C++ how to sleep?

Question

I am a novice in C++ and I am struggling to make my program to wait a few minutes before executing a function.

I know there are lots of topics about it but I have a problem with my compiler. I can't seem to use the boost library nor the thread library. And since I can't use the thread library, I can't use the chrono library either.

I am using GNU GCC Compiler. I have MinGW installed. Is it outdated or something? What is the best compiler to code in C++? My OS is Windows.

sleep(X seconds) https://msdn.microsoft.com/en-us/library/windows/desktop/ms686298(v=vs.85).aspx (btw, you can use C usleep command to ms sleep) — AsfK, Sep 06 '15 at 13:23
What compiler version? `g++ --version` and what flags are you using to compile? — Galik, Sep 06 '15 at 13:36

score 1 · Answer 1 · answered Sep 06 '15 at 13:30

1

You could use this

#include <unistd.h>
...
usleep(1000); // Time in microseconds

or

 #include "stdafx.h"
    #include "windows.h"
    #include "iostream"
    using namespace std;
    int main(){
    int sleepTime = 1000;
    Sleep(sleepTime);
     return 0;
    }

answered Sep 06 '15 at 13:30

WAQ

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I tried usleep(300000000); but it was't sleeping at all. stdafx.h is not supported. – user3757605 Sep 06 '15 at 13:46

score 1 · Answer 2 · answered Sep 06 '15 at 15:52

1

<thread> is only available starting with C++11.

It's likely you don't have the proper flags to tell GCC you want to enable C++11 support, which is disabled by default.

The command line parameter is -std=c++11.

Then, you can use std::this_thread::sleep_for() for cause your program to fall asleep. Note that if you only have one thread in your program, it will probably stop responding to user actions during that time.

answered Sep 06 '15 at 15:52

Steve

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I enabled the C++11 flag and I don't get an error that thread library is not found anymore. However I still do get an error saying 'std::this_thread' has not been declared'. – user3757605 Sep 06 '15 at 17:58
Are you using Eclipse? It's possible you need to enable the flag in two places - once for Eclipse's parser, and one for the compiler. See [this answer](http://stackoverflow.com/a/9135135/425871) for some details about that, it might help you if this is the case. – Steve Sep 06 '15 at 18:02

C++ how to sleep?

2 Answers2