I've been working on making a class that makes turning any variable or object into a byte array and vice-versa, quick with minimal pointer interface.
As well as a function for turning any variable or object into a binary text string.
Code:
#include <iostream>
#include <bitset>
#include <sstream>
// Convert a Variable to a Byte Array
template <class var>
unsigned char* VarToBytes(var &data) {
[code].....
This problem is best explained by looking at its output below. I stored 15 different values but when retrieved some are wrong.
#include <iostream>
using namespace std;
class A {
public:
int ** pointer;
[Code] ....
I need to store and retrieve the 15 different values correctly. How to solve this? The main thing is, I need to store the pointer in class A objects.
This program compiles, but has a bunch of logical errors. I know my problem is somewhere in the while loop that I have, but I can't figure out where. Here are some of the issues I am experiencing:
1. At the beginning of the program it asks you to enter a number, and when you do it does nothing while proceeding to the while loop where I have it asking the same question
Code:
"Please enter a number between 1 and 20 (Enter 0 to stop)
";
cin >> num;
cout << endl;
I want to be able to eliminate that first statement but if I only run this in the loop without the above statement the program will display nothing on the screen and proceeds to stop.
2. This code runs fine, except that if you make a mistake, it will prompt you to enter a valid number, however; it ignores your first response if the number you enter is valid and asks you to enter a valid number anyway. Once you enter it a second time, it will accept it and the program will continue on.
Code:
while(num != SENTINEL) {
cout << "Please enter a number between 1 and 20 (Enter 0 to stop) ";
cin >> num;
cout << endl;
Also if you type in 0 on your first response, it will prompt you that it is not a valid number and ask you to try again, instead of stopping the program like it is supposed to do. On your second response the program will accept your 0 and stop the program correctly.
//Write a program that displays the roman numeral equivalent of any decimal number between 1 and 20 that the user enters. The roman numerals should be stored in an array of strings and the decimal number that the user enters should be used to locate the array element holding the roman numeral equivalent. The program should have a loop that allows the user to continue entering numbers until an end sentinel of 0 is entered.
Input validation: Do not accept scores less than 0 or greater than 20
#include <iostream>
#include <string>
using namespace std;
int main() {
// Declare constants and variables
const int romanNum = 21; // Size of the elements in the array
[Code] ....
How can I separate byte array and put nibbles in a new array?
when I try following:
byte in[]={0xab,0x11,0x22,0x33,0xbb};
byte out[10];
void seperatebyte(byte* input, byte* output) {
for(int i = 0;i<sizeof(input);i++) {
output[i*2] = (input[i] >> 4) & 0xf;
output[(i*2)+1] = input[i] & 0xf;
}
}
seperatebyte(in,out); //gives output of
10 11 1 1 184 1 184 0 0 0
I expect 10 11 1 1 2 2 3 3 11 11
I basically want to create a save editor application that will enable people to alter various values in the save by clicking on releveant buttons and then also for the editor to auto update the checksum when changes are done.
The save file is in hex so from what I can gather I would need to create a button to open the file using 'open file dialogue' and then read the file into a byte array so that the values can be called at any time when a particular butto is pressed and the application will then seek to the point in the file to make the required changes.
I have an application that has its own embedded web server. I am trying to add jQuery/Ajax file upload capabilities to the application however, I am running into issues getting the posted file. The jQuery/Ajax portion is similar to this method here. Due to the way the webserver was written (its in a dll and I do not have access to the source), the posted file comes in as a byte[]. If I try to save the byte array directly to file using:
File.WriteAllBytes("path", ByteArray)
I end up with a corrupt file that I cannot open. I believe this is because the byte array also contains the posted file header info (Content-Disposition, name, filename, etc.). If I view the contents of the byte array using:
System.Text.Encoding.Default.GetString(ByteArray)
the header info can be viewed as:
------WebKitFormBoundaryQfPjgEVpjoWgA5JL
Content-Disposition: form-data; name="0"; filename="someimage.png"
Content-Type: image/png
‰PNG
Based on the selected file size and the size of the byte array, the entire file is in the byte array. How can I go about extracting and saving the posted file from the byte array?
I'm trying to understand why a conversion from a byte array (unsigned char) to a double works when done one way and not antoher.
In the example code I test by hard coding an unsigned char array of the same bytes that the double consists of.
When I copy the bytes to a long long and cast to double the result is not the original double but if I use a struct the bytes can be set and the conversion happens.
Seems to me that both ways should work. I'd just like to know what is going on with the "struct way" that makes the conversion correct. I see in debugger that the bytes in memory are the same for piAsLong and u.bytes.
