C++ :: Move A Character Around 2D Map?
Mar 3, 2013
How can I move a character around a 2D map? After some research and a bunch of work I made a function for movement:
unsigned int gamespeed = 100;
unsigned int stage = 1;
void controls()
{
[Code]....
Maps are stored in a different .cpp file
So this code works, but is complicated, ugly and evil (I have to make a pointer to the first map and change the pointer to the next map every time the user reaches the exit, without the pointer this code is, of course, incompatible). How can I reduce this code to be less evil/ugly or at least smaller?
Also it would be nice if the user could move around with arrows as well as with WASD
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Jan 27, 2015
I want to move a character in a 2D array This Character should move vertically in a 2D Array To exemplify it for Exam in Snake Game A character automatically moves Please Write a example code that works
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Sep 14, 2014
I keep getting this warning message and I do not know how to fix it. Is it because I'm using char to instead of strings to replace all 't' with 'lp'?
#include<iostream>
#include<string>
#include <stdio.h>
using namespace std;
char * scanf(char * a) {
[code]....
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Jul 25, 2012
Double values are stored in text file. 23.5 36.8 34.2 ... My teacher told me to read them character by character and then make words, like i have to read "2" "3" "." "5" and now have to make it or treat it as word and then using atoi(). I have to convert it into double. but i dont know how to do this....
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Nov 10, 2013
I have to optimize a code for below scenario. I am reading stdin (a file redirected to stdin) character by character. How many chars are going to come is not known. After every few chars there is a seaparator. e.g $ as below
rhhrkkj$hghjhdf$ddfkrjt
While reading, if the separator arrives I'm processing the string stored before that separator and then continue reading stdin in same fashion, till EOF. I am using getc(stdin) to read chars.
Using gprof I can see most of the program time is spent inside main() , for this reading logic. Rest of the program is just some insert and search operations. I am getting time of 0.01 secs at the moment, want to reduce further.
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Aug 10, 2012
How do I write an a program that will read an input file character by character?
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Oct 6, 2013
In my program, I'm supposed to read a text file (the name of which is given to me as a command line paramater, as long with an integer), and display the text in a specific format (each line can only be as long as the integer). However, I'm having trouble even reading the text file. I don't know the syntax. I'm only allowed to edit the function that does the formatting, and the code in that is
void typeset (int maxWidth, istream& documentIn)
I don't know how to 'read' the file, as most examples online are ifstream, or openFile or something like that. What I want to do is just read the first character of the file, and continuously keep reading characters until the end of the file.
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Sep 13, 2014
So I'm trying to create a function that replaces any instance of a character in a string with another. So first I tried the replace() string member function:
In my implementation file
void NewString::ReplaceChar(const char& target,const char& entry)
{
this->replace(this->begin(),this->end(), target, entry);
};
Main program
#include "NewString.h"
using namespace ...;
int main()
[Code].....
Instead of replacing the the l's with y's it outputted a long string of y's. Also, NewString is derived from the string class (it's for the assignment). the header and whole implementation file, already tested.
I've also tried, instead, to use a for loop in ReplaceChar() but I need to overload the == operator and I don't know how I should exactly:
bool NewString::operator ==(const char& target)const {
if(*this == target)
return true;
[Code]....
I want the == operator to test if the value in the char array is equal to target but I'm not sure how to pass in the position. I'm guessing the this pointer in ReplaceChar() is not the same as the one dereferenced in ==() because target is never replaced by entry in the string.
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Feb 24, 2014
After I enter in the 8 digit account number the program just stops and I can't find where the logical error is
Code: #include <iostream>
#include <iomanip>
#include <string>
using namespace std;
bool validateLength(string);
bool validateDigit(string);
void calculateA(string);
void calculateB(string);
void calculateC(string);
bool validateService(string);
[code]......
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Apr 20, 2013
Having trouble getting my square to move to the left my code and instructions of what i am suppose to do is below. No sure how to move my square or if I am even going in the right direction as to writing code to do so. Note that it is only part of my code ( part 2 of project)
Part 2:
Write a graphical application that draws a square and then moves it.
