C++ :: Extracting Polynomial Coefficient From String
Nov 30, 2013I want to extract polynomial coefficient out of a string recieved by input, for example if i enter 4x^3+2x^4+3 , the resulting out put be : 2 , 4 , 0 , 0 , 3
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C++ :: Extracting Numbers From A String
Dec 5, 2014So, I have a string and I need to extract numbers from it. I've tried different things but they are not working. So, Here is what I have:
int main() {
string myString;
char *strPtr;
cout << "Enter a string to evaluate: " << endl;
getline(cin, myString);
[Code] ....
C++ :: Extracting Decimal Numbers From A String?
May 16, 2014Extracting integers from a string is trivial, but I am unable to find a function or code that will extract decimal numbers from a string.
I have a string that looks something like this:
" Asdf 1 1.3825 4.0000 12.0000 1.9133 0.1853 0.9000 1.1359 4.0000 "
Any tips on extracting the numbers (in decimal form) and storing them in a vector?
C++ :: Extracting String From Text File
Jun 5, 2014I have a program here that writes employee information into a text file called employee.txt. I don't have a problem writing into the text file.
I'm supposed to enter the employees ID and search for it. Then pull up all they're info.
This is what I have.
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
int main(){
ifstream inFile;
ofstream outFile;
[Code] ....
This is the text file
Viktor,Luc,552,123 Home,5000
Joe,Luc,553,123 House,7000
C :: Adding Two Polynomials - Degree And Coefficient
Jan 13, 2015This program should add two polynomials, but for some reason, it just asks for polynomial degree and it's coefficients, then, it just stops
Code:
#include <stdio.h>
#define MAX 100
typedef struct polinom {
int n, cl[MAX], st[MAX];
[Code] ....
C++ :: Generate Numbers For A Binomial Coefficient From Number Interval
Mar 27, 2013I'm trying to write a code which will generate numbers for a binomial coefficient from a number interval [2-10], i think it should look like this:
n=2
r=2
n=2
r=3
n=2
r=4
n=2
r=5
.
.
.
n=10
r=10
-The program should stop here.
This is badly written, but it still has the basic idea in it.
#include <iostream>
using namespace std;
int main () {
int n=2;
int r=1;
[Code] ....
C :: Value Of A Polynomial In A Point
Jan 3, 2015I don't know why this doesn't work. It doesn't return any errors, but it does the polynomial equation wrong. I tried using "^" instead of "pow" and it still does it wrong. I'm getting results like "-897123897" instead of "3". This is the code:
Code:
#include <stdio.h>
#include <conio.h>
#include <math.h>
int main()
[code]....
C :: How To Get Derivative Of Polynomial
Nov 12, 2014How to get the derivative of a polynomial.
Code:
#include "p.h"#include <stdio.h>
#include <stdlib.h>
/*----------------------------------------------*/
/* Sets all coefficients to 0 */
/*--------------------------------------------- */
void initialize(Polynomial p)
[Code] .....
C++ :: Compute The Value Of A Polynomial
Mar 27, 2014This program is supposed to find the value of a polynomial
with x being the number of terms
a[x] being the coefficients
b[x] being the exponents in each term
j being the variable
for example if
x=4
a[x]=1,2,1,5
b[x]=3,2,1,0
j=2
then the polynomial is (j*j*j)+2(j*j)+j+5
the value will be 23
however the value computed is wrong in the code below
#include <stdio.h>
#include <math.h>
int main()
[Code].....
C++ :: Identify Polynomial With Two Arrays Of Same Length
Oct 15, 2014I wanna write a class for polynomials, but there are some bugs in my code. I want to identify a polynomial with two arrays of the same length, one that contains the exponents of the nonzero monomials, and the other that contains the coefficients itself.
for example: (shematically)
3x^2 +5x^100 shoud be identified by array1=(2,100) and array2=(3,5)
the size of that polynomial should be Dim=2.
it should be possible to change the size dynamically.
Code:
#ifndef poly
#define poly
#include<cassert>
class poly {
[Code] ....
PROBLEM1 the destructor isnt working:
virtual ~poly() {delete [] start;delete [] koef;} //destruktor
Error: This declaration has no Storage class or typ specifier.
Error: Expected an identifier.
PROBLEM2 the constructor isnt working:
poly::poly(int x=0)
Error: Expected an identifier
Error: Expected a )
Error: Expected a ;.
I dont know what the computer want to tell me??
C++ :: Program That Will Calculate Minimal Polynomial?
Apr 20, 2013I need to make a program that will calculate minimal polynomial of the nxn matrix.
