C# :: How To Draw More Than One Line In WPF Using Array

Jul 8, 2014

I used the following code. I called a method named lets_draw

private void lets_draw() {
int i,z;
z = 40;
Line[] line = new Line[20];
for(i=1;i<=10;i++) {

[Code] ....

But it showed the following message

"An unhandled exception of type 'System.NullReferenceException' occurred in SkeletalTracking.exe
Additional information: Object reference not set to an instance of an object."

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C++ :: Dialog Based Application - Draw Line Inside Picture Box

Feb 24, 2014

I create the dialog based application and draw the line inside the picture box. if line is drawn then display the msgbox, if not close the msg box and resize the window then the line is disappear and blank area is shown in picturbox.blem

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C++ :: How To Draw Unoccupied Value From Array

Jan 5, 2015

Let's say there are three slots in my array (3 pieces of hardware to be used). If one worker comes in, it takes an instrument, and I tag it as used on random basis. Next, the next worker comes in, it takes another unused instrument randomly and so on. When the first worker finishes using that instrument, he returns it back to the inventory. How should I write such code in C++?

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Visual C++ :: How To Draw 2D Array Of Data In MFC

Jun 3, 2013

I have a circle of data that is represented as:

vector<vector <unsigned char> >* data;

The first dimension of this vector is the angle of the data so there are 360 angles, and the second dimension is the bins of the data in which there are 512 bins per angle. Each bin has a value from 0 to 15 to determine the intensity of the bin. So basically, when this is all display, there will be a circle of data, with varying colors of intensity at each bin.

What is the best approach to doing this in MFC? How to draw this on the screen?

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Visual C++ :: Draw Image Using 2D Byte Array?

Feb 8, 2013

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]));
}
}

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C :: How Can A Multi-line String Be Read Line By Line

Mar 7, 2014

How can a mulitline string be read line by line

ex: str = "PERIOD="week"
DAY="day"
TIME="time"";

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C++ :: How To Put End Of String Mark At The End Of Each Line In Array

Oct 28, 2014

Basically I am writing a program that will ask the user to input some names and then I will sort the names. However, right now when I input the characters, it prints out everything, including the empty spaces. How do I put an end of string mark at the end of the line, when the user hits enter

void main() {
constintMaxNames(20);
constintMaxLetters(15);
charNames[MaxNames + 1] [MaxLetters + 1];
intNumRows;

[Code] .....

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C :: Pointers Array De-allocation And Input In A Line

May 24, 2013

I have three questions concerning the below code I have written, which is expected to do basically as the attached diagram illustrates:

Code:
#include <stdio.h>
#include <stdlib.h>
double getAverageGrade(int studentGrades[] , int size);
int* getStudentInfo(int * numCourses);
int main()

[Code] ...

(1) How may I display the averages to 2 decimal places, namely why doesn't %.2lf work? The program gives 89.00 for 89 and 90, for instance.
(2) How may I read the number of courses and the relevant grades in a row for each student?
(3) How may I free (de-allocate) my array of pointers, namely grades? Does it suffice to use free(grades)?

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C++ :: Input Elements Of Two Dimensional Array In Same Line

Nov 4, 2013

I want to input the elements of a two dimensional array in the same line . So while giving input . when i press enter . it should remain on the same line ? HOW to do that ?

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C/C++ :: How To Put A Line Of Text File Into Array For Encryption (AES)

Apr 23, 2014

I am writing a program for AES Encryption which is all but done as far as that the program encrypts the text and prints the encrypted text in the command prompt:

void main() {
int a;
unsigned char CipherKey[16] = {0x2B, 0x7E, 0x15, 0x16, 0x28, 0xAE, 0xD2, 0xA6, 0xAB, 0xF7, 0x15, 0x88, 0x09, 0xCF, 0x4F, 0x3C};
unsigned char PlainText[16] = {0x32, 0x43, 0xF6, 0xA8, 0x88, 0x5A, 0x30, 0x8D, 0x31, 0x31, 0x98, 0xA2, 0xE0, 0x37, 0x07, 0x34};
for(a=0;a<16;a++)

[Code] ....

Encrypted text output on command prompt = 39 25 84 1d 02 dc 09 fb dc 11 85 97 19 6a 0b 32

However, my project asks to "read blocks of data from a data file". Therefore I need to alter the main function to read the following arrays from a data file.

