fault

问题 Can someone please tell me, what causes the segementation fault in my C - code? I am trying to save a struct into a file, and calling it afterwards, following this guide. I don't see anything assigned wrongly, so I'm happy to learn what's my mistake by someone more experienced. Here is my code, simplified: int main(int argc, char **argv) { char *key = (argc > 4) ? argv[4]: 0; if(0==strcmp(key, "write")){ struct MyStruct s; FILE *myoutfile; myoutfile = fopen("file.dat","w") if (myoutfile ==

问题 I have asked reference question in this link.I got answer using NSMangedObjectID.Now I have used below function to get Component entity from its componentID.As in the API response of SyncSurveyWebReadings,I only get componentId,I need to fetch Component entity & set as relationship.Now time taking issue is not there.But may be relationship is not getting set.When I print the relationship object I got, Optional<Array<SurveyReadingWeb>> ▿ some : 1 element - 0 : <GazSurvey_Dev.SurveyReadingWeb:

问题 I have asked reference question in this link.I got answer using NSMangedObjectID.Now I have used below function to get Component entity from its componentID.As in the API response of SyncSurveyWebReadings,I only get componentId,I need to fetch Component entity & set as relationship.Now time taking issue is not there.But may be relationship is not getting set.When I print the relationship object I got, Optional<Array<SurveyReadingWeb>> ▿ some : 1 element - 0 : <GazSurvey_Dev.SurveyReadingWeb:

问题 I have asked reference question in this link.I got answer using NSMangedObjectID.Now I have used below function to get Component entity from its componentID.As in the API response of SyncSurveyWebReadings,I only get componentId,I need to fetch Component entity & set as relationship.Now time taking issue is not there.But may be relationship is not getting set.When I print the relationship object I got, Optional<Array<SurveyReadingWeb>> ▿ some : 1 element - 0 : <GazSurvey_Dev.SurveyReadingWeb:

问题 I was wondering if anyone knows how to plot a sine wave with let's say amplitude of 0.1 as a start and then continuing on as usual. Until at one point, the amplitude change to 1.0. Like a sudden surge of change in amplitude. It's like I was an oscillatory system that was stable, and becoming unstable at one point. The plot that I am expecting is as follow: Regards, Anis 回答1: You could plot a piece-wise sin function where the second part defines the surge happening and you can change the

问题 I have a txt file where I just want to get lines bigger than 12 characters. Than these lines are inserted in a variable called graph of type graph_node. txt file: 1,"execCode(workStation,root)","OR",0 2,"RULE 4 (Trojan horse installation)","AND",0 3,"accessFile(workStation,write,'/usr/local/share')","OR",0 4,"RULE 16 (NFS semantics)","AND",0 5,"accessFile(fileServer,write,'/export')","OR",0 6,"RULE 10 (execCode implies file access)","AND",0 7,"canAccessFile(fileServer,root,write,'/export')",

问题 I mistakenly created a group of objects on a background thread, which created a new managedObjectContext in which the objects were saved. This resulted in numerous "Core Data could not fulfill a fault" crashes in my live app. Please note - I am not trying to delete these objects - it is a problem with the way they were created, when I try to save them again afterwards in the app delegate (main) context on the main thread. The thing that is confusing is that I am seeing this error for other

问题 Have a bit of trouble tracking down the cause of this. Here is the code bit: #include <time.h> time_t now; struct tm *mytime; char yyyy[5]; char mm[3]; char dd[3]; char mname[10]; if(time(&now)!=(time_t)(-1)) { mytime=localtime(&now); strftime(yyyy, sizeof(yyyy), "%Y", mytime); strftime(mm, sizeof(mm), "%m", mytime); strftime(dd, sizeof(dd), "%d", mytime); strftime(mname, sizeof(mname), "%B", mytime); } It crashes on localtime line: Segmentation fault (core dumped) Any ideas? 回答1: The sample

问题 I have this following very simple code, that works perfectly: void func(int *tab) { return; } int main() { int maxsize = 999*999; int tabs[maxsize][6]; return 0; } However, when I modify the main such that I obtain this, it crashes. int main() { int maxsize = 999*999; int tabs[maxsize][6]; func(tabs[0]); return 0; } Do you have any idea why? I would really appreciate your help on this, thank you ^^ 回答1: So although the standard does not talk about stacks most modern implementations will put

问题 We get "CoreData could not fulfill a fault" every once in a while. We have read through the Apple documentation but are unclear on what is allowed to be retained. We have been very careful about creating one context per thread, etc. However, one thing our app is doing is we are retaining NSManagedObjects on our UIViewControllers (usually via a NSArray or NSDictionary). I'm guessing what's going on is the object relationships are changing and we are not handling the appropriate notification.