C++ :: How To Implement A Grid Made Of Hexagons
May 8, 2015
implementing a game of chess, i was able to easily implement the grid with an 8x8 multidimensional array.but here is the case I need to implement a grid made of hexagons(six sided but in future may be seven sideded or eight may be needed): like a beehive something.
How can such a grid be implemented in c++ taking notes of coordinates and borders and stuff? From where i can start working from? this grid has to be just like the chess grid only we got six sided boxexs instead of four,
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Apr 18, 2014
If I create a file that looks like this for example,
car 2 4 6 8
truck 1 2 3 4 5 6
plane 4 5 6 7 9
Whenever I go to open it back up like this,
ifstream inputFile;
string line;
inputFile.open("file.txt");
while (inputFile>>line) {
cout << line << endl;
} inputFile.close();
return 0;
}
It displays output like this,
car
2
4
6
8
How can I get it to display like above?
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Mar 7, 2013
You are given an integer, perhaps a very long long integer, composed of only the digits 1 and/or 2. You have the ability to change a 1 digit into a 2 and a 2 digit into a 1 and must determine the min. number of changes that you can make resulting in no 2 digits remaining in the number that are in a position(in terms of powers of ten) higher than any 1 digit.
example:
2222212 number of changes:1
1111121 1
2211221 3
1122112 2
no negative numbers.
how to get started. Also I'm not allowed to use anything related to arrays or sorting.
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Oct 2, 2013
I want to monitor a text file. So far what I have is the program reads and prints the names in the file to standard out. When the program reaches the end of the file, it closes.
I want the program to stay active and continue to print names as they are saved to the text file.
I was toying with FindFirstChangeNotification function, but it seems that returns a handle so I'm back to the drawing board.
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Feb 13, 2014
I want to make an encapsulated surface class that keeps track of important aspects about a surface. I have it started, except when I test the .onDraw() function, nothing appears on the screen. My Code is below:
#include "NSurface.h"
NSurface::NSurface() {
surface = NULL;
}
NSurface::~NSurface() {
SDL_FreeSurface(surface);
[code]....
why nothing is blitting to the screen when I test that class.onDraw() and SDL_Flip(screen)?
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Feb 8, 2015
I want to know how to respond to a request made by a mobile application (preferably Android) through a desktop software. So for example if there is a button on the mobile app named 'do something and a user clicks it, I want the desktop software to respond to that request and 'do something
So what I was thinking was to upload a file to a server when the button on the app is clicked and add a timer to the desktop software to connect to the server and read the file and respond accordingly.
Is this how it is usually done or am I going about this the wrong way? Im developing the app in C# (Xamarin) and the desktop software in C# as well.
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Nov 25, 2012
Running c in jgrasp.. i am getting error has gcc not found.
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Jan 6, 2015
I am supposed to convert a string made of many numbers between every number spaces are between, to an integer variable for every number..
How am I supposed to get over this problem?
Example: String: " 322 52 231"
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May 3, 2014
Is it possible in C to instantly react to keystrokes made in console?For example, consider the following code:
Code:
#include<stdio.h>
int main(int argc, char *argv[]) {
char ch;
printf("Enter a sentence...
");
[code]....
The evaluation of the if statement inside the loop will not occur until the Enter key is pressed on keyboard.To my best understanding, It just pushes the keystrokes to some buffer, and when the '' is introduced, it evalutes the characters one by one.Is there an elegant way to instantly react to keystrokes in C?
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Jun 19, 2014
I dont know anything about filestreams. I want to record the files that the customer bought, total, cash and change.
Here's my code.
// Create a program that will initiate a purchasing system for registered agents in an agency.
#include<iostream>
#include<windows.h>
#include<conio.h>
#include<fstream>
#include<string>
using namespace std;
void password();
[code]....
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Apr 25, 2013
I am doing a c project .it is a system that stores the name of txt format reports made by students and opens them.
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Sep 30, 2014
I have a client/server program. My Client process spawns my server process using a `fork()` and `system()` call. The client and the server are meant to communicate to each other through named piped, that is a requirement of my homework. The client and the server are supposed to initially send a message to the other one, through a pipe, to confirm that a connection is made. My issue is that my client is trying to open one of the named pipes before the server has a chance to make it. This doesn't always happen though. Occasionally, it will run fine. Is there some way to synchronize this?
My overall goal is to get a filename and search target from the user, send those to the server through a named pipe. And the server searches for the target and sends info back.
OUTPUT:
Client: PID 2986 - Running on Tue Sep 30 20:59:28 2014
Client: PID 2986 - Enter File Name: largeSampleText.txt
Server PID 2988 - Running on Tue Sep 30 20:59:32 2014
Server: PID 2988 - Synchronized to Client.//This means the client-to-server fifo is working
There was an error opening serverToClientfifo//This means client couldn't open the server-to-client fifo
error is: 2//This means the fifo doesn't exist yet
[Code] ....
