mainwindow has not been declared
mainwindow has not been declared, mainwindow was not declared in this scope, mainwindow is not defined, does not match any declaration in mainwindow, mainwindow does not refer to a value, file mainwindow is not valid, identifier window has already been declared, main was not declared in this scope, class mainwindow has no member named, qmainwindow does not exist, the function is not implemented namedwindow, mainwindow does not name a type, ui_mainwindow is not defined, name mywindow is not defined, ui_mainwindow not found, class mainwindow : public qmainwindow, qmainwindow is not found, name qmainwindow is not defined
mainwindow has not been declared. There are any references about mainwindow has not been declared in here. you can look below.
mainwindow has not been declared
mainwindow was not declared in this scope
mainwindow is not defined
does not match any declaration in mainwindow
mainwindow does not refer to a value
file mainwindow is not valid
identifier window has already been declared
main was not declared in this scope
class mainwindow has no member named
qmainwindow does not exist
the function is not implemented namedwindow
mainwindow does not name a type
ui_mainwindow is not defined
name mywindow is not defined
ui_mainwindow not found
class mainwindow : public qmainwindow
qmainwindow is not found
name qmainwindow is not defined
mainwindow has not been declared, mainwindow was not declared in this scope, mainwindow is not defined, does not match any declaration in mainwindow, mainwindow does not refer to a value, file mainwindow is not valid, identifier window has already been declared, main was not declared in this scope, class mainwindow has no member named, qmainwindow does not exist, the function is not implemented namedwindow, mainwindow does not name a type, ui_mainwindow is not defined, name mywindow is not defined, ui_mainwindow not found, class mainwindow : public qmainwindow, qmainwindow is not found, name qmainwindow is not defined
