C++ :: Combinational Logic Simulation Using QThreads
Oct 30, 2013
I'm trying to create program that reads in commands from an input file, and accordingly creates, connects or destroys logic gate primitives (and gates, or gates). Additionally, I'm trying to modify a previous program that I wrote to do this using QThreads, where each gate is placed in its own QThread. I'm trying to avoid using invokemethod, and I'm sure this method can work. My specific issue that I'm having trouble debugging is in my connect code block in main.cpp. Whenever I try to reference a gate specified by the input file that is NOT the true or false gate (I have one of each and they are attached to any gate that needs a true or false input), I get only a NULL reference. This includes attempting to reference the gate in my gatelist QMap. Calling gatelist.value(newCommand.at(1)) causes the program to hang, and the connect statements referencing said gate return errors about connecting a signal or slot of a NULL pointer.
Here is main.cpp:
#include <QPointer>
#include <QMap>
#include <QDebug>
#include <QString>
#include <QFile>
#include <QTextStream>
[Code] ...
My accompanying class declarations can be found here : [URL] ....
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Nov 24, 2014
I have to write a program to take packets of information destined for certain ports then provide the current message using the packets I've gotten so far. Packets can come out of order, so when asked for the message, packets that haven't arrived yet are skipped and the next packet is appended. After giving the message, I have to delete all the current packets as well as ones that are received late, after the packets that were supposed come after the late packet were already provided in the message.
Data:Up to 1000 ports, numbered 0-64000, and each message can contain up to 1000 packets.
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Sep 26, 2014
how to write a "charge simulation method" program in C or C++? It's to calculate electric distribution and also electric potential of two different dielectrics. I have attached the diagram of the shape of the electrode that needs to be investigated.
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Feb 1, 2015
Here is the assignment I get:
Write an email simulator that processes mail at an average of 40 messages per minute. As messages are received, they are placed in a queue.assume that the messages arrive at an average rate of 30 messages per minute.messages must arrive randomly.
Each minute, you can dequeue up to 40 messages and send them. Assume that 25% of the messages in the queue cannot be sent in any processing cycle.use a random number to determine whether a given message can be sent. If it can't be sent, enqueue it.
Run the simulation for 24 hours, At the end of the simulation, print the statistics that show:
-The total messages processed.
-The average arrival rate.
-The average number of messages sent per minute.
-The average number of messages in queue in a minute.
-The number of messages sent on the first attempt, the number sent on the second attempt, and so forth.
-The average number of times messages had to be requeued (do not include the messages sent the first time in this average)
Well, actually I've done a part of the coding. But how to continue it. And here is my code :
#include <iostream>
using namespace std;
#define SIZE 40
class Queue {
int queue[SIZE];
int head, tail;
public:
Queue();
void Enq(int num);
[code]....
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Jan 25, 2013
My Project is to Dynamically Link 2 Software for Co-simulation n C/C++. So that Output of One Software becomes Input of Other automatically . at present we input the parameters manually in both the software . what to do so that it pick up values itself and gives the output by solving each and everything at once in both the software .
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Jan 23, 2013
I have to simulate flash memory using C++ for a project.
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Feb 11, 2013
How do i define user and lottery..
//Declarations
#include <iostream>
#include <cstdlib>
#include <ctime>
const int lotteryDigits = 10;
const int SIZE = 5;
const int Power = 1;
int generateLottery(int[], int, int);
[Code] ....
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Feb 17, 2014
Anyhow, I have a program due Wednesday that is along the lines of the classic Bank Teller simulation using Queue's.
Unlike most of these programs, I have to integrate my own Queue, QueueNode, Teller, and Customer classes. I have attached all of these headers below plus the main file.
Now the error: While I'm sure there are other issues with the code, it will not let me create a new customerQueue (of Queue type) object as such:
Queue<Customer> customerQueue;
The error it is giving me is:
no matching constructor for initialization of 'Queue<Customer>'
Here is my code:
Queue.h:
#ifndef QUEUE2_H_
#define QUEUE2_H_
#include <iostream>
#include "Teller.h"
#include "Queue.h"
[Code] ....
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Apr 25, 2013
I'm currently working on a simulation of the motion of magnets on a rod. As part of it, there are arrays of the properties of the magnets:
long double *accelerations; // These will later be dynamically allocated depending on the number
long double *velocities; // of magnets
long double *positions;
However, when I go to compile this, the compiler gives me these error for the pointers:
error: two or more data types in declaration of 'accelerations'
error: two or more data types in declaration of 'velocities'
error: two or more data types in declaration of 'positions'
Apparently, the compiler isn't recognising long double* as a type and is instead reading is as the two types long and double*.