My compiler is VS 2012 and a long long and double are both 8 bytes (tested with sizeof). This is learning activity only.
Code:
#include "stdafx.h"
#include <iostream>
#include <iomanip>
using namespace std;
union {
double d;
[code]....
I'm having trouble reading a block of bytes into a vector of short ints. My code is as follows:
Code:
FileStream.seekg(2821);
vector<short> g_Data;
int iter = 0;
g_Data.reserve(maxNumOfInts);
[Code] ....
The relevant block of data starts at offset 2821 in the file. Every two bytes are a signed short integer. What's odd is that it's giving me the correct results only part of the time. At offset 1052421 and 1052422 there are two bytes 40 and 1F that are correctly read in as 8000, but at offset 1052415 and 1052416 bytes 88 and 13 are read in as -120 instead of 5000.
I don't see anything wrong with my code, though, unless I'm misunderstanding completely how to convert an array of two bytes into a single float. Is my method correct? Better still, is there some way to just convert en mass an array of bytes into a vector of signed short ints?
I'm trying to parse some binary data in the form of an array of bytes and I've come across something that is confusing me related to the representation of data as chars versus ints. It's a bit of a long story, but the byte array contains a mixture of character data and integer data which I' having trouble unravelling. The problem seems to arise from the issue below:
Code:
const char * ch_arr = "abcd";
const unsigned int * ui_arr = (const unsigned int*)ch_arr;
cout << ui_arr[0] << endl;
unsigned int ui = 'a';
ui = ui << 8;
ui |= 'b';
ui = ui << 8;
ui |= 'c';
ui = ui << 8;
ui |= 'd';
cout << ui << endl;
I expected both the output lines to be the same, since they contain the same bytes (I believe), but I get:
Code:
1684234849
1633837924
I am trying to store each char of a string(string a ="1100") into a byteArray ( byte[] byteArray = new byte[4]. its not showing any error but its storing like below:
byteArray[0] = 49
byteArray[1] = 49
byteArray[2] = 48
byteArray[3] = 48
and what i want is
byteArray[0] = 1
byteArray[1] = 1
byteArray[2] = 0
byteArray[3] = 0
I don't know why but its replacing 1 with 49 and 0 with 48.what am I doing wrong or how to do this?
my code is as below
byte[] byteArray = new byte[4];)/>
int binArrayAdd = 0;
string a ="1100";
foreach (char Character in a)
{
byteArray [binArrayAdd] = Convert.ToByte(Character);
binArrayAdd++;
}
- API Function
TestSend(ref char data, ref int len, char slot);
---------------------------------------------------
Byte[] IccSelect = new Byte[7]{
0x00,
0xA4, // INS
0x04, //1 0x00, //2 0x0E,
0x31,
0x50,
};
Int32 len = 20;
TestSend(ref ??, ref len, '0');//byte array to char conversion
i need to search for a keyword in a binary(.raw)file and have to extract the characters(until a '&' character is found)that immediately following the keyword .
View 1 Replies View RelatedIn my application there is a structure that holds 200 parameters for 200 tests. These structure is converted to byte array . I want to write this byte array to a file in save button and when I click open button, this file must open and write these bytes to corresponding text boxes. How it possible.?
View 1 Replies View RelatedI m loading a png image by using the ATLImage library.
CImage Image;
Image.Load (L"D:ImagesPNG_ImagesImage7.png");
how to retrieve the byte array value of this png image. I tried retrieving it as
byte *png = reinterpret_cast<BYTE *>(Image.GetBits());
but when i access the data , der is a loss of data while converting it in the above manner.
I found a snippet in net for decoding the raw data . but der is a line is the code which is unknown to me. The code is as follows :
CImage atlImage;
HMODULE hMod = GetModuleHandle(NULL);
atlImage.Load(bstr);
void* pPixel = atlImage.GetBits();
intpitch = atlImage.GetPitch();
intdepth = atlImage.GetBPP();
[Code] ....
How do I get the byte * value form the png image loaded?
I like to Draw an Image Using two dimensional byte array[512][256].
I used SetPixelV method to plot the image.
But Its very slow & hidden some buttons(Controls) at run time in the same dialog.
For reference i send some code,
Code:
for(row = 0; row <512; row ++)
{
for(col = 0; col < 256; col++)
{
Data[row][col] = y;
SetPixelV(d, 10+row, 10+col, RGB(Data[row][col],Data[row][col],Data[row][col]));
}
}
I am trying to use C# with C++, two different applications that work together.
In C# it is easy to get a byte array out of a string, by just using Encoding.Default.GetBytes(of-this-string);
I can pass bytes to my C++ program by just writing in the embedded resources. But this won't allow strings, as far as I know it can only be a byte array. C++ reads the embedded resources a LPBYTE.
