Coding Practice

Programming Support
#1

So I’m thinking of having my kids practice coding and the ROBOTC for VEX cortex has a really awesome guide and lets you practice with some basic coding. I was really getting the hang of it but really cannot figure out what it is asking me to do for the Labyrinth Challenge.
Here is the instructions that were provided:

  1. Move forward full speed for 2.3 seconds
  2. Stop both motors for 1 second
  3. Swing turn to the right at full power for 1.5 seconds
  4. Stop both motors for 1 second

This is the code it had also provided:

task main()
{

//move forward full power for 3.5 seconds
motor[port2] = 127;
motor[port3] = 127;

wait1Msec(3500);

//stop
motor[port2] = 0;
motor[port3] = 0;

wait1Msec(1000);

//turn left
motor[port2] = 127;
motor[port3] = 0;

wait1Msec(1500);

//stop
motor[port2] = 0;
motor[port3] = 0;

wait1Msec(1000);

//END OF FIRST LENGTH

And finally here is what I changed it to but it says this is not correct:

task main()
{

//move forward full power for 2.3 seconds
motor[port2] = 127;
motor[port3] = 127;

wait1Msec(2300);

//stop
motor[port2] = 0;
motor[port3] = 0;

wait1Msec(1000);

//turn left
motor[port2] = 0;
motor[port3] = 127;

wait1Msec(1500);

//stop
motor[port2] = 0;
motor[port3] = 0;

wait1Msec(1000);

//END OF FIRST LENGTH

}

When I ask for a hint it says: most of the code is already written so change the values.

I would appreciate any help! Thank you!

#2

for turning right you also probably want to set motor[port2] in full reverse, or -127

#3

Just for reference, you can use ``` to format your code.
This is the code provided:

task main()
{

//move forward full power for 3.5 seconds
motor[port2] = 127;
motor[port3] = 127;

wait1Msec(3500); 
//stop
motor[port2] = 0;
motor[port3] = 0;

wait1Msec(1000); 
//turn left
motor[port2] = 127;
motor[port3] = 0;

wait1Msec(1500); 
//stop
motor[port2] = 0;
motor[port3] = 0;

wait1Msec(1000); 
//END OF FIRST LENGTH
}

This is your altered code:

task main()
{

//move forward full power for 2.3 seconds
motor[port2] = 127;
motor[port3] = 127;

wait1Msec(2300); 
//stop
motor[port2] = 0;
motor[port3] = 0;

wait1Msec(1000); 
//turn left
motor[port2] = 0;
motor[port3] = 127;

wait1Msec(1500); 
//stop
motor[port2] = 0;
motor[port3] = 0;

wait1Msec(1000); 
//END OF FIRST LENGTH

}

Your code seems correct, perhaps you should change all the comments to reflect your code. I notice that the comment still says turn left instead of turn right.

Also @DrewWHOOP,

Swing turn would not require the other motor to reverse (since that would make it a point turn) .

6 Likes
#4

oh, my bad

1 Like
#5

Thank you, I did try to change the comments in green as well but this did not work either. I am pretty stumped because I do believe I have the code right. I will continue to try to problem solve!

1 Like
#6

Vex really out here with secret STEM problem-solving challenges

1 Like
#7

I know I was enjoying the practice a lot but found it pretty difficult and did not want to try it with the kids I teach if I can’t even figure it out myself first haha!