CORRECT OUTPUT:
Client: PID 2542 - Running on Tue Sep 30 20:58:44 2014
Client: PID 2542 - Enter File Name: largeSampleText.txt
Server PID 2557 - Running on Tue Sep 30 20:58:54 2014
Server: PID 2557 - Synchronized to Client.
[Code] ....
RELEVANT CLIENT CODE:
int main() {
char requestedFileName[1024];
//Get initial information on the client
pid_t clientPID = getpid();
time_t currentTime = time(0);
char* stringTime= ctime(¤tTime);
[Code] ....
I tried creating both of my fifos in my client and my output changed to this
Client: PID 3150 - Running on Tue Sep 30 21:23:17 2014
Client: PID 3150 - Enter File Name: largeSampleText.txt
Client: PID 3150 - Enter Target:
Server PID 3153 - Running on Tue Sep 30 21:23:21 2014
was
Client: PID 3150 - Input File >>>largeSampleText.txt<<<
Client: PID 3150 - Target >>>was<<<
Client: PID 3150 - Synchronized to Server
Server received unexpected connection message
Message: was
Terminating
So It appears like the client went ahead and put `requestedFileName` and`requestedTarget`into the pipe and the server read out `requestedTarget` instead of the connection message. Not sure why though
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Jul 9, 2014
I was going through Singleton design pattern and get to know that objects can be created only by static function of that class and constructors are make private.
My question is, why assignment operators are not made private through which we can create a copy of already existing object.
I tried below code and assignment works, so I have new object sc3. I know that its referring to memory of sc1 but finally I was able to create object without using static function.
Also, why copy constructor not made as private.
Below is code:
#include <iostream>
using namespace std;
class Singleton {
private:
static bool instanceFlag;
[Code] .....
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Feb 20, 2013
Write a C program that calculates the final value of an investment made in a TSX Market Linked GIC.
Specification
The return on this type of GIC (Guaranteed Investment Certificate) is based on the initial investment, the number of years (1, 2 or 3), a minimum return rate, a maximum return rate, a participation rate, the values of the TSX (Toronto Stock Exchange) index at specified intervals during the years, and the type of averaging of these values. The final investment value can only be calculated once all the TSX values are known.
If averaging is not used the TSX rate is determined from the opening and closing values only. If averaging is used the TSX rate is determined by calculating the TSX average at 6 monthly intervals, then is based on this average relative to the opening value. The TSX rate is then multiplied by the participation rate. If this new rate is below the minimum rate, then the minimum rate is used, and if it is above the maximum rate, then the maximum rate is used. Rates are printed to 2 decimal places, and the final investment is rounded down, and formatted using commas.
Only round down for the final investment. If the TSX rate is negative do not print the line for rate adjusted for participation. Assume that the final investment is less than one million dollars. (Hint: if you need to print leading zeros in a number, use the %0m.n format: example - the format specifier %06.2f prints 4.56 as 004.56)
Example 1: See below; averaging is not used, so TSX rate = (107-100)/100 = 7%. After using a participation rate of 80%, get 5.6% (which is between min & max rates).
Example 2: See below; averaging is used over 5 values to get a rate of 68% which equals 54.4% due to participation. This is more than the max rate, so the max rate is used.
The GIC calculator must use the following layout exactly.
+------------------------------------+
| TSX MARKET LINKED GIC CALCULATOR |
+------------------------------------+
Enter initial investment : 1000.00
Enter number of years [1,2,3] : 3
Enter minimum and maximum rates [%] : 1 20
Enter participation rate [%] : 80
Enter if averaging used [1=yes,0=no]: 0
Enter open and close values : 100 107
TSX rate . . . . . . . . . . . . . . 7.00%
Rate adjusted for participation . . 5.60%
Final investment . . . . . . . . . . $ 1,056.00
+------------------------------------+
| TSX MARKET LINKED GIC CALCULATOR |
+------------------------------------+
Enter initial investment : 2000.00
Enter number of years [1,2,3] : 2
Enter minimum and maximum rates [%] : 1 20
Enter participation rate [%] : 80
Enter if averaging used [1=yes,0=no]: 1
Enter 5 TSX values : 200 190 320 430 540
TSX rate . . . . . . . . . . . . . . 68.00%
Rate adjusted for participation . . 54.40%
Maximum rate is applicable . . . . . 20.00%
Final investment . . . . . . . . . . $ 2,040.00 i wrote something like
Code:
#include <stdio.h>
int main (void)
{
int years, minimum, maximum, partrate, x, open, close, tsxvalue;
float investment, tsxrate, y, finalinvestment, maxrate, minrate;
printf("+------------------------------------+
[Code] ....
I don't know what the exact calculation should be here now to get the rest....so I'm stuck here
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Mar 4, 2012
Code:
class A
{
std::map<std::string, Unit*> aMap;
class B
[Code] .....
This code snippet results in "A non-static member reference must be made relative to a specific object". When I make callA() static, this error goes away, but there is problem with aMap.
