sairate
c34823a3bd
- 新增现代 C++ 教程的 Preface 章节，包括英文和中文版本 - 添加 C++ Primer 练习代码 - 新增 Learn C++ 教程的 C++ 开发简介章节 - 添加头文件解析文档 - 更新 mkdocs.yml，包含新教程的目录结构 - 修改项目设置，使用 Python 3.10环境
25 lines
739 B
C++
25 lines
739 B
C++
//
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// 7.4.futures.cpp
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// chapter 7 parallelism and concurrency
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// modern c++ tutorial
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//
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// created by changkun at changkun.de
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// https://github.com/changkun/modern-cpp-tutorial
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//
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#include <iostream>
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#include <thread>
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#include <future>
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int main() {
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// pack a lambda expression that returns 7 into a std::packaged_task
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std::packaged_task<int()> task([](){return 7;});
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// get the future of task
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std::future<int> result = task.get_future(); // run task in a thread
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std::thread(std::move(task)).detach();
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std::cout << "waiting...";
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result.wait(); // block until future has arrived
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// output result
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std::cout << "done!" << std:: endl << "future result is " << result.get() << std::endl;
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return 0;
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} |