View 1 Replies View RelatedC/C++ :: Simple Polynomial Derivative Calculator
Feb 27, 2014So I'm trying to make a derivative calculator that can do simple polynomial calculations in a very specific way. If you read the cout line you'll understand rather quickly.
#include<iostream>
#include<cstdlib>
#include<string>
#include<cstring>
using namespace std;
struct variable {
char Variable,degree,constant;
[Code] ....
I get an error at line 33 and 37 saying error: request for member '_cstr' in 'constant', which is of non-class type 'char'
and the same line with 'degree' instead of constant.
C/C++ :: Define Polynomial Using Linked List
Mar 18, 2014I'm try to write a program which define a polynomial using a linked list.
1) I fill every node of the list which list is as long as the value of the max power of the polynomial.
2) I print it out the resulting polynomial.
3) I want to re-scan the poly in search for the polynomials with the same index and sum them each other for having only one element with the same index, for instance, if I enter P(x) = 1 + x + x^2 + 3*x^2 + x^3, I want to obtain:
P(x) = 1 + x + (1 + 3)*x^2 + x^3.
I called this function SeekForSameIndex().
But with this example I have 4x^2 + 4x^2 + x^3, losing the firsts members of the expression, I'm behind this problem for days and I do not understand where's the mistake.
Here my code:
#include <stdio.h>
#include <stdlib.h>
struct SPoly {
int coeff;
unsigned int index;
[Code] ....
C :: Implementing And Manipulating Polynomial ADT Using Linked List
Sep 23, 2014Implementing and manipulating a Polynomial ADT using a linked list.
So far I have:
poly_ADT.h
Code: typedef struct nodeT{
int coef;
int powr;
struct nodeT *next;
} node;
[Code]...
I need to create a function that creates the polynomial using input first.
poly *poly_create (num,...) ;return a new polynomial with num terms terms are listed in order of lowest ordered-term to highest. i.e., to initialize poly 15x^6 + -9x^4 + 3x^2 call poly_create(3, 3,2, -9,4, 15,6 );
Once I do that I need to implement various functions that can manipulate the polynomial itself but I'm having trouble just with creating the polynomial itself, how to do that using a linked list and nodes?
C :: Extracting Second Row From Array?
Mar 1, 2015I'm having trouble trying to extra the second row from the array:
Code: double data[10][10] = {{0,5,10,15,20,25,30,35,40,45},{0,13,22,37,54,62,64,100,112,126}};
When I do this, it posts the entire array:
Code: int x,y;
for(x=0;x<2;x++)
{
for(y=0;y<10;y++)
{
printf("%.0lf ",data[1][y]);
}
}
C :: Program Doesn't Properly Compute Simple Polynomial
Feb 7, 2014The program will ask for the user to enter a value for x, then compute the following polynomial: 3x^5 + 2x^4 - 5x^3 - x^2 + 7x - 6.However, when I double check it with my calculator I get a wrong answer for random values of x. To simplify my problem I'm using only integers.
Code:
#include <stdio.h>
int main(void)
{
int x, polynomial;
}
[code]...
C++ :: Polynomial Objects - Deep Copy And Operator Overloading
Feb 22, 2015In main I instantiate two Polynomial objects -- p1 and p2:
int main() {
const int SIZE = 3;
Polynomial *p1 = new Polynomial(SIZE);
Polynomial *p2 = new Polynomial(SIZE);
//Read data into p1
std::cout << "Initialize Polynomial Coefficients (1)" << std::endl;
[Code] .....
The implementation file for Polynomial is as follows:
Polynomial::~Polynomial() {
delete [] this->m_Ptr;
this->m_Ptr = NULL;
} Polynomial::Polynomial(int size) {
[Code] .....
What works: Adding two pointers. The output is correctly produced.
The problem in particular occurs in main when p1 and p2 are attempted to be multiplied. The code attempts to release the memory upon multiplication but I receive a run-time error.
The output for the difference of the two polynomial objects is incorrect. It is displaying addresses.
C++ :: Extracting File Name From Path?
May 17, 2013I have a string like this
const char *filename = "C:/Qt/progetti/worlds/fasr.world";
then I have a string like this
char *pathdir = "C:/Qt/progetti/worlds";
I would get this string: "worlds/fasr.world" how should I do ?
C/C++ :: Extracting Strings From Files
Feb 15, 2013We have an assignment to produce code to gather a string of input from the user in which they are entering a date. We then have to extract parts of that string to make substrings, and display different formats for the date(I will add my code in here so you can see what I have done). It took me a long while plucking away at this to understand this part. You will see that at the end of my code I have opened a file months.txt. We were provided with a file which states months corresponding to dates. I.e. 01January 02February 03March 04April, and so on until December. Exactly how I have typed it is how it is in the file.
