我试图使用std::random_device
生成随机数,但是每次运行程序时它们都是相同的。我使用在线IDE尝试了相同的代码,并且按预期运行。根据answer here,这是Cygwin和MSYS2中的错误。
如何升级MSYS2? 我尝试在其终端中运行命令pacman -Syu
和pacman -Su
,但出现错误:
MSYS ~ $ pacman -Syuu error: mingw32: key
"4A6129F4E4B84AE46ED7F635628F528CF3053E04" is unknown error: key
"4A6129F4E4B84AE46ED7F635628F528CF3053E04" could not be looked up
remotely error: mingw64: key
"4A6129F4E4B84AE46ED7F635628F528CF3053E04" is unknown error: key
"4A6129F4E4B84AE46ED7F635628F528CF3053E04" could not be looked up
remotely error: msys: key "4A6129F4E4B84AE46ED7F635628F528CF3053E04"
is unknown error: key "4A6129F4E4B84AE46ED7F635628F528CF3053E04" could
not be looked up remotely :: Synchronizing package databases...
mingw32 472.5 KiB 305K/s 00:02
[#####################] 100% mingw32.sig 438.0 B
0.00B/s 00:00 [#####################] 100% error: mingw32: key "4A6129F4E4B84AE46ED7F635628F528CF3053E04" is unknown error: key
"4A6129F4E4B84AE46ED7F635628F528CF3053E04" could not be looked up
remotely error: failed to update mingw32 (invalid or corrupted
database (PGP signature)) mingw64 475.0 KiB 346K/s
00:01 [#####################] 100% mingw64.sig 438.0 B
0.00B/s 00:00 [#####################] 100% error: mingw64: key "4A6129F4E4B84AE46ED7F635628F528CF3053E04" is unknown error: key
"4A6129F4E4B84AE46ED7F635628F528CF3053E04" could not be looked up
remotely error: failed to update mingw64 (invalid or corrupted
database (PGP signature)) msys 189.8 KiB 164K/s
00:01 [#####################] 100% msys.sig 438.0 B
0.00B/s 00:00 [#####################] 100% error: msys: key "4A6129F4E4B84AE46ED7F635628F528CF3053E04" is unknown error: key
"4A6129F4E4B84AE46ED7F635628F528CF3053E04" could not be looked up
remotely error: failed to update msys (invalid or corrupted database
(PGP signature)) error: failed to synchronize all databases
是否可以在Windows上生成随机数? 最佳答案
我通过引用this news page on MSYS2使它起作用。在其余步骤无效之前,我必须运行pacman -Sydd pacman
。
关于c++ - 为什么MSYS2的随机数都一样?,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/63201980/