C++ :: Map - How To Get The Key Of Element By Position
Sep 21, 2013I have a "fairly" large, std::map. Is there a way, to get the key of an element, by position? E.g., something like,
map.at(i).getkey
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Visual C++ :: Reading Character Symbols On Lines Of Text Position By Position?
Mar 4, 2013What I have to do is write a small program in C++ to parse the symbols that are used on 5 different lines of text in each position until position 30 is reached on each line. The goal of the parsing program is to interpret the symbols (characters), if there are any per each position, on the 5 lines of text in order to output the actual data that the group of symbols represents.
My question for is this: Is there anything special from a C++ environment that should go in to something like this outside of using standard stuff like the math associated with the search algorithm that has to happen here? The symbols are located in a file, so I know I have to include "iostream" and a few other headers. But outside of header inclusions and the code necessary to iterate and streamline the search and interpretation process, am I missing anything special that I couldn't otherwise find through simple google searches?
C++ :: Linked List - Function Which Deletes Element If Next Element Is Bigger
Mar 10, 2014So I have linked list and function which deletes element if next element is bigger, so my code is working but its not working with first element, in the comment I have wrote code which I would code for checking that first element, but when ever I check it is blowing up all program.
#include <iostream>
using namespace std;
struct llist {
int x;
llist *next;
[Code] .....
C :: Last Element Of List Overwritten By First Element Of Another
Feb 23, 2013I have a global list that contains smaller lists of char arrays. I have an issue where when I'm reading back the inner lists the last element of one list seems to point to first element of the next.
So my data looks like the below (values separated by commas with the pairs separated by tabs. The last pair in a line is the same as the first). When I read the first list back instead of seeing "456.678,678.98" as the last element in the list. I see "435.67,234.98" twice: at the end of the first list and start of the other. I have debugged when the list is populated and can see the correct values going in so I can't figure what's happening.
456.678,678.98 123.45,345.56 256.67,789.98 456.678,678.98
435.67,234.98 123.65,342.56 987.78,678.34 435.67,234.98
Code to fill the list:
obstacle_list = op_prg_list_create();
while (fgets(line, sizeof(line), obstaclePositions_traj_file) ) {
token = strtok(line, "
"); //Pull the string apart into tokens using the
input = op_prg_list_create();
[Code] ....
C++ :: Std List - How To Get Value Of Element 2 Minus Element 1
Aug 23, 2012I have an std list of type double.. and the list is always guaranteed to have just 2 elements. I need to get the value of element 2 minus element 1. What is the least amount of code to accomplish that?
I tried this:
Code:
list<double> dList;
dList.push_back(1.0);
dList.push_back(2.0);
list<double>::iterator iter = dList.begin();
list<double>::iterator iter2 = dList.end();
double result = *iter2 - *iter;
But this code does not work. Why not?
C :: Array Finding Position Of A Value?
Dec 24, 2013So for a project I'm working on, I'm using an array and generating it's values randomly but unique. Currently I'm working on a 3X3 array and the generated values are in the range from 1-9. So I wrote a function that will tell me the position of the cell whose value is 9. This is the function I wrote:
Code: void Llogaritje1(int t[3][3],int &i, int &j){
int y,l;
for(y=0;y<3;y++){
for(l=0;l<3;l++){
if(t[y][l]==9){
i=y;
j=l;
break;
}
}if(t[y][l]==9) break;
}
}
But it doesn't work on all cells. Seems like at cells t[1][0] and t[2][0] the values that i and j take are 0 0 since when I print them after excecuting the function that's what it returns. I really don't understand why.
C++ :: Get Iterator Position After Find If
Jan 25, 2013I want to get the iterator position after to use find if:
std::list<Texture*>::iterator result = find_if(
texturelist.begin(),
texturelist.end(),
std::bind2nd<CompareTEX>(CompareTEX(),n_tex));
if (result != texturelist.end()) {
return // position result
}
C++ :: Partial Tokenization From A Certain Position
Mar 14, 2013I have a string like:
char *origin = "THIS, IS, SPARTA!"
