#include <bits/stdc++.h>
#include <thread>
#include <mutex>
#include <condition_variable>

using namespace std;

void countdown(int count) {
    // 从count开始倒数，每次间隔1秒
    for (int i = count; i > 0; --i) {
        cout << i << "秒后结束。" << endl;

        // 当前线程睡眠1秒
        this_thread::sleep_for(chrono::seconds(1));
    }
}

void output_text() {
    // 定义字符串，遍历输出每个字符
    string text = "这是一些文本。";
    for (char c : text) {

        // 输出单个字符并刷新输出流，每次间隔200毫秒
        cout << c << flush;
        this_thread::sleep_for(chrono::milliseconds(200));
    }
}

int main() {
    // 定义两条线程并启动它们
    thread t1(countdown, 10);
    thread t2(output_text);

    // 等待线程执行完毕
    t1.join();
    t2.join();

    // 输出完毕后返回0
    cout << "倒计时和文本输出已完成。" << endl;
    return 0;
}

这是我写的代码 报错：32 2 C:\Program Files (x86)\Dev-Cpp\MinGW64\lib\gcc\x86_64-w64-mingw32\4.9.2\include\c++\bits\c++0x_warning.h [Error] #error This file requires compiler and library support for the ISO C++ 2011 standard. This support is currently experimental, and must be enabled with the -std=c++11 or -std=gnu++11 compiler options. 是直接调到warning文件保存的,有没有大佬帮忙解决一下啊,我是用dev 5.11的