C :: Ciphering Data Segment Of Program
May 31, 2013
I would like to cipher data segmet of my executable say with a simple Caesar Cipher algorithm, i.e. any text should not be readable when executable opened with a hex editor.
It should be something that converts my plain text into a ciphered form at compile time(CPP?), and when executable is being run, should be able to convert ciphered data into human readable text.
I thought meta-programming could be the approach for this. Also, implementing complex algorithms with C pre-processor (CPP) sounds vulnerable (well, depends on one's coding skills let me say)
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Sep 28, 2013
printf is a part of code segment but found in data segment.....why is it so ?
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Mar 8, 2012
I am trying to write a client/server application that takes input to an array of structures from the user,stores the data in a shared memory segment and then writes the same to a file when I close the application. How do I get started? And how do I ensure that the server stores the data correctly? Also, the server needs to be a concurrent server that accepts connections from multiple clients.
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Apr 19, 2012
The below code is giving me segment fault during delete [] (*iter) sometimes. Is it not the proper way to delete the vector with char *
Code:
#include <iostream>
#include <vector>
using namespace std;
int main() {
vector<char*> nameList;
for (int i=0;i<1000;++i)
[Code] ....
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Apr 26, 2013
I need updating binary search three. I am working on implementation of Bentley-Ottoman algorithm for finding intersections of line segments in the plane. Code I designed works properly for all, but certain types of triangles. What is happening is that one intersection inside the triangle is never detected due to a fact that segments which intersect in that point never become neighbors in binary search tree.
class segment{
double x1,y1,x2,y2;
int name;
[Code]....
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Jan 21, 2015
I got a little question about getting the data path of my c program. I heard something like it's already given in the "int main(int argc, char **argv)". But with witch function can I get it?
For example: The program is called Pathfinder and the path is 'D:Path1Path2Pathfinder.exe'.
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May 13, 2014
I need a program. I need to add the data of five students their mobile number,address,sec, and deprtmnt....program should be like:
s.no name address phone
1.
2.
3.
4.
5.
And starting should be like press 1 to insert data
press 2 to save data
press 3 to find data
press 4 to quit
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Feb 14, 2014
Can any C++ or C program save input data?
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Nov 3, 2013
Given a set of different types of paired symbols; determine whether it is balanced or not (the opening and closing version of each type are paired correctly). Any other type of characters may appear in the input will be neglected.
For example:
(**(*[*])****) is balanced, also [{}**[]**()]** is balanced. But ((*{*)*}) is unbalanced as well as [()***[]***{*(*)}.
Write a C++ program that requires a string containing and expression as an input from the user and check for balanced bracket pairs using stack data structure.
Here is my code which give me nothing when I run it.
#include <iostream>
#include <string>
using namespace std;
class CustomStack {
[Code] ....
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Feb 15, 2014
I'm not sure why my program isn't reading data from the dat file. I'm not sure if it's because I messed up my pointers, or I'm missing something. I know we usually use Infile >> blah >> blah >> blah; to get the data from the file, but my instructor showed an example that had the struct read it for you in this format and I could just call it with pointers.
#include <iostream>
#include <iomanip>
#include <fstream>
#include <assert.h>
using namespace std;
using namespace System;
typedef int Integer;
[Code] ....
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Mar 5, 2014
I am currently writing a program that grabs information from a .dat file. When I go to debut I get this error.
Code:
#include <iostream>
#include <string>
#include <fstream>
using namespace std;
// function step 1 - declare the prototypes
void sort(int n); // catches an integer number from the call
void swap(string *p1, string *p2); //catches the location of data in ram
[Code] .....
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Nov 23, 2013
I have a local student and international student class inherit from student class. read and print are virtual functions. After i have set all the member variables when i wan to print out all the student information, my program crashes.
Code: int main()
{
clsUniversityProgram objProgram[3];
for (int x = 0; x < 3; x++)
[Code] ....
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Apr 3, 2013
here is the link to question: [URL] ....
below is my code:
friendship relations #48.cppfriendship relations #48.cpp
I have some question in regards to the b part 2. My code is working fine when the number of input is low. However when I input more larger input data to my program it start to hangs.
Here is the input: [URL] ....
Output: [URL] ....