Get the x and y coordinates for the top left corner of the square from the user using the get_int() member function of cwin. Get the length of a side of the square from the user using get_int() as well. Now draw the square to cwin according to the user input.Ask the user how many units to the left they want to move it using get_int() again. Then move the square, clear the screen, and draw it again.
// Part 2 //
/* command output to declare the x,y value and 1 side length of a square through user interaction( Has user input intergers) */
int x_value = cwin.get_int("What is the x_value of the top left of the square?");
int y_value = cwin.get_int("What is the y_value of the top left of the square?");
int side_length = cwin.get_int("Input the length for one side of the square:");
/* Data type for the 4 corners of the square */
Point e;
Point f;
[Code]...
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Mar 5, 2013
My objectives for this program is to open and read a file "dict.txt" which has the following data:
4
dog
pepper
marker
teapot
It needs to rotate the inner letters one to the right so you'd end up with "mrkear" etc, and then write those words into a new file "scramble.txt" one per line.I'm having a lot of problems understanding the program. Compiling is giving me a lot of warnings/errors.
Code:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAXW 10 //max number of words in file
#define MAXS 81 //max size of string
}
[code]....
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Dec 6, 2013
I am doing a checkers program in C and were not allowed to use standard C99. Things are going relatively well so far. I have 2d array that acts as a matrix for my board and have ways to check if a space is empty and if it is occupied by a specific players chip.
Right now I have a giant messy method that I will split up sooner or later but Im just trying to understand and build the logic. It looks like this:
Code:
void isValidMove(int origin, int dest, int player) {
int rowDiff = abs(origin%8 - dest%8);
int possibleMoveLeftUp = origin - 9;
int possibleMoveLeftDown = origin + 9;
int possibleMoveRightUp = origin - 7;
[Code] ....
So although its not pretty i think the logic is sound. I can tell whether or not a player is attempting to make a move or a jump. I haven't implemented make_move() yet but thats no problems. My biggest deal is that I need to find a way to tell the user he has to jump if its available. I feel like this is a very difficult task for me to grasp and is more about algorithm logic and math then the C language which is what the course is for.
So, how I could loop through all of a specific players chips and see if that player has an available jump. Also if he does then the jump has to be taken and then checked again as if there is another legal jump then it needs to be taken as well until their are no jumps left. Of course there could be 2 routes available, but I think I could deal with that if I just could come up with a reasonable way of checking....
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Feb 7, 2013
How can I move data from one file to the another file without using pointers.
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Jan 13, 2015
how I want my sprite movement to work: if my sprite is faced upwards and i press W, it will move up. If my sprite is faced to the right and i press W, it will go right. etc. // It doesn't work like that right now and how to do it.The sprite's rotation works fine.
if(sf::Keyboard::isKeyPressed(sf::Keyboard::Q)) {
playerSprite.rotate(-0.08 * dt);
} else if(sf::Keyboard::isKeyPressed(sf::Keyboard::E)) {
playerSprite.rotate(0.08 * dt);
[code]....
My question is how do I move the character depending on the rotation?
Also, you might see the "if(havePlayersCollided == false) {playerSprite.move(yadiyada)}" . yes i dont need the haveplayerscollided function because it doesnt work the way I want it to. I might make a thread for it in the future, but right now I need to get the rotation movement fixed before I move onto the collision detection between players.
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May 29, 2014
I am working on a bonus question for school. By using #include <iostream> and #include <string>, I need the user to input a sentence getline(cin,sentence). Move the first word of that sentence to the end.
example:
Enter a line of text.
MAC101 is the class
rephrased that line to read:
is the class MAC101
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Dec 3, 2013
How to move a character (an arrow or any other character) on screen using keyboard? I'm actually a beginner and have only wrote simple (starter's) programs in C++. It would be great without using any external library which is not included in C++ by default (in other words, using plain C++).
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Apr 3, 2014
I was wondering if there is way to convert a C# class to its own project and it automatically keeps its references.
