How to modify the Walking by the Input

Hello
I've just add a simple Input movement to my 2D game but when I will hit the D Key 100 times the fastest as I can,when I will release the D Key the character is still moving.
I want to make that the Player will stop when I will release the button but I don't know how.

 

Are you using Rigidbody2d and forces? Then set rigidbody2D.velocity = Vector2.zero, that will stop your character.

 

I'm not using the RigidBody2D.
Here is a part of my script

Code (CSharp):

1. void Update () {
2.      
3.         if (Input.GetKeyDown(KeyCode.D))
4.         {
5.             if(DWalk && NextWalk)
6.             {
7.                 NextWalk = false;
8.                 WWalk = false;
9.                 SWalk = false;
10.                 AWalk = false;
11.                 pos += Vector3.right * (float)6.4;
12.              
13.                 rowNumber = 2;
14.                 colNumber = 0;
15.                 totalCells = 4;
16.              
17.                 transform.position = Vector3.MoveTowards(transform.position, pos,Time.deltaTime * (float)speed);
18.                 traveling = true;
19.                 StartCoroutine(WalkAnimationCourtine());
20.                 NextWalk = false;
21.                 StartCoroutine(WaitCourtine());
22.             }
23.          
24.         }

NextWalk is checking that for 0.5 second Player can move again,but as I said When I will hold the Button many times,the Player will walk even when the NextWalk is false

 

And I've got another problem.
When my character will collide with a NPC,the Screen is shaking.

 

Is there a problem with your coroutine? If you do something like this instead:

Code (CSharp):

1. float NextWalk = 0;
2.  
3. void Update () {
4.         if (Input.GetKeyDown(KeyCode.D))
5.         {
6.             if(DWalk && NextWalk < Time.time )
7.             {
8.                 NextWalk = Time.time + 0.5f;
9.             }
10.         }

 

DWalk and the NextWalk are booleans so the operand "<" cannot be used.

 

That is why I redefined it as a float instead. (You could certainly use a different variable name if you want to...)