I'm doing a practice problem where I need to read pseudo code and understand what it does.
For this code, I believe it will move the robot forward while i<650, so it moves it forward for 650 steps in total. Then it sets the motors to 0 when it's finished.
Code:
while(i<650)
{ rotateCW(2);
rotateCCW(1);
Delay1KTCYx(50);
i++;
LATD=0x00; //Set all Port D to 0
}
This code I'm having the most trouble with. So while(1) the pot(potentiometer) read's the ADC. Then it scales the adc, not 100% sure what the +20 and *.22 mean, I think it has to do with binary conversions?
Now it sets pin 1 of port 1 to 0, delays based on pot above, and sets it back to 1, and delays again. I assume something to do with controlling motor speed based on the potentiometer.
Code:
void main(void){TRISD = 0x00; // Setting port D to outputs
LATDbits.LATD0 = 1; // Setting bit 0 of port D to 1
while(1) {
pot = readADC();
pot = pot * 0.2297 + 20;
[Code] ......
My best guess is: The car moves forward 400 steps, stop, turn right for 230 steps, stop. At this point it would begin moving straight, and it would turn left/right as needed to keep the robot in the center of the track.
Code:
void main(void) {
for(i=0;i<400;i++) {
rotateCW(2,motor); //Rotate motor two (one step)
rotateCCW(1,motor); //Rotate motor one (one step)
Delay1KTCYx(50);
I have finished writing the code for the following program. I have concerns with the pseudo-code that I have written and the flow chart seems really complicated. I dont know how to build it. Here is the question:
An Internet service provider has three different subscription packages for its customers: Package A: For $9.95 per month 10 hours of access are provided. Additional hours are $2.00 per hour. Package B: For $14.95 per month 20 hours of access are provided. Additional hours are $1.00 per hour. Package C: For $19.95 per month unlimited access is provided.
Write a program that calculates a customer s monthly bill. It should ask which package the customer has purchased and how many hours were used. It should then display the total amount due.
Input Validation: Be sure the user only selects package A, B, or C. Also, the number of hours used in a month cannot exceed 744
Here is my program: #include <iostream> using namespace std; int main() { char package; int hours;
[code]....
What should be my pseudocode and flowchart ? Can i copy and paste my pseudocode here ?
Set found to false. Set position to -1. Set index to 0. While found is false and index < number of elements If list[index] is equal to search value found = true. position = index. End If Add 1 to index. End While. Return position
Design an algorithm using flowchart or pseudo-code to prompt the user for a series of positive integer values. Calculate the average of these values and display the average at the end of the program. Assume that the user types the sentinel value -1 to indicate end of data entry.
Sample input-output: Enter a positive integer (-1 to end) : 5 Enter a positive integer (-1 to end) : 7 Enter a positive integer (-1 to end) : 6 Enter a positive integer (-1 to end) : -1
The average value is: 6
I searched online and found out this solution however it is only for three numbers.Is there any way of modifying this to include the sum of x numbers / number of x(integers) to find the average?
Im trying to tune my PID loop to make my robot balance but i dont know if im using the right terms for my robot? Im implementing a contemporary filter for my Gyro(98%) and Acc(2%).Is the following right?
output=(Kp*error)+(Ki*(error*dt))+(Kd*((error-prev_error)/dt)) error=robot angle --Balance point at 0deg prev_error=--Previous error dt=0.01 --10ms delay
I am attempting to write a simple program and compile it onto a 3pi robot. My problem lies with my array, i need the array to increment by one every time through and whenever i run the code the print out reads "ROOM 0" every time.
#include <pololu/3pi.h> /* allow use of 3pi robot functions */ #include <avr/pgmspace.h> /* allow use of program space */ #include <stdio.h> /* for printf() */ #define NUM_ROOMS 11 /* the number of study rooms */ /* function prototype for battery check */ void bat_check( void );
I know how to create your basic programm that compiles as a CLI or exports and/or saves data to a .txt file... But how does one build a GUI?
I ask because I am currently working on a programm for my Arduino controlled robot, in which I want to have a virtual on screen controller next to a map of my bots path.
Code: #include <stdio.h> #include <string.h> #include <stdlib.h> int encrypt_data(FILE *);
[Code] ....
