How to measure the duration of a keypress hold C++ [closed] - c++

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Hi I am creating a small program for a game analysis (its a hobby and I have no idea what I am doing so please don't expect much from me) in C++ which can do three things.
Recognise and count a pressed key (upon release increase times pressed by one)
Measure the sum of press duration of a certain key (already made a timer class for that purpose)
Output all in a .txt file like this:
Letters: A Times_pressed: 14 Duration: 10000ms
Here is my code so far I started with count the times but I cannot figure it out how it works. It increments very fast when 'A' key is pressed and when released it stops. Which is not what I really want. I want increment of only +1 even if I hold it for ages but upon release and repeat next increment of +1.
Any advice or help would be highly appreciated!
#include <iostream>
#include <windows.h>
int main()
{
int aKeyCount{0};
while (true)
{
if (GetAsyncKeyState('A') & 0x8000)
{
++aKeyCount;
std::cout << aKeyCount << std::endl;
}
}
return 0;
}

Answer 1

The reason why your code increments very fast when the 'A' key is pressed is because GetAsyncKeyState() returns a value of 1 as long as the key is held down. In other words, your code is counting every time through the loop that the key is held down, which is many times per second.
a boolean flag is added to keep track of whether the 'A' key was previously pressed or not.
#include <iostream>
#include <windows.h>
int main()
{
int aKeyCount{0};
bool wasKeyPressed{false};
while (true)
{
if (GetAsyncKeyState('A') & 0x8000)
{
if (!wasKeyPressed)
{
++aKeyCount;
std::cout << aKeyCount << std::endl;
}
wasKeyPressed = true;
}
else
{
wasKeyPressed = false;
}
}
return 0;
}