So I try to send the string or message in byteform.
However the problem in C++ is that there is no Encoding.Default.GetString(xxx)
Would there be any other ways to send a message/sentence in bytearrayform and request it in C++ back to the original string?
let's say I have an IntPtr that points to the raw data of System.Drawing.Bitmap. is there any way to create a byte array from that IntPtr without copying the data? I'm a pretty experienced C++ programmer, so I can call ToPointer() on it and convert to a byte* to work with it as a pointer, which is no big deal for me, but using a pointer and doing pointer arithmetic increases the risk of bugs, so I'd prefer not to do it that way if there's another way.
View 4 Replies View RelatedI tried to convert byte array with hex to equivalent decimal value as follows but it gives me unexpected results:
byte hex_arr[] = { 0x00, 0x01, 0xab, 0x90};
unsigned long i=0;
i = hex_arr[3] + (hex_arr[2] << 8) + (hex_arr[1] << 16) + (hex_arr[0] << 24);
the output is 4294945680
Correct output should be 109456
but when I try with byte hex_arr[]={0x00,0x00,0x0f,0xff};
it gives correct out put 4095
the correct output works until the hex values is {0x00,0x00,0x7f,0xff}
I have this code:
const BYTE original[2][4] = {
{0x00, 0x00, 0x00, 0x00},
{0xFF, 0xFF, 0xFF, 0xFF}
};
void function(const BYTE** values){
[Code] ....
You might notice that the above code doesn't compile, this is the error:
cannot convert parameter 2 from 'BYTE [2][4]' to 'BYTE *'
1>
Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
Even after some search I couldn't really find an answer to my problem, how do I pass the const BYTE array which I declared above in the function as a parameter (or what structure do I need to set for the function as a parameter)?
In my project I'm using PVOID pointer to store real time data. After getting this data I will convert the data into byte array, like below
Code:
byte *bPoint = NULL;
PVOID pvData;
byte TempArr[1024];
bPoint = (byte*) pvData;
for(int i=0;i<1024;i++)
TempArr[i] = (byte) (*bPoint + i);
Processing time for the above code takes 9500 to 9900 microseconds (Used QueryPerformanceCounter).
Code:
TempArr[0] = ((BYTE*) pvData) [0];
This code takes 1100 to 1200 microseconds. My doubt is, The processing time of PVOID data into byte array conversion takes time like above? Or any other easy way(PVOID data into byte array conversion) to reduce the processing time?
I have an example where I have a variable belonging to a base class, but I would like to tell the compiler that it actually belongs to a derived class. How can I do this?
// base class: R0
// derived class: R1
// see function SetR1 for the problem
class R0 {
public:
int a;
[Code] .....
I am trying to access a variable from another class through another class but it is not returning its "instance"?
Example:
Class View
Code:
...
V3D_Viewer viewer;
...
Class MainWindow
Code:
...
viewer* myView;
myView = new viewer();
...
Class Test
Code:
...
MainWindow window;
window.myView->setBackgroundColor(WHITE);
...
I am new to c++ references and pointers,
I know my current program will not compile. How can I store the the start temperature so it can be used again in the final printf statement "start degrees Fahrenheit is converted Celsius."?
Note - I want to use the float data type for precision.
Code:
//THIS PROGRAM WILL CONVERT TEMPERATURES BETWEEN DEGREES FAHRENHEIT AND DEGREES CELSIUS
#include <stdio.h>
int main(void)
[Code].....
I'm trying to make a program that takes up to a seven digit binary number and converts it to its decimal equivalent. I'm still a beginner, so this might be a simple question but how do I stop the user from entering anything but 1s and 0s? This means no decimals or numbers other than 1 or 0.I already made it so it won't accept anything below 0 or above 1111111.
View 1 Replies View Related#include <iostream>
#include <math.h>
using namespace std;
int main() {
int N=0, counter=0, counter1=0,counter2=0, temp=0, temp1=0,dec=0,result=0, moder=0;
[Code] .....
This is Binary to Decimal Converter. It's not working. Although Dry Run of this program works fine.
I am writing a program that converts arabic numbers into roman numerals.
Quote Write a program that asks the user to enter a number within the range of 1 through 10. Use a switch statement to display the Roman numeral version of that number.
Input Validation: Do not accept a number less than 1 or greater than 10.
Prompts And Output Labels. Use the following prompt for input: "Enter a number (1 - 10): ". The output of the program should be of the form "The Roman numeral version of A is R" where A is the Arabic numeral entered (1,2,3,...) and R is the all-capitals form of a Roman numeral, such as VII.