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Jun 15, 2013
How I would store all the data. Also how would I access it after I store it. Side Note we are not allowed to use structures or objects.
For the purposes of this gradebook you should first provide a menu with the following options
-Add a new course Add a new student to a course Add grades for a student in a course Print a list of all grades for a student in a course Print a list of all students in a course Compute the average for a student in a course Compute the average for a course Store Gradebook (to a disk file) Load Gradebook (from a disk file)
-Each of these menu items should correspond to a function you will write.
-For the basic program each student will be represented by an ID number And each course by a course number
-Grades will be whole numbers only (no fractional part)
As indicated in the menu you will need to store and load using a disk file so that the data is retained.
Here are so limiting values in defining your data structures: Maximum Number of students (total) 100 Max number of courses 25 Max number of courses per student 4 Max number of grades per student per course 10
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Jan 19, 2014
Been given an assignment to create a predictive text program. What data structure I should use for this and the steps I should take when I make the program?
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May 7, 2014
I created a basic socket server, which listensing for incoming udp data. When I run the netcat program, I get a response:
Code:
$ nc -luv 1732
Connection from 10.50.11.12 port 1732 [udp/*] accepted
(?@??8?? ??.?n?5
(?@??8?? ??.?n?5|?>)
(?@??8?? ??.?n?5|?>)
^C |?>)
But with my c program it doesn't give the response. It should say something like "here is the message: " and then give a message.
Code:
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>
[Code] .....
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Feb 26, 2013
Write a program that reads data from a file (use the attached data file). These data are a student name and 3 test scores. The program should calculate the average of the 3 test scores, and display the name, 3 test scores, and the average to the monitor.
Useful tips:
a) Include the following header files: iostream, fstream, iomanip, and string
b) The name of the data file is “datafile.txt”, you need to save the file in the same folder of the source file.
c) use the manipulators (setw, setprecision, setfill, showpoint, fixed) to format the average with 1 digits after decimal point as following.
d) Use character ‘ ’ for tab.
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Aug 21, 2013
put enumerated data type in c++ for a poker program (specially for color and cardtype)?
Here are some codes:
//card.cpp
#include "cCard.h"
using namespace std;
cCard::cCard()
[Code]....
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Apr 11, 2013
How would I check for proper data type when someone is to input a value into the program? Ex:
int i;
string a;
cout << "Enter a number: ";
cin >> i;
cout >> "Enter a string: ";
cin >> a;
How would you check to make sure that int i would be an actual number and not a letter like "a"?
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May 14, 2013
How is it possible to store the related data of a program C++ into an external file (like as .txt) and retrieve it?
I want to write c++ program that can contain data members " id and phone"
like as
Code:
class profile {
private: int id,phone;
public:
void retriever() {
cout<<"Enter your ID: ";
cin>>id;
cout<<"Your Phone number is "<< phone;
};
}
avoiding formats in above class, purpose is to store data already in txt file with different id and phone numbers and it is to be retrieved by matching id number to txt file and viewing its related phone number.
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Sep 26, 2013
I am trying to fetch data from the USB device(say pendrive) connected to the USB port of a system. I have attached code.c file which I have wriiten for the same purpose, please find it. Here I am able to open the device file and read some random raw data which is in the log.txt file (also attached to this mail). But I want it to fetch data like minicom/teraterm does.
What methods and libraries I can use to do it successfully and how can it be done.
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Mar 14, 2013
How to write a C or C++ program that extracts certain numbers out of a section after the 4, 5 and 6 space.
For Example:
The output file will produce:
[ [1900 00 0 -2.000000 0.650000 0.006000 0.020000 2.274000 0.010000 54 0 0.7 10.8 1 0 0 0.000000 17.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 18];...
So I want to extract the numbers 0.650000, 0.006000, 0.020000 because those are the 4,5,6 space after [ [
Another problem I have is that the output file I showed will always being updated constantly for instance as follow:
[ [1900 00 0 -2.000000 0.650000 0.006000 0.020000 2.2054000 0.010000 10 0 0.7 10.8 1 0 0 0.000000 17.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 13];...
[ [1900 00 0 -1.000000 0.650000 0.006000 0.020000 2.694000 0.010000 9 0 0.7 10.8 1 0 0 0.000000 17.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 10];...