My compiler is MinGW 4.4.3
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Sep 5, 2014
I'm supposed to build a banking simulation program around the BankAcct class, which provides the following service: create new account with unique account number (maximum 5 accounts created in a single test running); deposit/withdraw; print information of all existing account. I was running a test program with only 2 services first, namely creating new account and depositing, but the program just keep on crashing and I couldn't figure out why.
#include <iostream>
#include <sstream>
#include <string>
using namespace std;
[Code].....
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Jan 7, 2012
Code:
1
121
12321
1234321
123454321 EDIT:
the above pyramid looks like a doom.i.e 1-5 will be in center.1-4(L)1-3(L)1-2(L)1(L) similarly 1-4(R) 1-3(R) 1-2(R) 1(R)
I'm partly successful in building the requirement of the program.but cant able to think the logic for the other half. how can i proceed.below is the code written in c#.
Code:
for (int i = 1; i <= 5; i++)
{
//int l = 1;
[Code]....
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Jan 24, 2014
So I have a program where I solve a maze using stacks. So my display_maze function take two parameters and displays the maze according to where the x coordinate and y coordinate are.
I have an error during my move function, as my maze doesn't display for some reason
void Player::player_move() {
Stack stack;
Maze maze;
Lock taken;
// Monster monster;
stack.push_values();
[Code] ....
It should be displaying, because after debugging I discovered the problem isn't with the display_maze function.
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Oct 30, 2014
So I'm trying to take some information that a user inputs and to then write it into a .txt file. The user would input a student ID followed by 4 quiz grades. I need to use nested loops for the input, a while loop for the outer and a for loop for the inner.
The data in the .txt should would look like:
studentID quiz1 quiz2 quiz3 quiz4
studentID quiz1 quiz2 quiz3 quiz4
etc.
My problem is I'm not sure how to structure the code. I have very few examples I'm working with to understand what I'm working with.
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Feb 27, 2014
I was developing an exercise program for myself (note: not a project in school) to enhance my programming skills in C++ then I encountered a "logic bug" (that's how I call it :D ) I think. I googled stuffs I need to know and ended up to post my question here.
Here's the scene:
1. When using GetAsyncKeyState I can capture Function Keys [F1-F12, etc..]
2. While doing and having fun to my exercise program, I suddenly noticed that whatever key I pressed from the keyboard {example: asdfkj], it keeps the keys entered and brings to a "field" that accepts user input.
What you should do...
1. Press any key (example: asdfisdjfisdjff) then proceed to press F1. And see what happens. I don't know how to erase what I have entered before pressing F1.
here's the code.
#include <cstdlib>
#include <iostream>
#include <windows.h>
#include <string>
using namespace std;
void gotoxy();
void gotoxy( int column, int line ) {
[code]....
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Sep 17, 2013
My issue is regardless of which date I input its always defaulting to the values I have set in my constructor in my implementation file in the else statement. So the values always default to 3/15/2006 I think its something to do with the logic in my bool function but I may be incorrect.
header
//date.h header
#include <iostream>
#include <string>
using namespace std;
enum DateFormat {numeric, standard, alternative};
const int MIN_YEAR = 1900;
const int MAX_YEAR = 2015;
[Code] ....
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Nov 18, 2014
I need to create code based upon the following pseudo code:
dictionary=vector
file containing words to search for=external file
While there more words to search, for search the dictionary if the entire dictionary is searched and the word is not found, return the word, search the dictionary for the next element (and so on)
I cannot for the life of me figure out the sequence of loops to do this. The following code returns all of the words instead of just the ones not found in the dictionary, but it's all I've got after countless changes:
#include <iostream>
#include <fstream>
#include <vector>
#include <string>
using namespace std;
int main() {
string dictword;
ifstream dictionary;
[Code] ....
And it returns every word in the external file.
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Jan 28, 2014
I can't seem to find the logic error in my perceptron. The perceptron's feedback function pushes back a bias of 1.0 into the input vector, and calculates the dot product of the input vector and it's weight vector, and returns 1 if the dot product is > 0, and -1 otherwise. This will determine whether the inputted point is above or below the hyperplane given by the functor.
The training function instantiates a trainer object , which feeds it a vector random numbers, along with the correct answer (in this case, whether the point is above or below the hyperplane given by a functor). It then calls the feedback function, and subtracts its answer from the correct answer, and updates the weights by adding the input vector to the weight vector, and multiplying the weight vector by the error, and by a correction factor, in this case 0.01.
Typedef.hpp
Code:
#ifndef TYPEDEF_HPP
#define TYPEDEF_HPP
#include <vector>
#include <random>
typedef std::vector<float> FloatV;
typedef std::random_device RNG;
typedef std::uniform_int_distribution<> UID;
[Code] ....