I understand how to open and extract what is in the file as a string. I have extracted this as a string called myMonth (as you can see in the code as well) NOW,
I am supposed to have the program search for the month in the file, matching that to the month the user has input earlier, and then use the number infront of that month. I understand the basics of using find(), and making substrings. But how on earth do you get the computer to correlate what the user has input for a month, to finding that in the file, and then using the correct number.
Here is the code I have done so far:
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
int main() {
string myDate; // Date input from user;
string myMonth; // Input from months.txt
[Code] ....
C/C++ :: Extracting Information From Data File?
Apr 20, 2015Create a simple data file like the example shown below containing the 4 dates below plus 10 or more additional dates. The file should include 1 date per line and each date should have the form MonthNumber-DayOfTheMonth-Last2DigitsOfTheYear with no extra spaces. All dates should be in this century. No error checking for invalid dates is necessary.
My Output displays like
February -19,1991
How do I get my program to ignore the dash between the dates?
#include <fstream>
#include <iostream>
#include <string>
#include <cmath>
using namespace std;
int main(){
const int M = 13;
[code]....
Visual C++ :: Extracting Stuff From IHTMLDocument2?
Feb 20, 2013I got as far as getting a web page into an IHTMLDocument2 but I don't know what to do from there, all the examples I found are C# or .NET or something else I don't understand.
Any simple example in C++ of getting all the links from an IHTMLDocument2 ?
I was able to do this:
Code:
IHTMLElementCollection* collection;
hResult=document->get_links(&collection);
long nLinks;
collection->get_length(&nLinks); // returns correct number
collection->Release();
How do I loop through the collection and extract the actual links ? Also, if they come out as BSTR do I simple treat them as WCHAR* ? If I can do that I can figure out the rest myself.
Visual C++ :: Extracting Time Stamps From PDF?
Apr 26, 2013I am trying to automatically extract all time stamps in a pdf file. These are typically in a line like:
when="2010-07-30T15:20:30+04:00"
For this I was thinking of using CStdioFile and the ReadString function. Somehow this doesn't work. My example code is below. Is this because pdf is not a true text file, because strings read can be longer than some max,...? Any quick way of reading the file and extracting the desired text between the brackets?
Code:
CStdioFile InputFile;
if (InputFile.Open(FileName,CFile::modeRead)) {
[Code]....
C++ :: Polynomial Coefficients Are Memorialized In Field Of Real Double Precision Numbers
Mar 19, 2013I am starting to learn C++.Designing class CPolynom to work with polynomials. The polynomial coefficients are memorialized in the field of real double precision numbers. Implement the following functions:
-Constructor, which defines the order of the polynomial CPolynom(int order)
-method to add the appropriate grade Coef(int exp, duble coef)
-method of addition, subtraction, multiplication and division two polynomials
-method to add a field coefficient
-method for nala
C :: Decrypting / Extracting Custom File Formats
Sep 25, 2014So this may be against the rules, not sure, grey area probably? However I just bought the PC game Oil Rush, and was having a look at how the assets are packed. As with most games the textures, scripts, sounds and audio are all free to access.
However the game data such as maps, models and other, are packed into UNG files, i.e a custom encrypted file format, which probably is also compressed. So I googled for an unpacker/extracter and found one which also comes with the C source. You can download here. [URL] ....
So I am trying to figure out how these authors work out this file format, from the source we have,
Code:
static const u8 unigine_mask[] = "xffx7fx3fx1fx0fx07x03x01";
u32 unigine_key = 0xa13cdbde;
Looks like a password of sorts. You then have to work out the complete understanding of the file formats, headers, blocks etc.. How is this done...
C++ :: Extracting Nibbles (Number Represented In Binary)
Nov 29, 2013If I have a number 117, represented in binary as : 01110101 and I wanted to grab the top nibble. What would be the decimal value I would be extracting?
Would it be 0111 or 0101 decimal values 112 or 5 or is my understanding completely wrong?
Visual C++ :: Assigning Values To And Extracting Them From A Vector
Nov 28, 2012I am writing a program to play rock paper scissors, and I am trying to get a vector to store the result of a given round of play, and output it as a declaration as to who won. I can't figure out how to store the values in the vector properly, and how to use the vector as an argument to output the result of play.
Code:
#include <iostream>
#include <iomanip>
#include <ctime>
#include <vector>
#include <cstdlib>
#include <string>
using namespace std;
const string name[4] = {" ", "rock", "paper", "scissors"};
const string roundResult[3] = {"computer win", "player win", "tie"};
[Code]....