C++ - std::strstream::rdbuf - Devuelve un puntero alstd ...

Unhandled Exception Error in code

Hey all, I've been learning to program for a few months now and I've been working on a program to manage student data. Here's the code:
#include  #include  #include  #include  #include  using namespace std; class Student { private: char name[20]; string course; int section; int grade; public: void calcgrade(); void getData(); void showData(); }; void Student::calcgrade() { if (grade >= 90) grade = 'A'; else if (grade >= 80) grade = 'B'; else if (grade >= 70) grade = 'C'; else if (grade >= 60) grade = 'D'; else grade = 'F'; } void Student::getData() { cout << "Enter the name of the student: "; cin.ignore(); getline(cin, name); cout << "Enter the course: "; cin >> course; cout << "Enter the section: "; cin >> section; cout << "Enter the grade received: "; cin >> grade; calcgrade(); } void Student::showData() { cout << ".......Student Information......" << endl; cout << "Student Name: " << name << endl; cout << "Course: " << course << endl; cout << "Section: " << section << endl; cout << "Grade: " << grade << endl; cout << endl; } void addData() { Student st; ofstream fout; fout.open("Student.data", ios::binary | ios::out | ios::app); st.getData(); fout.write((char*)& st, sizeof(st)); fout.close(); cout << "Data Successfully Saved to File." << endl; } void displayData() { Student st; ifstream file; file.open("Student.data", ios::in | ios::binary); if (file.is_open()) { while (file.read((char*)& st, sizeof(st))) { st.showData(); } cout << "Finished Reading Data From File." << endl; } else { cout << "Unable to open file" << endl; } file.close(); } void searchData() { Student st; ifstream file; file.open("Student.data", ios::in | ios::binary); string search; cout << "Please enter the first name of a student to search for: "; cin >> search; bool isFound = 0; while (file.read((char*)& st, sizeof(st))) { string temp = " "; getline(file, temp); for (int i = 0; i < search.size(); i++) { if (temp[i] == search[i]) isFound = 1; else { isFound = 0; break; } } if (isFound) { cout << "The name " << search << " was found in the database." << endl; break; } } if (file.read((char*)& st, sizeof(st)) && (!isFound)) { cout << "Name not found." << endl; } file.close(); } void modifyData() { Student st; string stname; bool isFound = 0; int pos; fstream file; file.open("Student.data", ios::in | ios::out | ios::binary); cout << "Enter the name of a student whose data you want to modify: "; cin >> stname; while (file.read((char*)& st, sizeof(st))) { string temp = " "; getline(file, temp); for (int i = 0; i < stname.size(); i++) { if (temp[i] == stname[i]) isFound = 1; else { isFound = 0; break; } } if (isFound) { pos = file.tellg(); cout << "Current Data" << endl; st.showData(); cout << "Modified Data" << endl; st.getData(); file.seekg(pos - sizeof(st)); file.write((char*)& st, sizeof(st)); } } if (file.read((char*)& st, sizeof(st)) && (!isFound)) { cout << "Name not found." << endl; } file.close(); } void deleteData() { Student st; string stname; bool isFound = 0; ifstream file; ofstream fout; file.open("Student.data", ios::in | ios::binary); fout.open("Temporary.data", ios::out | ios::app | ios::binary); cout << "Enter the name of a student whose data you want to delete: "; cin >> stname; while (file.read((char*)& st, sizeof(st))) { string temp = " "; getline(file, temp); for (int i = 0; i < stname.size(); i++) { if (temp[i] == stname[i]) isFound = 1; else { isFound = 0; break; } } if (isFound) { cout << "Bleh" << endl; fout.write((char*)& st, sizeof(st)); } } if (file.read((char*)& st, sizeof(st)) && (!isFound)) { cout << "Name not found." << endl; } fout.close(); file.close(); remove("Student.data"); rename("Temporary.data", "Student.data"); } void printData() { ifstream file; file.open("Student.data", ios::in | ios::binary); if (file.is_open()) { cout << file.rdbuf(); } file.close(); } int main() { int num; do { cout << "...............STUDENT MANAGEMENT SYSTEM..............\n"; cout << "======================================== ==============\n"; cout << "0. Close Program. " << endl; cout << "1. Add Data. " << endl; cout << "2. List Data. " << endl; cout << "3. Modify Data. " << endl; cout << "4. Search For Data. " << endl; cout << "5. Print Data. " << endl; cout << "6. Delete Data. " << endl; cout << "Choose an option: "; cin >> num; if (num == 1) { addData(); } else if (num == 2) { displayData(); } else if (num == 3) { modifyData(); } else if (num == 4) { searchData(); } else if (num == 5) { printData(); } else if (num == 6) { deleteData(); } } while (num > 0); return 0; } 
Ideally, when the program runs, the user chooses an option, with different function calls depending on the number entered. The Add Data option works fine, but when choosing others, such as List Data or Search Data, I run into an error: Unhandled exception thrown: read access violation. _Pnext was 0x10A6A04.
Code in xmemory:
 inline void _Container_base12::_Orphan_all() noexcept { #if _ITERATOR_DEBUG_LEVEL == 2 if (_Myproxy != nullptr) { // proxy allocated, drain it _Lockit _Lock(_LOCK_DEBUG); for (_Iterator_base12** _Pnext = &_Myproxy->_Myfirstiter; *_Pnext != nullptr; *_Pnext = (*_Pnext)->_Mynextiter) { (*_Pnext)->_Myproxy = nullptr; } _Myproxy->_Myfirstiter = nullptr; } 
The error occurs after != nullptr. Because there are no obvious errors in the code, I'd like a little help in picking out what I've done wrong.
submitted by nottooavidprogrammer to cpp_questions [link] [comments]