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Apr 10, 2014
How to move a rectangle in TabPage ?
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Apr 29, 2013
What c++ code can be used to make an 'X' move through a maze. I have some code, but I'm not sure where to go from there. I have divided the program into three files, A header file, a main file and a .cpp implementation file.
In my implementation file I have:
#include "Maze.h"
Maze::Maze() {
} void Maze::mazeTraversal(char maze[][COLS], int row, int col, int direction) {
enum Direction {DOWN, RIGHT, UP, LEFT};
switch(option)
[Code] ....
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Feb 13, 2013
i draw some object (polygon , triangle , etc.. ) and i want to move them from side to side automatically and from keyboard ...
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May 17, 2012
I have a data-bound ComboBox and I populate a DataSet with the values returned from a SQL query.
public DataSet CompanyArray(DataSet dataSet) {
SqlConnection connection = InstancesTest.IDataInterface.DefineConnection();
SqlCommand command = new SqlCommand();
command.CommandText = "usp_CompanyArray";
command.CommandTimeout = 20000;
[code]....
All this works fine. The reason I populated it in an array was so that I could sort the items alphabetically. I know I could just do an "order by" in SQL but I chose this route.
What I'm after is putting a "Please Select" at index 0 in the ComboBox. How can I move this value to the top of the list, without reordering the sorted list?And I don't really want to insert a "Please Select" as a first row in a database table.
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Feb 17, 2012
Is there an algorithm in the STL to move elements similar to how std::copy works? I have read various places that the new C++ standard has a move algorithm. Unfortunately the compiler I use (g++ (GCC) 4.2.0) does not support any C++0x updates.
I have a std::deque that I want to move a range from into an array. I am currently using something like this where
data_array is an unsigned char pointer to a buffer being passed in by the caller
dataQ is a std::deque<unsigned char> that is a member variable maintained within the class
Code:
for (int i = 0; i < numberBytesRequested; ++i) {
data_array[i] = dataQ.front();
dataQ.pop_front();
}
I'm concerned that executing this loop over and over again is going to be very inefficient.
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Mar 26, 2012
How do I tell c++ to move the mouse in place x?
for example, I run a c++ program and the mouse moves to the top left corner of my screen.
How do I go about doing something like that?
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May 5, 2013
I am unable to understand how a move constructor works in this example of code. If someone could break down the process of what is taking place and explain to me on why to use a move constructor.
Code:
class MyString {
MyString(MyString&& MoveSource) {
if( MoveSource.Buffer != NULL ) {
Buffer = MoveSource.Buffer; // take ownership i.e. 'move'
MoveSource.Buffer = NULL; // set the move source to NULL i.e. free it
}
}
};
Example from "SamsTeachYourself: C++ in One Hour a Day"
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Jul 27, 2014
I am trying to resize a bmp image by FACTOR times. I got the width resize working correctly but for the height I need to print each row of pixels or 'RGBTRIPLE' FACTOR number of times. I am pretty sure I have the fseek line in the right spot (marked here) I just don't know how many bytes to move it by I tried 1 I though 1 byte past the end would move the pointer to the next line but that did not work. This is for a class so please no code. Here is my code.
Code:
#include <stdio.h>
#include <stdlib.h>
#include "bmp.h"
[code]....
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Jan 22, 2013
I have created a sphere, inside the sphere (cell) is another smaller sphere (nuclei) located at one end and at the other end of the sphere is a structure call microtubules.The microtubules had a center point and then there are line that extend from the point to the edge of nuclei and also to the edge of the cell.
I have points (viruses) that move throughout the cell. Once the virus is on the microtubules structure ( assuming it attaches to the structure from the cell edge), it must move towards the center of the microtubules and eventually move down the line towards the nuclei.
I have already figured out how to determine if the virus is on the microtubules structure however I cant figure out how to move it down the line. I figured it out in 2D space using the quadrant system, but I cant wrap my head doing it in 3D space.Once the virus is on the microtubules how do I update the coordinates to move it towards the center and then towards the nuclei?
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