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Jan 13, 2014
I'm trying to extract data from a grid, it's a Dev Express grid. I have got an object which if I hover over it in debug mode shows me the data I'm after. In the code below if I hover over "row" I can drill down through "Row" and then "ItemArray" and I can see the data I want in an array but I can't find how to get at it.
private void gridShowUsers_Click(object sender, EventArgs e)
{
Object row = gridView1.GetFocusedRow();
string [] rowarray = new string [50];
[Code].....
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Aug 8, 2014
Code: There is a rectangular grid of numbers. The grid has m rows and n columns. So it has m*n cells in total.The rows are numbered from 1 to m and the columns are numbered from 1 to n. The top most row has number 1, the row next to it has number 2 and so on. Similarly, the left most column has number 1, the column next to it has number 2 and so on. Each cell in the grid has a unique coordinate which is (x, y) where x is the row number and y is the column number of that particular cell.
Each cell in the grid has an integer in {0, 1, 2, 3, 4, 5, 6 ,7 ,8}. Number in cell (x,y) is number of mines in neighboring cells (cells have at least 1 common vertex with cell (x,y))
Your task is to find grid of mines, i.e display an m*n grid of numbers {0, 1} (cell (x, y) is 1 if there is a mine in cell (x, y)).
Input
First line of the input contains two space separated integers, m and n. Next m lines, each line has n numbers in {0, 1, 2, 3, 4, 5, 6 ,7 ,8}.
Output
A grid of numbers {0, 1}
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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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Aug 15, 2014
I'm stuck on printing my grid from my class file to the main file.If I pull out the print code and put in on the actual main program, it prints, but if I try to put in the class methods and call the function from main, I get an error.
testfile.cpp
#include <iostream>
#include <vector>
#include <string>
#include "DUPoint.h"
#include "Grid.h"
using namespace std;
[code]....
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Apr 1, 2013
I have a map that is full of 4+ rooms each with one randomly selected door on one of its sides. I need to create a tunnel connecting all of the doors together. I'm not sure the best way to do this A* seems to complicated for me to do at the moment and I cannot think of a way to connect these rooms.
My world is currently a vector<vector<Tiles>> and the tiles contain entities like tunnel, wall, stair, floor, etc.
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Apr 9, 2014
How do you use a stored procedure with a WebGrid? Our coding standard say we cannot write sql statement directly in the code to include HTML.
[var Grid = new WebGrid(DB.Query("Select * from Menu")]
The above call must be a call to a stored procedure.
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Sep 30, 2013
So my program is to check if a certain 9x9 sudoku grid is valid. i have to get the input through command argument. so for example.
./a.out sudoku.txt
So we have make my c program to use FILE I/O open and what not
program behavior must be as follow File does not exist.File contains something other than a sequence of 81 integers (too many, too few, non-int).
One or more of the values is not in the range 1..9 Violation of Sudoku rules (this is the big one!) In case 4, you should report the violation (or any one of the violations if there are multiple -- you do not need to exhaustively enumerate all violations).
For example: Row Violation: entries (2,2) and (2,6) are both equal to 7. (Similarly for column and box violations). All i know is that i need to make a 2d 9 by 9 array
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Aug 27, 2014
Write a menu driven program that will fill grid with values between 1 and 100. Begin the program by declaring a array of type int. Then present the user with the following menu
Enter 1 to add
Enter 2 to edit
Enter 3 to delete
Enter 4 to search
Enter 5 to display
Enter 0 to Quit
Each item of the menu must be implemented as a function. The program should Only allow values between 1 and 100
Always ask the user to apply coordinates for the cell to be changed
Flag an error when try to delete or edit a cell with a zero (0)
Flag an error when try to add to a cell that is not blank
Display the complete and nicely formatted grid when option 5 is selected
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May 1, 2014
I have to make a grid 40 X 40 with random numbers 0-9. I have already done this and it prints out great. My problem is I need to be able to choose a row number and output the sum of the number in that row. Here is what I have so far.
#include <iostream>
using namespace std;
int main(){
int Values[40][40];
int rows, cols;
[Code] ....
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Mar 21, 2014
I am trying to draw a 2d grid array for a battleships game. I need the grid to have a border around each cell, how to do this. so far my code is:
#include<iostream>
using namespace std;
int main(){
int grid[5][5] = {{0}};
[Code] .....
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Nov 11, 2014
I have been trying to bind an xml response from a web service to a gridview but to no success. bellow is my code
soapInvoker.setMethod("GetAgentProducts");
XDocument AgentproductsRequest = SoapMethods.GetAgentProducts(pin);
XDocument AgentproductsResponse = soapInvoker.CallSoapServiceInternal(AgentproductsRequest);
XDocument xmlDoc = new XDocument(AgentproductsResponse);
var vrresult = from a in xmlDoc.Descendants("product")
[Code] ....
And I always get an error that is not explained dont know whether is coz i bootstrapped my master page or what but all errors caught where there are it shows this Runtime Error
Description: An exception occurred while processing your request. Additionally, another exception occurred while executing the custom error page for the first exception. The request has been terminated.
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