Wine 1.9.22 Released

The Wine development release 1.9.22 is now available.
 
https://www.winehq.org/announce/1.9.22
 
What's new in this release (see below for details):
 
 
The source is available from the following locations:
 
http://dl.winehq.org/wine/source/1.9/wine-1.9.22.tar.bz2
http://mirrors.ibiblio.org/wine/source/1.9/wine-1.9.22.tar.bz2
 
Binary packages for various distributions will be available from:
http://www.winehq.org/download
 
You will find documentation on
http://www.winehq.org/documentation
 
You can also get the current source directly from the git repository.
Check http://www.winehq.org/git for details.
 
Wine is available thanks to the work of many people.
 
See the file AUTHORS in the distribution for the complete list.
 
 
Bugs fixed in 1.9.22 (total 25):
 
11910 Multiple games need [email protected]@[email protected]@Z (Tron 2.0, NOLF2, Schizm 2)
16925 Star Trek: Borg does not run, needs [email protected]@[email protected]@Z
20569 Winamp's next page in the shoutcast radio/tv list doesn't respond
22671 Gestan crashes due to unimplemented [email protected]@[email protected]@Z
24519 Fractal Time!: cannot select an area in the generated image to zoom in
26994 Microsoft reader crashes due to unimpl [email protected]@@[email protected]@XZ
27553 Reservoir Dogs: no videos and black menu right after starting
29174 L2German.net: Lineage II installer crashes
29412 Right click on system tray icon not work
31338 Max Payne 2: The Fall of Max Payne (Steam) shows white screen and nothing else
32672 Rainbow Six: Only the sky is rendered
35025 Max Payne 2 Demo: checkboxes in options dialog have missing window styles
35281 KCleaner hangs up in system tray
35452 Warhammer 40,000: Dawn of War II (Steam) crashes on startup, reporting 'Failed to verify content catalog integrity'
35630 New ReactOS shell crashes on unimplemented function shell32.dll.723 a.k.a. SHCreateSessionKey
36205 TrySim v5.0 demo doesn't exit cleanly (crashes/hangs on exit)
36690 Rockman 7FC has issues with Shade Man Easter Egg
37410 Might & Magic Heroes IV crashes on startup
39364 LFS.exe (Live for Speed) crash on copy/paste (Ctrl+C) operation on chat history
41449 Power DVD 15 (Cyberlink) needs unimplemented function SHELL32.dll.SHRemoveLocalizedName
41492 Failure to compile: redefinition of typedef ‘EVENT_FILTER_DESCRIPTOR’
41565 WMI error in object Win32_ComputerSystemProduct, property UUID
41570 Xenia emulator needs unimplemented function api-ms-win-core-rtlsupport-l1-1.RtlLookupFunctionEntry called in 64-bit code
41572 Windows API crash (GetTimeZoneInformationForYear)
41575 Copy/Cut and paste do not work as of wine 1.9.21
submitted by catulirdit to linux_gaming [link] [comments]

