online ide c++

                                    Best Site With auto compile :
https://godbolt.org/z/nEo4j7

                                    This two are good C++ compilers:
https://www.onlinegdb.com/online_c++_compiler
https://www.programiz.com/cpp-programming/online-compiler/

                                    repl.it

                                    IDE Shortcuts:
New file : Ctrl-M
Run Code : F9
Debug Code : F8
Save Project : Ctrl-S
Beautify Code : Ctrl-B
Settings Menu : Ctrl-Shift-S
Info : Ctrl-I

Editor Shortcuts:
showSettingsMenu : Ctrl-,
goToNextError : Alt-E
goToPreviousError : Alt-Shift-E
selectall : Ctrl-A
gotoline : Ctrl-L
fold : Alt-L|Ctrl-F1
unfold : Alt-Shift-L|Ctrl-Shift-F1
toggleFoldWidget : F2
toggleParentFoldWidget : Alt-F2
foldOther : Alt-0
unfoldall : Alt-Shift-0
findnext : Ctrl-K
findprevious : Ctrl-Shift-K
selectOrFindNext : Alt-K
selectOrFindPrevious : Alt-Shift-K
find : Ctrl-F
overwrite : Insert
selecttostart : Ctrl-Shift-Home
gotostart : Ctrl-Home
selectup : Shift-Up
golineup : Up
selecttoend : Ctrl-Shift-End
gotoend : Ctrl-End
selectdown : Shift-Down
golinedown : Down
selectwordleft : Ctrl-Shift-Left
gotowordleft : Ctrl-Left
selecttolinestart : Alt-Shift-Left
gotolinestart : Alt-Left|Home
selectleft : Shift-Left
gotoleft : Left
selectwordright : Ctrl-Shift-Right
gotowordright : Ctrl-Right
selecttolineend : Alt-Shift-Right
gotolineend : Alt-Right|End
selectright : Shift-Right
gotoright : Right
selectpagedown : Shift-Pagedown
gotopagedown : Pagedown
selectpageup : Shift-Pageup
gotopageup : Pageup
scrollup : Ctrl-Up
scrolldown : Ctrl-Down
selectlinestart : Shift-Home
selectlineend : Shift-End
togglerecording : Ctrl-Alt-E
replaymacro : Ctrl-Shift-E
jumptomatching : Ctrl-P
selecttomatching : Ctrl-Shift-P
expandToMatching : Ctrl-Shift-M
removeline : Ctrl-D
duplicateSelection : Ctrl-Shift-D
sortlines : Ctrl-Alt-S
togglecomment : Ctrl-/
toggleBlockComment : Ctrl-Shift-/
modifyNumberUp : Ctrl-Shift-Up
modifyNumberDown : Ctrl-Shift-Down
replace : Ctrl-H
undo : Ctrl-Z
redo : Ctrl-Shift-Z|Ctrl-Y
copylinesup : Alt-Shift-Up
movelinesup : Alt-Up
copylinesdown : Alt-Shift-Down
movelinesdown : Alt-Down
del : Delete
backspace : Shift-Backspace|Backspace
cut_or_delete : Shift-Delete
removetolinestart : Alt-Backspace
removetolineend : Alt-Delete
removewordleft : Ctrl-Backspace
removewordright : Ctrl-Delete
outdent : Shift-Tab
indent : Tab
blockoutdent : Ctrl-[
blockindent : Ctrl-]
transposeletters : Ctrl-T
touppercase : Ctrl-U
tolowercase : Ctrl-Shift-U
expandtoline : Ctrl-Shift-L
addCursorAbove : Ctrl-Alt-Up
addCursorBelow : Ctrl-Alt-Down
addCursorAboveSkipCurrent : Ctrl-Alt-Shift-Up
addCursorBelowSkipCurrent : Ctrl-Alt-Shift-Down
selectMoreBefore : Ctrl-Alt-Left
selectMoreAfter : Ctrl-Alt-Right
selectNextBefore : Ctrl-Alt-Shift-Left
selectNextAfter : Ctrl-Alt-Shift-Right
splitIntoLines : Ctrl-Alt-L
alignCursors : Ctrl-Alt-A
findAll : Ctrl-Alt-K
showKeyboardShortcuts : Ctrl-Alt-H
          

                                    template < class T, class Alloc = allocator<T> > class vector; // generic template