I am trying encrypt the file "encrypt" when I enter it I get "Error in reading file"
I think its a problem with the fgets() and scanf()...I tried both fgets out and then scanf but I get the same error.
I look in the directory and see that when I enter a file to be encrypted a blank file with a "?" at the end is created in the directory. so I try to encrypt "encrypt" it shows error then creates "encrypt?"
I then tested it by entering a random file name that does not exist
EXAMPLE
Please enter file to be encrypted: fakefilename
Error in reading file.
I look in the directory the non existent file now is listed "fakefilename"
How to compact my code. I have a file that my program will read several times. Each time a different test will check it for something specific. I can't check it all at once because I let the user specify what to check. I'm currently using an ifstream with a while loop to read until the end of file.
Here are three approaches :
1. I keep a static ifstream in a function and call it each time I want a new line to read. The function will "remember" what line is at and returns a new line each time (I suspect this can work but I'm not 100% sure). Each function can then be separated and call readline to get a new line back.
2. I make one giant while loop and make case statements that call the correct case and pass the string all the way down to the test function that is being run.
3. Write everything to some sort of array buffer. The file isn't terribly big about 1000 lines.
What should I do? Is the first approach even worth the effort to cut down a few lines of code? The second case doesn't seem to be much better as I cannot reuse anything.
I know it sounds strange but I've seen things that have files which contain source code (usually in something in Python or such) and how this is read on run-time?
I have a script that checks and compares two lists from an offline dictionary. Dictionary.txt which has a lot of words in it. input.txt will compare to dictionary.txt and print out anything that matches in CMD.
However, instead of using an offline dictionary is there anyway to make a code check an online dictionary? If so, would this process be slow or fast?
I've been trying to make a program to return node values for the shortest path from one node to another. I've searched up several algorithms like the Bellman Ford, A*, or Dijkstra and tried to think of ways to implement them if I store my map as a matrix. I've considered using a hash table, but since I am only a beginner, I am having trouble trying to understand how the concepts would translate into C.
I have a class 'A' which is almost perfect for my needs. Class 'B' uses class 'A' I've now designed Class 'C' and Class 'D' and noticed that there is a good chunk of code in class 'B', 'C' and 'D' for using Class 'A' is duplicated. I've separated out this code in specific, standalone functions in each of the classes. Now I'm wondering where this code should go. At the moment, the functions are duplicated in the three calling classes (B, C and D). Placing the functions into class 'A' would break the single responsibility principle. Inheritance to add functionality would likely break both SRP and LSP. The one that seems that it may work is composition.
However, Is designing a complete class just for a few functions over kill?
Would it be valid for classes 'B', 'C' and 'D' to access both the new class 'E' (which would depend on A) and the old class 'A' (which would have to be the same instance as the instance in the new class 'E'), or should the new class 'E' provide sufficient functionality so that Classes B, C and D don't need to access Class A directly? It would seem that its then an incomplete interface of the original object with additional functionality (ie, incompatible) Or should I do it a completely different way?
I am making a game and want to make an updater that grabs the source code from a page on the web. Can this use things that are available to all platforms? It could just be something that grabs the text from the page and executing it (maybe using something like Python's exec() command ?) BTW I'm using mac
this is my code i want to put the part where i have it do multiplication and addition into functions. and then call them so that it can run the addition and multiplication. Heres my code
# include <iostream> using namespace std; int main(){
I'm pretty new to C++ and I'm on Binary Trees in "Jumping into C++"! I've just created a DLL project on Code::Blocks, and I cannot get it to build and run: "You must select a host application to "run" a library..." is the message that I'm getting when I run the main code file. It's had no changes to it (except for a few extra, unnecessary line feeds), and it's the file which Code::Blocks generates on a DLL project.
whats wrong with this code, I'm trying to parse a .js file and replace all the ";" with "; " i.e add a new line after each ";". So I load the file into a char[] buffer then assign a string to this contents of this buffer. Then loop char by char through using an iterator and check for a ";", if found use replace. So int i gets to about 85898 then crashes with unknown error, 'i' should reach about 175653. It does work up till it crashes. And, is this not a simpler way to load a file into a buffer, there is in C.
