C++ :: Flash Memory Simulation Using A Code
Jan 23, 2013I have to simulate flash memory using C++ for a project.
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C :: Would Save Memory Using Strdup In Code
Jul 22, 2013I wrote a text parser to print all the words of each line separate from each other. My question is mainly concerning memory usage, should I go ahead and directly assign the contents of a token, or should I use strdup()? Or will the strings be freed when the pointer to arrays of characters is freed? Here is my code so far
Code:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main( )
{
FILE * music_file = NULL;
char line[BUFSIZ];
char ** tokens = malloc(sizeof(char *));
}
[code]....
In case you were wondering about some of the variable names, I am going to use this to parse notes in a music file for my program I've been developing lately.
C++ :: Reduction Of The Flash Footprint
Nov 26, 2014I'm currently involved in an embedded (cortex M3) C++ project where we're about to run out of flash.
A quick check of the map file give that, in our case, the destructors consume about 10-15% of the available space. Since we're allocating all things that are needed at startup but never delete anything (both a requirement & also impossible due to the lack of a proper memory manager) the thought of getting rid of all destructors in the target build is appealing.
I know that this question is somewhat crazy/desperate but is there a safe way of telling gcc not to emit any code for destructors? If so, can that be made in such a way that a linker error catch for instance mistakes such as creating an object on stack?
C++ :: Packets And Tcp Simulation?
Nov 24, 2014I 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.
Visual C++ :: Partitioning USB Flash Drive?
Dec 9, 2014I have written some code to make two partitions in USB flash drive. When I ran it I am not able to make partitions on usb. What'll be the problem in this code.
Code:
/-------------------INITIALIZE AND PARTITION-------------------------------//
#include "stdafx.h"
#include <Windows.h>
#include <stdio.h>
[Code].....
C/C++ :: Charge Simulation Method?
Sep 26, 2014how 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.
View 1 Replies View RelatedC/C++ :: Email Simulation Using Queue?
Feb 1, 2015Here 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]....
C/C++ :: Writing To Specific Sector In Flash Drive
Apr 22, 2015I am trying to write a to a specific sector in a flash drive. The problem is that it will only allow me to write to sectors 0 to 15. When I try sector 16 or higher nothing happens, but in sector 0 to 15 is is working fine.
#define BUFFER_SIZE 512
int main(void) {
FILE *volume;
int k = 0;
long long sector = 0;
char buf[BUFFER_SIZE] = {0};
[Code] .....
C/C++ :: Read CSV File From Flash Drive (Ubuntu 12.04)
Mar 26, 2013I want to read a file from my flash drive called text.csv. However, I cannot even open the port where my flash drive is connected. This is the code that I am using, but I get error since the first part. When I run the program it says "fopen Error". I am using Ubuntu 12.04.
#include<stdio.h>
#include<string.h>
#define SIZE 1
#define NUMELEM 5
int main(void) {
FILE* fd = NULL;
[Code] ....
C Sharp :: Alter Size Of Flash Movies?
Nov 5, 2012I have a flash movie that is bigger than the axShockwaveFlash placeholder that plays it. The axShockwaveFlash placeholder expands to the size of the movie.
I have found a website at [URL] but asp is totaly different from c#.
How can I make the movie shrink to fit in the axShockwaveFlash placeholder?
C++ :: Dynamic Linking Of Two Software For Co-Simulation
Jan 25, 2013My 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 .
View 5 Replies View RelatedC++ :: Combinational Logic Simulation Using QThreads
Oct 30, 2013I'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] ....
C :: Retrieving Values That Are Stored To Compact Flash Card
Sep 19, 2013My specific request is for retrieving values that are stored to a CompactFlash card. I am able to store values (we call them recipes) to the CompactFlash card as .csv file. I just haven't been able to figure out the code to retrieve this information back to the touchscreen.
Code:
// Create a new folder if it doesn't exist
CreateDirectory("/recipes");
//Create the file if it doesn't exist
CreateFile("/recipes/recipe.csv");
//open the file
hfile = OpenFile("/recipes/recipe.csv", 2);
[Code]....
Now with that said, I would like to retrieve these values from the .csv file.
C++ :: Lotto Simulation - Defining User And Lottery?
