/home/idiao123/ceshi/mainwindow.h:17: error: 'nullptr' was not declared in this scope
explicit MainWindow(QWidget *parent = nullptr);
^
/home/idiao123/ceshi/main.cpp:-1: In function 'int main(int, char**)':
/home/idiao123/ceshi/main.cpp:7: error: call to 'MainWindow::MainWindow(QWidget*)' uses the default argument for parameter 1, which is not yet defined
MainWindow w;
^
/home/idiao123/ceshi/mainwindow.cpp:45: error: no matching function for call to 'QTimer::singleShot(int&, MainWindow* const, MainWindow::playBuzzer(int, int)::<lambda()>)'
/home/idiao123/ceshi/mainwindow.cpp:45: error: no matching function for call to 'QTimer::singleShot(int&, MainWindow*, void (*)())'
QTimer::singleShot(duration, this, &MainWindow::stopBuzzer);
^
Starting /home/idiao123/build-ceshi-Desktop-Debug/AccountBook...
QMetaObject::connectSlotsByName: No matching signal for on_editButton_clicked()
open pwm_buzzer device: No such file or directory
/home/idiao123/build-ceshi-Desktop-Debug/AccountBook exited with code 1
/home/idiao123/ceshi/mainwindow.h:18: error: 'nullptr' was not declared in this scope
/opt/FriendlyARM/toolschain/4.5.1/arm-none-linux-gnueabi/include/c++/4.5.1/bits/c++0x_warning.h:31: error: #error This file requires compiler and library support for the upcoming ISO C++ standard, C++0x. This support is currently experimental, and must be enabled with the -std=c++0x or -std=gnu++0x compiler options.
/home/idiao123/ceshi/buzzer.cpp:26: error: 'thread' is not a member of 'std'
/home/idiao123/ceshi/buzzer.cpp:27: error: 'std::this_thread' has not been declared
/home/idiao123/ceshi/buzzer.cpp:27: error: 'std::chrono' has not been declared
/home/idiao123/build-ceshi-Unnamed-Debug/moc_mainwindow.cpp:56: error: undefined reference to `MainWindow::stopBuzzer()'
:-1: error: collect2: ld returned 1 exit status
/home/idiao123/ceshi/buzzer.cpp:12: error: redefinition of 'int fd'
/home/idiao123/ceshi/buzzer.h:14: error: 'int fd' previously defined here
/home/idiao123/ceshi/buzzer.cpp:-1: In function 'void open_buzzer()':
/home/idiao123/ceshi/buzzer.cpp:15: error: redefinition of 'void open_buzzer()'
/home/idiao123/ceshi/buzzer.h:17: error: 'void open_buzzer()' previously defined here
/home/idiao123/ceshi/buzzer.cpp:-1: In function 'void close_buzzer()':
/home/idiao123/ceshi/buzzer.cpp:40: error: redefinition of 'void close_buzzer()'
/home/idiao123/ceshi/buzzer.h:40: error: 'void close_buzzer()' previously defined here
