c++ - What other values will generate error when given to std::minstd_rand::seed()? -

-

i'm on vc++11, far values generate errors, not on ideone.com

#include "stdafx.h" #include <iostream> #include <random> using namespace std;   int _tmain(int argc, _tchar* argv[]) //int main(int argc, char* argv[]) {     //print_seq(seeded_rand(0x7fffffff,10));     //cout << print_seq(seeded_rand(0xffffffff,10));     ////print_seq(seeded_rand(0,10));     //cout <<  print_seq(seeded_rand(-50000,10));     //cout <<  print_seq(seeded_rand(1,10));      minstd_rand r1;     minstd_rand0 r2;      r1.seed(0);     system("pause");      return 0; }

those values generated errors

0xfffffffe 0x7fffffff -2 0

what other values supposed generate abort() call ?

here sceenshot

visual c++ 11.0.61030.0 update 4

26.5.3.1/5 explicit linear_congruential_engine(result_type s = default_seed); effects: constructs linear_congruential_engine object. if c mod m 0 , s mod m 0, sets engine’s state 1, otherwise sets engine’s state s mod m.

for reason, msvc implementation chooses assert in debug build when "sets engine’s state 1" condition triggers; in release build, quietly seeds 1 instead of 0.

minstd_rand typedef linear_congruential_engine<uint_fast32_t, 48271, 0, 2147483647>. seed 0 modulo 2147483647 == 0x7fffffff meaningless (the generator produce sequence of zeros, if weren't adjusting seed 1 in case).


Comments

Post a Comment

Popular posts from this blog

database - VFP Grid + SQL server 2008 - grid not showing correctly -

-
i having problem, have grid called "gridbasica" , this: thisform.gridbase.recordsource = "sgviemp" sgviemp cursor made executing select sqlserver command sqlexec. when want modify registry, go form , the update there. so, when come form grid, grid isnt grid anymore, big white rectangle. reading around said: delete recordsource , asingt again. thisform.gridbase.recordsource = "" *--i sqlexe here thisform.gridbase.recordsource = "sgviemp" i , works, but, when click button modify again cursos updated modify form doesnt load fields did first time. could me out that? thanks in advance. --------------- edit ------------------ i have been doing recommended: lnselect = select(0) n = sqlexec(thisform.conexion,"select emp_ccodigo codigo, emp_cnombre 'nombre o razon social', emp_cnumrif 'r.i.f' sgviempr","sgviemp1") set echo on suspend select sgviemp zap in sgviemp *-- browse *--zaps correct
Read more

jquery - Set jPicker field to empty value -

-
im using jpicker color selector in form. have clear value set window/icon 'no color selected' state. i've tried following: $(':input[name="color"]').val(''); //access value directly. (does not affect jpicker) 2: $.jpicker.list[0].color.active.val('hex', '', this); //set color black , input value 000000, instead of empty string 3: $.jpicker.list[0].color.active.val(null, '', this); //does nothing none of 3 methods seems behave properly. in advance. this works me :) $.jpicker.list[0].color.active.val('v', null); here example: http://jsfiddle.net/3up7n/
Read more

.htaccess - htaccess convert request to clean url and add slash at the end of the url -

-
ok , searched more 4 days , more 20 posts here in stach or in websites without kind of success first here htaccess file rewriteengine on rewriterule ^([a-za-z0-9_]+)/?$ index.php?page=$1 [nc] rewriterule ^([a-za-z0-9_]+)\/([a-za-z0-9_]+)\/?$ index.php?page=$1&action=$2 [nc] i tried many codes 1 worked me can call request , works me www.example.com/pagename => www.example.com/index.php?page=pagename here questions , please provide me information "in detail" understand code well 1- how convert request automatically www.example.com/index.php?page=pagename www.example.com/pagename 2- if tried add slash @ end shows me page without images or styling mean www.example.com/pagename => works www.example.com/pagename/ => doesn't work that's :) for first part need 301 rule this: rewritecond %{the_request} /index\.php\?page=([^\s&]+) [nc] rewriterule ^ /%1? [r=301,l] for second part use absolute path in css, js, images files r
Read more