Unsigned char CipherKey[16] = {0x2B, 0x7E, 0x15, 0x16, 0x28, 0xAE, 0xD2, 0xA6, 0xAB, 0xF7, 0x15, 0x88, 0x09, 0xCF, 0x4F, 0x3C};
unsigned char PlainText[16] = {0x32, 0x43, 0xF6, 0xA8, 0x88, 0x5A, 0x30, 0x8D, 0x31, 0x31, 0x98, 0xA2, 0xE0, 0x37, 0x07, 0x34};


Firstly, I don't know how to take each individual part in the data file to store into each byte in the array i.e. 0x2B into CipherKey[0] of the array.

Secondly, How do I deal with the fact that each byte is in hexidecimal? How should my data file look?

this is what my data file Input.dat looks like at the minute:

0x2B, 0x7E, 0x15, 0x16, 0x28, 0xAE, 0xD2, 0xA6, 0xAB, 0xF7, 0x15, 0x88, 0x09, 0xCF, 0x4F, 0x3C
0x32, 0x43, 0xF6, 0xA8, 0x88, 0x5A, 0x30, 0x8D, 0x31, 0x31, 0x98, 0xA2, 0xE0, 0x37, 0x07, 0x34

The first line being the CipherKey array and the second being PlainText. I'm not sure if the '0x' or the commas are required.

I basically want to take the data from a file, store them in arrays in the program itself, encrypt the Input array PlainText and create a new file with the encrypted output array stored in it (I will deal with this part of the program after I get the input file done first).

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C# :: Printing All Values Above The Diagonal Line In 2D Array

Apr 11, 2014

I need to print all the values in a square 2d array that are above the diagonal line. So if I have this 6x6 array for instance:

{0,0,0,0,0,0},
{1,1,1,1,1,1},
{2,2,2,2,2,2},
{3,3,3,3,3,3},
{4,4,4,4,4,4},
{5,5,5,5,5,5}

I'd have to print the elements in italics. I've tried this:

for (i = 1; i < a.GetLength(0); i++) {
for (j = i-1; j >=0; j--)
Console.Write("{0,-2}", a[i, j]);
Console.WriteLine();
}

with the array mentioned above but for some reason it keeps printing the elements BELOW the line, when I need it to print those above it. I know that for arrays we usually start loops with a value of 0 but seeing as there should be nothing to print at [0,0] I started the loop at 1.

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C :: ANSI Program To Print Out Each Command Line Argument On Separate Line Using For Loop

Mar 5, 2013

I need to write a ANSI program to print out each command line argument on a separate line using a for-loop. also it need to print the name of the executable .so far I have

Code:

#include <stdio.h>
int main(int argc, char **argv) {
int i;
printf("")

[code]....

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C :: Program Which Writes Out Its Command Line Arguments In Reverse Order One Per Line?

May 7, 2013

l need to write a program which writes out its command line arguments in reverse order one per line. The output from the program should look like this:

% a.out Two roads diverged in a yellow wood
wood
yellow
a
in
diverged
roads
Two

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C++ :: How To Draw A Polygon

Nov 16, 2013

I am fairly new to c++, and I want to be able to draw a polygon. When I have searched for how to draw one, the only thing i can find is scripts doing things like this:

*
**
***
****
*****

I doubt that c++ is that primitive, and I'm looking for something like the c++ equivalent of this python script:

Syntax: draw.polygon((20,20)(30,30)(50,30)(20,40)(20,20), fill(green))

I am using a mac os 10.9

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C :: Function To Store Command Line Arguments In Array

Feb 1, 2015

In class, we have learned how to set up the main method so we can convert command line arguments to integers and utilize them. Here is an example of a method we learned to store command line arguments as integers in an array:

Code:
int main (int argc, constchar* argv[]) {int i;
int a[argc - 1];
// Fill the array with the arguments on the command line
for (i = 0; i < argc - 1; i++){
a[i] = atoi(argv[i + 1]);

[Code] .....

I understand that there are probably better ways to do it than using the atoi function, but for our purposes, the professor said this was okay.

Now, I am being asked to create a separate function to perform the same task (store integers in an array). I was told I would need to declare the array "out in the main program", and that the function would need to take at least 2 arguments: an array, and an array size.

Firstly, what should my return value be? My professor gave a hint that it would be important for me to figure out what the return value is, but I don't see why it would be anything else than void.

Also, wouldn't I need a third parameter? Perhaps the integers that are being stored in the array? (But how would I represent this as a parameter)?

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C++ :: Creating Template Of Array To Use For Classes Line And Point

Jun 14, 2012

I want to create template of of Array in order to have possibility use this template for classes Line and Point.

