 to 10000 do begin
x:= random; y:= random;
// is the point inside the circle?
if (sqr(x - 0.5) + sqr(y - 0.5)) <= sqr(0.5) then
inc(inside)
end;
// calculate proportion of hits
writeln('Pi = ', pascal file handling 4*inside/i);
readln
end. But when I increase the number to 100000 I get the following error:QuoteError:range check error while evaluating constants « Last Edit: November 06, 2013, 01:45:15 pm by jacobite » Logged jacobite New member Posts: 10 Re: Range check error? « Reply #1 on: November 06, 2013, 03:28:21 pm » Ok, I figured it out. If I replace 'integer' by 'longint' I don't get the error. Logged howardpc Hero Member Posts: 1816 Re: Range check error? « Reply #2 on: November 06, 2013, 03:40:13 pm » Also note that the Random function returns an extended result.So x and y may well overflow (or not be pseudo-random) since they are declared as real (which is platform-dependent, but smaller than extended). Logged Leledumbo Hero Member Posts: 7368 Programming + Glam Metal + Tae Kwon Do = Me Re: Range check error? « Reply #3 on: November 06, 2013, 04:49:10 pm » In the default {$mode fpc}, integer maps to smallint, which is 16-bit signed integer. Please see the documentation for reference. Logged Follow this if you want me to answer: http://wiki.lazarus.freepascal.org/Lazarus_Faq#What_is_the_correct_way_to_ask_questions_in_the_forum.3Fhttp://pascalgeek.blogspot.comhttps://bitbucket.org/leledumbohttps://github.com/leledumboCode first, think later - Natural programmer B) CM630 Hero Member Posts: 669 Не съм сигурен, че те разбирам. Re: Range check error? « Reply #4 on: February 02, 2015, 02:
to get to Range Check Error location Messages sorted by: [ date ] [ thread ] [ subject ] [
Runtime Error 216
author ] On Saturday 02 October 2010 17:47:27 José Mejuto wrote:
How To Fix Runtime Error
> The assembly window in Lazarus is shown when no backtrace line is > available to runtime error 1004 point the cursor in, so open callstack "View -> Debug -> > Callstack" and you will see that there is no available backtrace, > maybe except the http://forum.lazarus.freepascal.org/index.php?topic=22553.0 fpc sources without debug information (you will see > some, usually 3, function names). The backtrace is often damaged when > memory corruption happends and usually calling a non initialized > object and not nil of course (as freed objects with heaptrc are > signaled with a magic number). Right. I finally found some errors. http://lists.freepascal.org/fpc-pascal/2010-October/026743.html One was a real error in my code, freeing an object twice, which happened seldom. For some reason Lazarus could not take me to its source line either. FPC output showed the place one level up in the call stack. Lazarus Debugger code causes one range error which can be fixed with a typecast. FPC showed the point clearly. Issue #0017537. TApplication.HandleException Range check error Stack trace: $000000000115AA93 line 1541 of ../debugger/gdbmidebugger.pp $0000000000786075 $00000000011678C7 line 3884 of ../debugger/gdbmidebugger.pp $0000000000E53D13 line 1819 of ../debugger/debugger.pp ... I think this is a Lazarus specific problem but I always get RunError(216) window when there is a range error. Sometimes I get a SIGSEGV window, too, while there is only a range error. Juha Previous message: [fpc-pascal] How to get to Range Check Error location Next message: [fpc-pascal] How to get to Range Check Error location Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] More information about the fpc-pascal mailing list
sysutilh.inc line 146 type ERangeError = class(EInterror) ; Inheritance ERangeError Range check error. runtime error | EInterror Integer operation error. | EExternal External Exception. | Exception Base class of all pascal exit code exceptions. | TObject Base class of all classes. Description ERangeError is raised by the Free Pascal runtime library if range checking is on, and a range check error occurs. See also EIntError Integer operation error. EDivByZero Division by zero error. EIntOverflow Integer overflow error. Documentation generated on: Nov 14 2015
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