goto

问题 I have a program in which i need to break out of a large bunch of nested for loops. So far, the way most people have been telling me to do it is to use an ugly goto in my code. Now, if i create a bunch of local stack (i think that's what they are called, if not, i mean just regular variables without using the new command) variables inside my loops and my program hits that one if statement that triggers the goto, will i encounter a memory leak due to my program exiting many loops improperly

问题 (Related question: Java compilers or JVM languages that support goto?) I have decompiled a jar (Legally, for debugging purposes) and want to recompile it. I've used both JAD and JD and both don't compile due to goto instructions E.g. goto _L1 ... L1: return true; Is there an easy way (or any way) to recompile it? (Except to manually refactor and remove the goto 's) 回答1: No, there isn't. In your case, neither JD nor JAD were able to decompile the class files correctly. The 'goto' statements

问题 I know, there are other questions about the goto statement introduced in PHP 5.3. But I couldn't find any decent answer in there, all were of the type "last resort", "xkcd", "evil", "bad", "EVIL!!!". But no valid example. Only statements that there aren't any uses. Or statements that there are some rare use cases (again, without examples). So, the question is: "What are the valid use cases of goto in PHP?". Answers for "Is goto evil?" are not welcome and will get downvoted. Thanks :) Or does

问题 I know, there are other questions about the goto statement introduced in PHP 5.3. But I couldn't find any decent answer in there, all were of the type "last resort", "xkcd", "evil", "bad", "EVIL!!!". But no valid example. Only statements that there aren't any uses. Or statements that there are some rare use cases (again, without examples). So, the question is: "What are the valid use cases of goto in PHP?". Answers for "Is goto evil?" are not welcome and will get downvoted. Thanks :) Or does

问题 This question may sound cliched, but I am in a situation here. I am trying to implement a finite state automaton to parse a certain string in C. As I started writing the code, I realised the code may be more readable if I used labels to mark the different states and use goto to jump from one state to another as the case comes. Using the standard breaks and flag variables is quite cumbersome in this case and hard to keep track of the state. What approach is better? More than anything else I am

问题 Just to get it straight in my head. Consider this example bit of Erlang code: test() -> receive {From, whatever} -> %% do something test(); {From, somethingelse} -> %% do something else test(); end. Isn't the test() call, just a goto? I ask this because in C we learned, if you do a function call, the return location is always put on the stack. I can't imagine this must be the case in Erlang here since this would result in a stackoverflow. In basic. We had 2 different ways of calling functions

问题 Today I found one interesting thing. I didn't know that one can't declare a variable after a goto label. Compiling the following code #include <stdio.h> int main() { int x = 5; goto JUMP; printf("x is : %d\n",x); JUMP: int a = 0; <=== giving me all sorts of error.. printf("%d",a); } gives errors like temp.c: In function ‘main’: temp.c:7: error: expected expression before ‘int’ temp.c:8: error: ‘a’ undeclared (first use in this function) temp.c:8: error: (Each undeclared identifier is reported

问题 Here's the link for the flowchart: http://i1146.photobucket.com/albums/o530/HTHVampire/C%20plus%20plus/Capture_zps5a6c3acf.jpg Here's the code for the flowchart as shown, just ignore the ambiguous statement in the flowchart. #include <iostream> using namespace std; int main() { //declare and initialize a variable int a = 0; //prompt user for a value cout << "please enter a value" << endl; cin >> a; again1: //enter a decision block if(a > 10) { if(a < 10) { again2: if(a < 100) { a = a - 3;

问题 Is there any harm for using a GOTO statement to jump down only ? Or are we totally safe ? What I mean by that is think this as my code, Some code ... ... GOTO whereToJump Some code ... ... whereToJump: Some code ... When whereToJump point is always below the GOTO statement, is there any security issues? 回答1: This is subject of one of the most famous computer science papers. Go To Statement Considered Harmful by Dijkstra. It essentially states that noone ever needs goto (I know there are a few

问题 I know I can't use Goto and I know Goto is not the answer. I've read similar questions, but I just can't figure out a way to solve my problem. So, I'm writing a program, in which you have to guess a number. This is an extract of the part I have problems: x = random.randint(0,100) #I want to put a label here y = int(raw_input("Guess the number between 1 and 100: ")) if isinstance( y, int ): while y != x: if y > x: y = int(raw_input("Wrong! Try a LOWER number: ")) else: y = int(raw_input("Wrong