Wine 1.9.22 Released

The Wine development release 1.9.22 is now available.
 
https://www.winehq.org/announce/1.9.22
 
What's new in this release (see below for details):
 
 
The source is available from the following locations:
 
http://dl.winehq.org/wine/source/1.9/wine-1.9.22.tar.bz2
http://mirrors.ibiblio.org/wine/source/1.9/wine-1.9.22.tar.bz2
 
Binary packages for various distributions will be available from:
http://www.winehq.org/download
 
You will find documentation on
http://www.winehq.org/documentation
 
You can also get the current source directly from the git repository.
Check http://www.winehq.org/git for details.
 
Wine is available thanks to the work of many people.
 
See the file AUTHORS in the distribution for the complete list.
 
 
Bugs fixed in 1.9.22 (total 25):
 
11910 Multiple games need [email protected]@[email protected]@Z (Tron 2.0, NOLF2, Schizm 2)
16925 Star Trek: Borg does not run, needs [email protected]@[email protected]@Z
20569 Winamp's next page in the shoutcast radio/tv list doesn't respond
22671 Gestan crashes due to unimplemented [email protected]@[email protected]@Z
24519 Fractal Time!: cannot select an area in the generated image to zoom in
26994 Microsoft reader crashes due to unimpl [email protected]@@[email protected]@XZ
27553 Reservoir Dogs: no videos and black menu right after starting
29174 L2German.net: Lineage II installer crashes
29412 Right click on system tray icon not work
31338 Max Payne 2: The Fall of Max Payne (Steam) shows white screen and nothing else
32672 Rainbow Six: Only the sky is rendered
35025 Max Payne 2 Demo: checkboxes in options dialog have missing window styles
35281 KCleaner hangs up in system tray
35452 Warhammer 40,000: Dawn of War II (Steam) crashes on startup, reporting 'Failed to verify content catalog integrity'
35630 New ReactOS shell crashes on unimplemented function shell32.dll.723 a.k.a. SHCreateSessionKey
36205 TrySim v5.0 demo doesn't exit cleanly (crashes/hangs on exit)
36690 Rockman 7FC has issues with Shade Man Easter Egg
37410 Might & Magic Heroes IV crashes on startup
39364 LFS.exe (Live for Speed) crash on copy/paste (Ctrl+C) operation on chat history
41449 Power DVD 15 (Cyberlink) needs unimplemented function SHELL32.dll.SHRemoveLocalizedName
41492 Failure to compile: redefinition of typedef ‘EVENT_FILTER_DESCRIPTOR’
41565 WMI error in object Win32_ComputerSystemProduct, property UUID
41570 Xenia emulator needs unimplemented function api-ms-win-core-rtlsupport-l1-1.RtlLookupFunctionEntry called in 64-bit code
41572 Windows API crash (GetTimeZoneInformationForYear)
41575 Copy/Cut and paste do not work as of wine 1.9.21
submitted by catulirdit to wine_gaming [link] [comments]

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