[ [1900 00 0 -2.000000 0.6023000 0.04000 0.050000 2.2454000 0.010000 5 0 0.7 10.8 1 0 0 0.000000 17.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 12];...
And it will keep updating like this and I want to update the previous numbers I extracted with now the new numbers after the 4,5, and 6 space.
So I have to write a code to let it know when it encounters [ [ start looking for the 4,5,6 space and get those numbers and once it reaches ;... that's the end of that section so re-look for the next section of numbers after the 4,5,6 space.
The file will be a text file or matlab file that is always being updated with these sections of numbers. Can I make this a #include<nameoffile.h> or does .h not work with a file that is always being updated.
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Mar 26, 2013
I'm having issues trying to input data from a .txt file into my array program. The whole program takes the name, # of goals and assists, adds them together to get points, and then puts in a given + or - rating. The program works except for the data input.
Also, this is an alphabetical "Unsorted" list, but is there a way to order the list based on point value and be able to display that as well as a separate "Ordered" list?
#include <iostream>
#include <iomanip>
#include <fstream>
#define NUM_PLAY 30
using namespace std;
int buildArrays(int[], int[], int[]);
void printArrays(string[], int[], int[], int[], int);
[Code]...
And this is the .txt file. Order is Players Name, Goals, Assists, Plus/Minus rating. The points are added when points = goals + assists (Should be in the main coding above).
Bryan_Bickell 2 5 +2
Brandon_Bollig 0 0 0
Dave_Bolland 4 2 -1
Sheldon_Brookbank 0 0 -1
Daniel_Carcillo 0 1 +3
[Code]...
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Jul 18, 2013
I am working on a project that uses a web service to extract a PNG image from a web server and save it on a local machine. It's done via a system call. I can get the output of the system call to a FILE but it appears to be losing data, most notably the PNG chunk names (IHDR/PLTE/IDAT/IEND, notably). (Unfortunately piping the output to an exterior file does not work through a system call.) The end result is ~6KB smaller than the file I am intending to retrieve.
This is the code I'm using (adapted from other material I found via searches here):
ofstream png;
png.open(/*outputfile*/, ios::binary);
FILE* fp = _popen(/*SYSTEMCALL*/, "rb");
string responseString;
if(fp != NULL) {
char a[100];
while(!feof(fp)) {
fgets(a, 100, fp);
responseString += a;
}
}
_pclose(fp);
png << responseString;
Am I missing something or just doing it wrong?
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Mar 21, 2014
I have an assignment that wants me to better understand how certain calls like malloc() and free() work. I'm supposed to have one function that allocates a pool of memory for the program to use (this is the only place where I'm allowed to use the malloc function. Anyplace else is off limits, except when allocating space for data structures.) Another function needs to be defined that allocates memory from this large pool of memory that we have already allocated. A third function needs to free a block of memory when a call from function main is made and a fourth does something else (haven't gotten that far yet.) I'm not sure if it's ok or not, but I'll attach the pdf form that describes all the requirements. If that's not ok, I'll delete it.)
Anyways, when thinking of data structures to use for this particular problem, one doesn't jump out at me as being THE data structure that would be most useful. How I would imagine using it is to store the addresses currently being used as well as the block length of those addresses (so basically, each node of the linkedlist would have a pointer that points to an allocated address and another field that told the size of the allocated block of memory.) How to communicate to the large pool of memory that a certain block of memory has been allocated and shouldn't be used until a free is made on that specific block of memory.
Attached File(s)
pa3.pdf (61.07K)
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Feb 11, 2014
I have written a CFD program that final results store at several 2D arrays. For instance, temperature of a square plate. For every point of plate i and j (i,j), I have a temperature amount. On the other hand, these temperatures change by time.
theSpace.TheCells[i, j,0].Temperature
I would like to save these data into an excel file and each sheet contains data for specific time (for example, an excel file with 50 sheets that cell number shows the coordinate of a point and the value in it is the temperature and next time step data's will be in the next sheet of current workbook )
I was thinking my code should be something like the following note, but it doesn't work:
// Implement time loop
int counter = 0;
for (int step= 1; step<= MaxSteps; step++) {
// call Excel output method
ExportData(ResultsArray,step,nx,ny);
[Code] ....
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