goto

问题 From the VBA help file: GoTo Statement Branches unconditionally to a specified line within a procedure. Syntax GoTo _ line _ The required line argument can be any line label or line number. Remarks GoTo can branch only to lines within the procedure where it appears. My question is, how can I jump to a line number using GoTo ? (I know how to jump to a label.) (Note: I'm asking this for curiosity's sake. I have no intention of actually using GoTo this way.) 回答1: I understand your dislike of the

问题 I have read that GOTO is bad, but how do I avoid it? I don't know how to program without GOTO . In BASIC I used GOTO for everything. What should I use instead in C and C++? I used GOTO in BASIC like this: MainLoop: INPUT string$ IF string$ = "game" THEN GOTO game ENDIF 回答1: Usually loops like for , while and do while and functions have more or less disposed the need of using GOTO. Learn about using those and after a few examples you won't think about goto anymore. :) 回答2: Consider the

问题 I have read that GOTO is bad, but how do I avoid it? I don't know how to program without GOTO . In BASIC I used GOTO for everything. What should I use instead in C and C++? I used GOTO in BASIC like this: MainLoop: INPUT string$ IF string$ = "game" THEN GOTO game ENDIF 回答1: Usually loops like for , while and do while and functions have more or less disposed the need of using GOTO. Learn about using those and after a few examples you won't think about goto anymore. :) 回答2: Consider the

问题 I have read that GOTO is bad, but how do I avoid it? I don't know how to program without GOTO . In BASIC I used GOTO for everything. What should I use instead in C and C++? I used GOTO in BASIC like this: MainLoop: INPUT string$ IF string$ = "game" THEN GOTO game ENDIF 回答1: Usually loops like for , while and do while and functions have more or less disposed the need of using GOTO. Learn about using those and after a few examples you won't think about goto anymore. :) 回答2: Consider the

问题 My teacher recently talked about the statement 'GOTO', to be used in Management Studio, but I didn't quite understand it at first. He stated that GOTO is being used to jump to different pieces of code, with the help of a label I can name by myself. This is the code he used to represent his example: select 'first' goto jump select 'second' jump: select 'third' When I execute the code, sure enough, it prints 'first' and 'third'. My question now is what was the select 'second' doing there in the

问题 Regular goto in C++ respects object lifetime - that is using goto to jump out of a block will run the destructors for the appropriate local variables. start: NonTrivial object; if (again()) goto start; // will call object.~NonTrivial() Is the same true when using the Labels as Values extension? start: NonTrivial object; goto *(again() ? &&start : &&end); end: GCC happily accepts this code, but seems to ignore any effect goto might have on object 's lifetime. clang complains. Look for calls to

问题 My problem: I set a VAR with prompt and three IF to let choice. Fourth choice doesn't work. I would like that if i push enter without type anything, it goes back to :MOSTRA. Actually leaving it blank and typing enter on the keyboard it give back GOTO WAS UNEXPECTED and close CMD. Where am i wrong? :MOSTRA ECHO Make your choice. ECHO. ECHO A) Ok ECHO B) Ko ECHO Esci SET /P choose=Scelta: if /I %choose%==A GOTO OK if /I %choose%==B GOTO KO if /I %choose%==esci GOTO FINE if /I %choose%=="" GOTO

问题 I'm working with excel vba since 3 month now and this is (after one course of programming in university) my first real contact to programming. Please take that to account. I built up a userform with many textboxes. Therefore I wrote a makro which first checks if the user put in a value in every textbox so that afterwards the procedure begins. If there is not a value in every textbox I want the exit sub after msgbox the user to fill again every textbox. Quiet simple, right? I thought the best

问题 I was making a "concatenating iterator", i.e. an iterator that would iterate over the int s in an int** . Its constructor needs: An array of T** , representing the beginning of each sub-array. An array of T** , representing the end of each sub-array. Lo and behold, I ran across a situation where goto seemed to be appropriate. But something within me screamed "NO!!" so I thought I'd come here and ask: Should I try avoid goto situations like this? (Does it improve the readability if I do?)

问题 hello i got a batch file, something like this: if %day%==monday, tuesday, wednesday, thursday, friday ( goto yes ) else ( goto no ) Now i know the first line won't work. What i actually want to happen: It automatticly checks which day it is. If it is Monday to Friday, it has to go to 'yes', otherwise (saturday/sunday) to 'no'. How to do this? 回答1: I ran across this online. Tested, and it works. Returns the day as an integer, which you can still work with. @For /F "tokens=2,3,4 delims=/ " %%A