多線程c ++將參數傳遞給函數

Question

我一直在嘗試將參數傳遞給線程函數，但一直未能通過。 我嘗試閱讀有關它的內容（將多個參數傳遞給線程函數 ），但是我仍然無法弄清楚。 這是我的代碼：

#include <iostream>
#include <thread>

using namespace std;

void func(int t)
{
    cout << t << endl;
}

int main()
{
    thread t1(func,4);
    t1.join();
    return 0;
}

通過執行以下操作，我在命令行中運行了它（我使用zsh以防萬一）：

g++ test.cpp
./a.out

但是我得到了這些錯誤：

thread_test.cpp:14:12: error: no matching constructor for initialization of 'std::__1::thread'
thread t1(func,4);
       ^  ~~~~~~
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/thread:379:9: note: candidate constructor template not viable: requires single argument '__f', but
  2 arguments were provided
thread::thread(_Fp __f)
        ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/thread:268:5: note: candidate constructor not viable: requires 1 argument, but 2 were provided
thread(const thread&);
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/thread:275:5: note: candidate constructor not viable: requires 0 arguments, but 2 were provided
thread() _NOEXCEPT : __t_(0) {}
^
1 error generated.

如果這很重要，則我將Mac與OSX 10.11.4一起使用

另外，要查看我使用的是哪個版本的c ++，我運行了以下命令並將其輸出：

g++ --version

配置為：--prefix = / Applications / Xcode.app / Contents / Developer / usr --with-gxx-include-dir = / Applications / Xcode.app / Contents / Developer / Platforms / MacOSX.platform / Developer / SDKs / MacOSX10.11.sdk / usr / include / c ++ / 4.2.1 Apple LLVM版本7.3.0（clang-703.0.31）目標：x86_64-apple-darwin15.4.0線程模型：posix InstalledDir：/Applications/Xcode.app/目錄/開發人員/工具鏈/XcodeDefault.xctoolchain/usr/bin

Answer 1

通過-std=c++11 ，它將起作用； 請參閱下面的成績單。 （在OS X上運行。）

nathanst% g++ t.cpp 
t.cpp:13:12: error: no matching constructor for initialization of 'std::__1::thread'
    thread t1(func,4);
           ^  ~~~~~~
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/thread:379:9: note: candidate constructor template not viable: requires single argument '__f', but 2 arguments were
      provided
thread::thread(_Fp __f)
        ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/thread:268:5: note: candidate constructor not viable: requires 1 argument, but 2 were provided
    thread(const thread&);
    ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/thread:275:5: note: candidate constructor not viable: requires 0 arguments, but 2 were provided
    thread() _NOEXCEPT : __t_(0) {}
    ^
1 error generated.
nathanst% g++ -std=c++11 t.cpp