Subliminal messages

[monkeykid113]

Hi guys, I'm learning about C++. I have an assignment but I have no idea how to write it. Is there any help?
Thanks

"Write a program which alternately prints "Hello, world!" and "Buy Coca-Cola!" for fixed intervals, between screen clears, indefinitely. The "Buy Coca-Cola" message should be below the liminal threshold (the user not be able to consciously perceive it), which is about 200ms. "

[Golden Lizard]

Sleep(200)

[PanGalactic]

Use the C++ standard library for your delays:

http://www.cplusplus.com/reference/thread/this_thread/sleep_for/

[Handy Andy]

Hello monkeykid113,

I agree with PanGalactic. Sleep(200); is more a Windows specific solution and not likely to be usable on other Operating systems. The form you will want to use is:

std::this_thread::sleep_for(std::chrono::milliseconds(200));

Add the header files "chrono" and "thread" to use this.

Hope that helps,

Andy

[gunnerfunner]

... between screen clears ...

C++ doesn't even have the concept of a console

Reference: http://stackoverflow.com/questions/6486289/how-can-i-clear-console

Windows specific solution:

#include <iostream>
#include <thread>
#include <cstdlib>
using namespace std::chrono_literals;

void f1(){std::this_thread::sleep_for(1s); std::cout << "Hello, world \n";}
void f2(){std::this_thread::sleep_for(0.8s); std::cout <<"Don't buy Coca-Cola \n";}
void f3(){std::this_thread::sleep_for(0.02s);};

int main()
{
   for (;;)//endless loop http://stackoverflow.com/questions/20186809/endless-loop-in-c-c
   {
       f1();
       f2();
       f3();
       system("cls");
   }
}

[PanGalactic]

Please don't do homework assignments for people. People need to be given the opportunity to learn. Help them to do that. Handing them the answer isn't helping anyone.