Feb 11, 2013How 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] ....
C++ :: Error In Classic Bank Teller Simulation Program?
Feb 17, 2014Anyhow, 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] ....
C++ :: Simulation Of Motion Of Magnets On A Rod - Long Double Not Working
Apr 25, 2013I'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
C++ :: Build A Banking Simulation Program Around The BankAcct Class?
Sep 5, 2014I'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].....
C++ :: Flash Card Type Console Application - Declaring Array Of Hexadecimals
Dec 26, 2013I'm making a flash card type console application using visual studios 2013. The flash cards contain character that I can display using unicode. So far I am looking at about 200 characters across 2 unicode blocks which I don't want to hard code into my arrays. I thought of initializing my arrays using a loop. The only problem is I don't know how to add in hexadecimal. So is there a way to initialize my array without having to input 200 values my self? Also is hexadecimal addition possible without me having to write a function for it?
View 3 Replies View RelatedC Sharp :: How To Remove All Format Of Video File And Flash File
Dec 11, 2012I am creating small application using c#.net.I removed all image tag using regular expression no I want to remove all video file and flash file also in source code of webpage.
so far I have tried this ...
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
[Code] .....
C :: Print Out - Array Code And Pseudo Code?
Apr 15, 2013I have assignment which requires me to print out and array code and a pseudo code. I dont no what a pseudo code is,.
View 2 Replies View RelatedC++ :: Reducing Code Duplication From Common Code Calling Common Class
Apr 13, 2014I 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?
C++ :: Memory And Int Not Being Declared
Mar 19, 2013I had a quick question regarding a program I am trying to complete. I have the basics worked out, and everything seems to be done, but I am running into two issues.
1= The program keeps telling me "Run-Time Check Failure #3 - The variable 'order' is being used without being initialized."
and
2= When I reach my output screen I receive "Unhandled exception at 0x7751c41f in CISC 192 Project 3.exe: Microsoft C++ exception: std:Out_of_range at memory location 0x002eefb8.."
While the first one isn't necessarily a deal breaker the second one definitely is.
Code:
// Bookstore Project 3.cpp : Defines the entry point for the console application.
// Declarations
#include "stdafx.h"
#include <iostream>
#include <iomanip>
#include <cstdlib>
#include <string>
#include <istream>
[Code] ....
C++ :: GMP Library Memory
May 11, 2013I'm trying out the gmp library by building a simple pi calculation program (original, I know!). On a million digits of Pi I've debugged the program and seem to have about a megabyte too much of memory at the end of the program (I start with around 250k before any allocation begins and end at around 1200).
int main(int argc, char *argv[]) {
//set a//
int digitsofpi =1000000;
mpf_set_default_prec(log2(10) *digitsofpi );
mpf_t a;
mpf_init (a);
mpf_set_ui (a,1);
[code].....
C/C++ :: How To Run A Process From Memory
Mar 8, 2013I am looking for a way to run a process form memory, without having any executable. The application will be kept inside a resource and will be extracted during run time. It should be then started as a new process. I couldn't find a solution that works also on x64
View 5 Replies View RelatedC++ :: How Much Memory Allocated
Nov 6, 2014We have a proprietary third-party library that we make calls into via an API. Through a series of API calls, this library manipulates specific sets of data. Prior to making these calls, there are some API calls that are necessary in order to initialize the library in preparation for a specific set of data. One of the calls tells the library to allocate some memory and then perform whatever initialization is required. This particular API call returns a pointer to char (char*) that is later used as an argument for a few other API calls. My question is... Is there a way, or maybe some kind of trick, to tell exactly how much memory was allocated? It doesn't matter whether or not the solution (if there is one) is C++ related, or some series of OS commands. FYI: We're running on Redhat Linux 6.2 and using GNU C++ 4.4.6.
View 5 Replies View RelatedC :: Manipulating Data In Memory
Jan 31, 2015So, it seems I have a bug in my code:
Code:
char *mem = malloc(9), *bottom = malloc(3), *in = "abc";
int position = 2, i;
mem = "onetwo";
printf("OLD mem = %s
", mem);
[Code]....
What I'm trying to do is insert "abc" in the 3rd position of "onetwo". Results would be "oneabctwo", but all I get is crashing.