What I want to do is get all characters in a string up to a certain delimiter, for that I've searched I can do that with:
sscanf
getline
strok
But what I don't know and haven't found is how to use these functions but to start reading from a certain position in the string. So I need to get the characters up to a comma but after "THIS," so that would be starting in position 5...
How could I do that? I tried using [x] in brackets but then it would just read a character...
C/C++ :: How To Take Input From Particular Position Using Graphics
Feb 26, 2013I am new to grpahics progamming in/under Borland C. I have included the "graphics.h" header file but i am unable to take input on the screen. If I try to move my cursor to a specified position using gotoxy() function the pointer doesnt moves to the specified location and starts taking input at (1,1) coordinate.
View 1 Replies View RelatedC++ :: ID Followed By Object Identifier And Position?
Jun 4, 2014I need to keep a data structure, which has an id, an object pointer and a position. this id is used to randomize things, the object and the position is attached to this id. So which way is better?
Code:
struct data {
int id;
ObjectBase* obj;
Vector3 position;
};
vector<data> vecData;
or
map<int, pair<ObjectBase *, Vector3>> mapData;
C++ :: Relation Between Local Position And Distance
Feb 21, 2014i have two point P1 and P2 where i want to move P1 and P2 with keeping the distance and the position of the P2 relative to P1 i thought that when i keep the distance between the two point that involve keep in the same time the local position of P2 but when tested it does not work initial position of P1=(10.0f, 00.0f, 00.0f) initila position of P2 relative to p1 =(50,10,-8) we can get the global position of p2 ----- final position of P1 =(50,10,-8) final position of P2 in the world space =(40.31,8.06,-6.45) then we calculate the distance before and after we found that there are equal but when we calculate the position of p2 relative to p1 after and before we found that there are not equal.
how i can keep the local position and distance ?
C++ :: How To Display Item At Specific Tab Position
Nov 23, 2013I used VB6 before to output file.
I set my output to file to tab(20) or tab(45) respectively.
In C++, how do I do this?
C :: Find Character Position - Output 0
Jul 8, 2014I try to find charecter position but evey time i run my program it give me 0 position why ? Why in my getChar function give me warning statement with no effect i can not understand this warning where is my mistake.
Code:
void getChar(const char* str){
int lenStr = strlen(str);
int i = 0;
int posCharecter = 0;
printf(" %s has %d charecters length
",str,lenStr);
[Code] .....
C :: Linked List Insertion At A Particular Position
Mar 4, 2014I have been working on a program that records the time it takes the user to complete a maze. The user's time is then recorded and inserted into a linked list of structures based on the time (from quickest time to longest). I wrote some code that does this, but I was wondering if I can make the code more concise/make sense -- like only using two pointers or having less if statements.Here is a struct that are the elements of the linked list (I also have a global variable to keep track of the head of the list:
Code:
//stores player's best time.
struct PlayerTime {
char name[MAX_STR_LEN];
float seconds;
struct PlayerTime* next;
[Code]....
C :: Code To Return Value Of Bit At Position Bit Index
Jan 10, 2015Here's my code
bitIndex = 5;
Code:
bool getBS(PBitSet _this, int bitIndex) {
if(_this->bits & (1 >> bitIndex))
return true;
else
return false;}
I want this code to return the value of the bit at position bitIndex. It can be either false or true. The problem is, that it always returns false, even thought I enter 16 as my number, so the 5th bit should be true.
0000|0000 = 0
0001|0000 = 16
C++ :: How To Find Coordinates Of Cursor Position
Feb 4, 2014I have studied function,array,stuctures,flow of control(XI class cbse syllabus). Now I want to know how to find coordinates of cursor position in c++.
View 2 Replies View RelatedC++ :: SendInput - Cursor Position Wrong
May 12, 2013I recently wanted to create a (yet) simple program that simulates a mouse movement.So far I managed to make the program work. It does move the mouse, click when expected but the problem is the location it does click at.Here's my code:
#include <Windows.h>
#include <stdio.h>
int leftclick (DWORD x, DWORD y);
int main(){
[code]......