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Nov 22, 2013
I have been struggling with this program. I am somewhat new to c and suck at logic. I have a personal program I want to make that I will try to get extra credit for in school. I have a printed set of winning lottery numbers form the last 10 years. I chose the easiest one do do logically which is just 5 numbers none repeating.
I am trying to find out how I can print the least common 10 sets. I think if there are any set which have not been picked I would have to print all of those because logically they would all be equal, then print sequentially the sets least picked up to 10.
I have pseudocode which I am sure is wrong but will post it just to show that I am trying. My first attempt was to add the numbers but quickly realized that that wouldn't work ...
5 Nums Pseudocode
Code:
Read Nums
Parse Into Ints
Make Array [185] //39+38+37+36+35 The highest the numbers added together can go
//LOGIC
[Code] ....
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Jan 14, 2015
I have a doubly linked list from which I need to occasionally delete elements (any elements that have a type value different from 0). The function I have seems to work, but looking at it, I think I could probably make the logic cleaner.
The structs in questions are declared here, with irrelevent variabled omitted:
Code:
struct Event {
//...
int type;
//...
struct Event *next;
struct Event *prev;
[code]....
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Aug 16, 2014
In a record I have IDs of type int but some may repeat. These IDs also got sales of type float. I wish to compare the IDs number of times they appear and of match found accumulate their sales and put it in another struct. However if an ID is found which is new I pass it to a function to initiate sales..but my code never reach second ID, given I am trying with two IDs.. given IDs in transFile
ID Sale
12345 870
90909 100
I enter these two in transFile and match it with masterRecord. 12345 is matched and updated likewise but 90909 is never executed or matched in checkID function..
void sync_trans_files(unsigned short int count, master masterRecord[], char transFile[]){
const short int weeklyemployee=25;
//read number of records from transFile;
struct trans{
[Code].....
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Sep 15, 2014
I created a program to convert files to XML. This if statement is giving me some trouble. I am trying to replace all &s with the XML & so that &s will work in the entities of the XML file. Some entities have more than 1 &. With those which have more than one I get an output like this: <cit:district>Anambra & Enugu & Eb</cit:district> .
if(word.find("&") != string::npos) {
word.replace(word.find("&"), 1, "&");
}
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Jun 3, 2013
I'm new to C#. I'm trying to create a program to audit some of our processors. As you will see below, I have two foreach loops that allow me access to errorOrders(returns <<UserName, #of errors>>) and totalOrders (returns <<UserName, #of totalOrders>>).
However, the problem i'm running into now is that it seems to constantly loop through these two ForEach loops. When i run it, the 'count' on both errorOrders & totalOrders is 38. The program loops through all 38 users just fine, but then it continues to loop through users again...re-doing the process that it just finished.
I'm looking to see if there is another way I could set this section up so that it only loops through users once. I was thinking about trying to create a 'Boolean flag' that would force the program out of the ForEach loop after it has run through all the users...but i'm sure there are other ways to handle this.
foreach (KeyValuePair<string, int> error in errorOrders)
{
foreach (KeyValuePair<string, int> total in totalOrders)
{
[Code]....
I know i should probably seperate these two foreach loops instead of having them nested..however, the problem that arises once i do that is my errPercentage can not be calculated if i do.
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Mar 25, 2014
I have a hit a snag in a number guessing game program. I was given a half-completed program and told to use functions to complete the missing pieces. It looks unwieldy, but this is how it is supposed to be. I have temporarily made the random guess value visible for troubleshooting purposes.
#include <iostream>
#include <time.h>
#include <stdlib.h>
using namespace std;
int welcome() {
cout << " Welcome to the hi-low game!" << endl;
[code]....
The issue lies within this piece of code:
checkGuess(guess, correct); done = false; //either true or false
} while (!done);
cout << "Congratulations, you got it!" << endl;
return 0;
}
I need to manipulate the Boolean variable done so that it registers as false when the user inputs a number higher or lower than the randomly selected value. However, if the user guesses correctly, done will become true and the program will end.
As it stands now, the program will not terminate, and if I set done equal to true like so:
checkGuess(guess, correct); done = true; //either true or false
} while (!done);
cout << "Congratulations, you got it!" << endl;
return 0;
}
Every number the user inputs will register as correct instead of the one right guess.
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Mar 14, 2014
I once again have a logic error. This time I am positively baffled: I am making a function that messes with three vectors it receives as parameters. The function adds new items to those vectors, but the funny thing is, while it completely normally adds items to two of the three, it fails to do so for the first, despite the fact that I use the same template! Here the function is:
void giveReward( Character player, vector<string>& spells, vector<string>& weapons, vector<string>& armor ) {
int reward, rewardGen;
srand( time( 0 ) );
reward = rand() % 3 + 1;
[Code] ....
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