Error Cannot Call Member Function Void Without Object
Contents |
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about
Cannot Call Member Function Without Object Qt
Stack Overflow the company Business Learn more about hiring developers or posting ads with cannot call member function without object c++ us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is arduino cannot call member function without object a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up cannot call member function without object up vote 15 down vote favorite This program
Cannot Call Member Function Without Object Inheritance
has the user input name/age pairs and then outputs them, using a class. Here is the code. #include "std_lib_facilities.h" class Name_pairs { public: bool test(); void read_names(); void read_ages(); void print(); private: vector
Cannot Call Member Function Without Object Singleton
} void Name_pairs::print() { for(int i = 0; i < names.size() && i < ages.size(); ++i) cout << names[i] << " , " << ages[i] << endl; } bool Name_pairs::test() { int i = 0; if(ages[i] == 0 || names[i] == "0") return false; else{ ++i; return true;} } int main() { cout << "Enter names and ages. Use 0 to cancel.\n"; while(Name_pairs::test()) { Name_pairs::read_names(); Name_pairs::read_ages(); } Name_pairs::print(); keep_window_open(); } However, in int main() when I'm trying to call the functions I get "cannot call 'whatever name is' function without object." I'm guessing this is because it's looking for something like variable.test or variable.read_names. How should I go about fixing this? c++ share|improve this question edited Sep 18 '15 at 19:28 Ziezi 3,19031228 asked Jul 14 '09 at 20:15 trikker 1,02852445 add a comment| 3 Answers 3 active oldest votes up vote 23 down vote accepted You need to instantiate an object in order to call its member functions. The member functions need an object to operate on; they can't just be used on their own. The main() function could, for example, look like this: int main() { Name_pairs np; cout << "Enter names and ages. Use 0 to cancel.\n"; while(np.test()) { np.read_names(); np.read_ages(); } np.print(); keep_window_open(); } sh
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss cannot declare member function static the workings and policies of this site About Us Learn more
C++ Call To Non-static Member Function Without An Object Argument
about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow c++ invalid use of member in static member function Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping http://stackoverflow.com/questions/1127738/cannot-call-member-function-without-object each other. Join them; it only takes a minute: Sign up Cannot call member function without object = C++ up vote 14 down vote favorite 2 I am brushing up again and I am getting an error: Cannot call member function without object. I am calling like: FxString text = table.GetEntry(obj->GetAlertTextID()); FxUChar outDescription1[ kCP_DEFAULT_STRING_LENGTH ]; IC_Utility::CP_StringToPString(text, &outDescription1[0] ); http://stackoverflow.com/questions/3304369/cannot-call-member-function-without-object-c The line: IC_Utility::CP_StringToPString(text, &outDescription1[0] ); is getting the error My function is: void IC_Utility::CP_StringToPString( FxString& inString, FxUChar *outString) { } I know it has to be something simple I am missing. c++ function compilation share|improve this question asked Jul 21 '10 at 22:23 jDOG 4015812 add a comment| 5 Answers 5 active oldest votes up vote 19 down vote accepted If you've written the CP_StringToPString function, you need to declare it static: static void IC_Utility::CP_StringToPString( FxString& inString, FxUChar *outString) Alternatively, if it's a function in third-party code, you need to declare an IC_Utility object to call it on: IC_Utility u; u.CP_StringToPString(text, &outDescription1[0] ); share|improve this answer answered Jul 21 '10 at 22:25 Tim Robinson 36.2k281104 add a comment| up vote 10 down vote Your method isn't static, and so it must be called from an instance (sort of like the error is saying). If your method doesn't require access to any other instance variables or methods, you probably just want to declare it static. Otherwise, you'll have to obtain the correct in
classes together: qapp.cpp: In static member function 'static bool QApp::eventFilter(void*)': qapp.cpp:32: error: cannot http://www.qtcentre.org/archive/index.php/t-35326.html call member function 'void QApp::mouseCoord(int, int, int, int, int)' without object main.cpp: int main(int argc, char *argv[]) { QApp a(argc, argv); Widget w; w.show(); QObject::connect(&a,SIGNAL(mouseCoords(int, https://bytes.com/topic/c/answers/686571-error-cannot-call-member-function-without-object int, int, int, int)), &w,SLOT(mouseCoords(int, int, int, int, int))); return a.exec(); } qapp.cpp: emit mouseCoord(get_raw_mouse_x_delta(i), get_raw_mouse_y_delta(i), // this is line 32... is_raw_mouse_button_pressed(i, 0), is_raw_mouse_button_pressed(i, 1), member function is_raw_mouse_button_pressed(i, 2)); I have searched the forum and found several issues quite like mine, but not enough to help me out. ChrisW6723rd October 2010, 04:54As the compiler error message says, you cannot call a member function, which requires a "this" pointer, from a static method that does not have a "this" cannot call member pointer to give. This might do it: QApp *app = qobject_cast
help? Post your question and get tips & solutions from a community of 418,505 IT Pros & Developers. It's quick & easy. Error - Cannot call member function without object... P: n/a Elliott Hello Everyone, I have a function in a header (KeyDialog.h) as such: void setKey(Key&); The function implementation is as such (KeyDialog.cpp): void KeyDialog::setKey(Key& k1) { Key::Key K1 = k1; //unimportant } And I'm calling this function from another cpp file (mainwindow.cpp) like so: KeyDialog::setKey(enter); When I compile I get the error: Cannot call member function 'void KeyDialog::setKey(Key&)' without object... This is probably stupidly simple, what am i missing? Aug 1 '07 #1 Post Reply Share this Question 2 Replies P: n/a Daniel T. Elliott