The problem now is: I want the program (for testing purposes) to click at (1920, 1080) and (100, 100) afterwards. Now it does click within a specific range. When I use GetCursorPos to retreive the cursors position it differs quite a bit from where I expected the click to be.
a second question I have is: When I declare the following flag (in the code above) the program does use relative coordinates even though it shouldn't.
input.mi.dwFlags = MOUSEEVENTF_ABSOLUTE | MOUSEEVENTF_LEFTDOWN | MOUSEEVENTF_LEFTUP;
Where as it works out well when I add a MOUSEEVENTF_MOVE to it.I couldn't find any solution to this in Microsoft MSDN or any other website.
C++ :: How To Find Position Of Certain Character In String
Jan 11, 2013I need to find position of certain character in string, so i made a function but it doesn't do what i thought it would.
Consider this string:
std::string line = "<foo> <foo> <foo> <foo> <foo>"
I need to find position of a third '>' character so i can get:
std::string other = "<foo> <foo> <foo>";
This is my function that fails:
std::size_t find_third(const std::string& line) {
std::size_t pos = 0u;
for(std::size_t i = 0; i < 3u; ++i) {
std::string tmp = line.substr(pos);
pos = tmp.find_first_of('>');
} return pos;
}
C++ :: Mouse Coordinate Position In Window
May 3, 2014After searching on stackoverflow I got this
POINT p;
for (int i = 0;; ++i) {
HWND hwnd = GetConsoleWindow();
system("cls");
if (ScreenToClient(hwnd, &p)) {
//p.x and p.y are now relative to hwnd's client area
} cout << p.x << " " << p.y;
Sleep(200);
}
I'm looking for a function that gives current mouse position(x and y) in that particular console window. I've tried above code but it is not working.
C++ :: STL Regex Get Position Of Match Within String
Apr 18, 2013I am trying to get the position of the matches of "Un" in string "Unseen University" in c++ code using STL regex. How can I do this.
i.e. I have following:
std::vector<std::cmatch*>* matches = new std::vector<std::cmatch*>*;
intMyReturnVal = regex("Unseen University", "Un", matches);
I can access a match by
matches->at(i)
and get an Iterator to the beginning of the match by
matches->at(i)->begin()
How can I get the relative position of the match within the entire target string (i.e. "Unseen University", where, in this case, the positions should be 0 and 7)??
C# :: Getting Current Mouse Position In WPF Application?
Feb 27, 2015I have set a variable as follows:
Point clickLocation = new Point(0, 0);
But when I got to use
clickLocation = Cursor.Position;
It gives me an error of position does not exist? Does WPF not support this way?
C/C++ :: Get The Position Of A Selected Item In A ListBox
Jul 21, 2014I've a winapi listbox with a bunch of entries, I'd like that when the user click on an entry, the entry number will be saved on an integer variable.
View 3 Replies View RelatedC/C++ :: Delete Value At Nth Position In Linked List
Sep 30, 2014#include <iostream>
#include <string>
#include <fstream>
#include <iomanip>
using namespace std;
struct ddpl{
string author, title, show_title, choice, user_name, borrowed_book_title, borrowed_book_author;
[Code] ....
I don't know how to do this if this was deleting by position would have been easier, but the user don't know and don't have to know the position of every book in the list it should delete the books by there title and i'm kinda lost of the delete function at line 47 and particularly at line 55 and 62, it kind difficult to traverse with the values or the data of the node for the position is simpler.
C/C++ :: Swapping Of Position Of Elements In A Sequence
Oct 24, 2013Write a program that gets a sequence of unsigned integers.the user can enter at most 100 integers.
After getting the numbers, the program allows the user to repeatedly choose one of the three options:
1. swap the location of two entries in the sequence. if this option is chosen the user is prompted to enter the two locations to be swapped.
2. print out the sequence.
3. repeatedly swap two locations in the sequence until getting back to the state before this operation started. then print out the number of swaps performed.
C/C++ :: Resetting File Pointer Position
May 10, 2013it will search the whole file once then i cant get it to reset without restart the program.
cin >> paycode;
while(paycode!=0) {
while(!infile.eof()) {
infile >> search;
infile.ignore(1);
[Code] .....
Visual C++ :: MFC List Control Position?
Feb 4, 2015I have a mfc project with a List Control (Report View).
When I run the project, the list control appears in the middle of the window instead of appearing where I placed it.
Is there a qay to make it stay where I need it?