Download COBOL: From Micro to Mainframe by Robert T. Grauer PDF

By Robert T. Grauer

For classes in Cobol Programming. This variation is designed to meet all your COBOL wishes - on a number of structures. The textbook covers all easy COBOL components, with extra chapters at the 12 months 2000 challenge, established programming and layout, debugging, subprograms, desk processing, sorting, reveal I/O, sequential dossier upkeep, listed records, and object-oriented COBOL. The 3rd variation teaches programming because it is practiced within the genuine global, with programming counsel that transcend the syntactical ideas of COBOL, that make courses more straightforward to take care of and run extra successfully.

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The object also needs to know the diameter of the wheels and the width of the track: that is, the distance between the centers of the tracks of the two wheels. The reason for this is that the DifferentialPilot class uses the wheel diameter to calculate the distance it has traveled and uses the track width to calculate how far it has rotated. java is illustrated below to show you how to make the robot move 20 centimeters using the DifferentialPilot class in leJOS NXJ. java, you can cause the robot to rotate in place by a specified angle by using the following: void rotate(double degrees) Moreover, you need to measure accurately the values for wheelDiameter and trackWidth when using this method to produce precise movement.

2. Start the two motors A and C running at 1 revolution/second. ) 3. Every 200 milliseconds, display all two tachometer count values in the same row. 4. Repeat step 3 four times, using a different row each time. 5. Print the maximum difference that you see between the motor tachometer counts. The motors should remain within a few degrees of each other according to your observation, since we used the regulated large motor EV3 class. abs(tachoCountLeft - tachoCountRight); } } By running the program above, you should observe a result similar to the following: Motor 1: 711 Motor 1: 1493 Motor 1: 2212 Motor 1: 2934 Max diff: 1 Motor 2: 710 Motor 2: 1492 Motor 2: 2212 Motor 2: 2934 The maximum difference between the two tachometer readings is 1, so you can tell that the two motors are virtually synchronized.

Java //an example for motor testing //displaying tachocount about how many degrees rotated when //pressing //ESCAPE button. A); © Wei Lu 2016 W. e. forward(); // displaying number of degrees rotated on the // LCD until an ESCAPE button is pressed! java, when developing an EV3 robotics program to control motors, you need to indicate which motor you need to program for any action. forward(); Usually, if you simply use a unique motor, the methods that you could use are as follows: 44 1. forward() 2.

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