Code:
// Array.h
// Templated Array class containging Ts
#ifndef Array_H
#define Array_H
template <class T=double> class Array {

[Code] .....

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C :: Reading A File Line By Line (invalid Write Of Size X)

Aug 17, 2014

I am trying to read a file line by line and then do something with the informations, so my method looks like this:

Code:
void open_file(char *link) {
FILE *file = fopen(link, "r");
if (file == NULL) {
fprintf(stderr, "Could not open file.
");
exit(EXIT_FAILURE);

[Code] ....

1) The first complain of valgrind is at the line where I use fgets and its telling me (invalid write of size x), but I have allocated my line to 56000 and the read line is shorter, why is there a write size error then :S?

2) at the line where I realloc where I try to shrink the space he's telling me: Address .... is 0 bytes inside a block of size 56000, But I know i need only this space so why is there a write over space error :S??

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C :: Reading A File Line By Line And Storing It Backwards Into A List

Sep 25, 2013

So I'm reading a file line by line and storing it backwards into a list. So if the file has has this format...
1
2
3
4

The code should store each line in a list as such...
4, 3, 2 ,1

Instead the code will store the last variable in all nodes. So the final list will look like this...
4, 4, 4, 4

Here is my code...

struct node *head = NULL;
int i;
while(read(in, &i, sizeof(int)) != 0) {
struct node *temp = malloc(sizeof(*temp));
temp->line = &i;
temp->next = head;
head = temp;
}

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C :: Copying File Line By Line Using Dynamic Memory Allocation

Jul 15, 2013

I need to read lines from one file and copy them line by line into another file using dynamic memory allocation. It compiles but gives me a seg fault. Why/How?

Code:
int main(){
FILE *fp1;
FILE *fp2;
FILE *i;
fp1=fopen("file1","r");
fp2=fopen("file3","w+");

[Code] ....

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C++ :: Comparing End Points Of One Line With The Start Point Of Adjoining Line

Feb 11, 2014

There are numbers of lines connected to each other. I've extracted the line start point and end points but i am confused how to compare the end point of one line with the start point of adjoining line.

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Visual C++ :: Line Graph Using Single Line Values From Bitmap

Feb 3, 2014

I was loaded a bmp file in my mfc window and stored rgb data in a file.My image size is 320x240.

Is possible to pick a single point (location) from that bmp image (Not the whole window)?

i like to plot a line graph using the pointed single line data using the stored file data?

here R is X Axis and G & B is Y Axis.

If i have 2D array of data means how can i plot the line graph?

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C :: Make Array Stop Reading From Input When It Hits A New Line?

Nov 25, 2013

I want the numbers to be put into the array until it hits a new line. Maximum number of numbers is 1000. What can I replace that while loop with to stop it from reading further into the input file?

Code:

while (input != '
'){
for(i=0; i<1000; i++)
fscanf(ifp, "%lf", &auctions_prices[i]);

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C :: Draw A Grid Using The Characters?

Aug 20, 2013

I'm trying to create a grid using the following characters: !, @, #, $, &.

It's an 8 x 8 grid, and should contain the characters in no particular order (trying to create a Bejeweled-like game).

I already defined the width and length to be 8, so:

#define WIDTH 8
#define LENGTH 8

Code:

void makegrid(char grid[])
{
int j;
int k;
for ( j = -1; j < LENGTH; j++ )
{
for ( k = -1; k < WIDTH; k++ )
{
/* I don't know what to type here anymore :( */
}
} }

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C++ :: OpenGL - Draw On Top Of Image

Jun 22, 2014

This is my first time using opengl and I am experimenting with adding/drawing polygons/points/etc. on top of a PPM image. The image is already loaded when the application runs. My attempt to draw a square is from lines 30 - 35. The program runs but the square is not present. Just the image.

#include<windows.h>
#include <stdio.h>
#include <stdlib.h>
#include<Gl/gl.h>
#include<GL/glut.h>

int n;
int m;
int *image;

[Code] ....

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C++ :: How To Draw A 3D Snake In OpenGL

Jan 3, 2014

i want to draw a 3D snake in opengl.. i can't get nothing out of my search to make a start.. how it is made

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C++ :: How To Draw Lines With Different Colors

Nov 8, 2014

I want to write a function called DrawLineSegments.This function must change the color of lines at every corner where the corner angle is greater than 60 deg (Assume that there is a function called checkangle). The color sequence must be black, red, green, blue, and repeat this sequence after the fourth color.

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