Is there member functions for STL's like vector,list etc., to shuffle the content of that STL.
eg:
int arr[] = {1,2,3,4};
std::vector<int> v1(arr, arr+ sizeof(arr) / sizeof(int) );
now i need to shuffle the data randomly like
Now vector may contain {3,2,4,1} or {2,1,4,3} ...
I have taken vector as an example. let me know if there is any alternative way with other STL's
I have a 2D array with 108 strings. How do I shuffle it correctly?
Code:
void Shuffle( char dest[208][13] )
{
// Initialize variables
char temp[13];
// Loop and shuffle(swap array values)
[Code] .....
The program force closes.
In my MFC, CMyPorpertyPageDlg is derived from CPropertyPage. How to access its member function from a nonmember function in the same CPP file?.
void Non_Member_Get_PorpertyPage()
{
CMyPorpertyPageDlg* pPageDlg = ....
}
I get the following error in XCode whenever I try to access the member I created 'randomGen' in a separate class in a different header file. I have made sure to include the header file and have tried to access it through an object.
This is the code I enter when trying to access the method from randomiser.h in main.cpp. It is also an overloaded function with doubles and integers:
RandomG randomiser;
randomiser.randomGen(); // 'Call to member function 'randomGen' is ambiguous'
This is the code inside randomiser.h:
#include <string>
#include <iostream>
using std::string;
using std::cout;
using std::endl;
class RandomG {
[Code] ....
This is the error inside xcode: [URL] ....
I have tried seperating the code for the functions in another class (main.cpp) and then running and it seems to works, so I'm not sure why I can't put everything in the .h file and then access it?
I would like it in a seperate file so it doesn't clutter my main. I am writing a game with SDL so that might be confusing and I would like the window to have a random title and other random properties, so it would be easier to use a function.
If I wanted to call a member function inside another member function, how would I do that, if it's possible?
For example, if I have Find(int key) defined already and wanted to call it while i was overloading operator+.
I need to write a function that will merge the content of two sorted arrays of type double values. The function should not assume that both its input parameter arrays are the same length.
Here is my program so far - I know there is alot of errors and mistakes:
Code:
#include<stdio.h>
void merge(int firstArray[],int secondArray[],int size) {
int mergedArray[size],i=0,j=0,k=0;
while(i<size||j<size) {
if(i==size) {
[Code]...
#include <iostream>
class Hello {
public:
void Test() {
[Code].....
As i know a non-constant member function cant be called inside a constant member function but how the above code has been compiled successfully and giving the expected result .
I am trying to write a sub-program that takes a deck of 52 cards and will shuffle it up using this algorithm:
Start with n=51
Repeatedly:
Generate a random integer between 0 and n. Call it i.
Swap card i and card n in the deck.
Decrease n by 1
However the code that I've written,
vector<int> shuffleDeck(vector<int> deckVector)//deckVector is the original deck in order
{
int temp, n, i, s;
n = 51;
[Code].....
when I output the new vector, only produces this output(note- it is a random number every time, but it just repeats over and over):
8 8 8 8 8 8 8 8 0 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8
8 8 8 8 8 8 8 8 8 8 8 8
or:
22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 0 22 22 22 22
22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22
HOW TO SHUFFLE A WORD COMING FROM A FILE?
FILE *DOCU;
DOCU = fopen ("file.txt", "r");
if (DOCU == 0) {
printf ("
Failed to open!
[Code] .....
What's wrong with my shuffle function? It shuffles some songs, yet completely gets rid of others.
Here's the code:
void shuffle() //Shuffles songs into a random order. {
Music temp, temp2; //Temporary music file holders, 'Music' is a struct with string title;, string artist;, and int size;.
unsigned int currentTime = (unsigned)time(0);
srand(currentTime);
for (int i = 0; i < NUM_SONGS; i++)
[Code] .....
I want it to output this:
1. Title: Runaway2, Artist: Bon Jovi2, 2 MB
2. Title: Runaway5, Artist: Bon Jovi5, 5 MB
3. Title: Runaway1, Artist: Bon Jovi1, 2 MB
4. Title: Runaway4, Artist: Bon Jovi4, 1 MB
5. Title: Runaway7, Artist: Bon Jovi7, 5 MB
6. Title: Runaway6, Artist: Bon Jovi6, 5 MB
7. Title: Runaway3, Artist: Bon Jovi3, 5 MB
8. Title: Runaway8, Artist: Bon Jovi8, 1 MB
Or something along those lines, but instead I get something like this:
1. Title: Runaway7, Artist: Bon Jovi7, 1 MB
2. Title: Runaway2, Artist: Bon Jovi2, 2 MB
3. Title: Empty, Artist: Empty, 1856312448 MB
4. Title: Runaway4, Artist: Bon Jovi4, 1 MB
5. Title: Runaway5, Artist: Bon Jovi5, 5 MB
6. Title: Empty, Artist: Empty, 0 MB
7. Title: Runaway7, Artist: Bon Jovi7, 1 MB
8. Title: Empty, Artist: Empty, 1856312448 MB
I learned the bitwise operations in c, but how to shuffle the bits of the plain text accoring to DES's standard. Even with the key and the S-boxes. How DES is performed in C step by step. I have a fair knowledge in C.
View 3 Replies View RelatedI can't get this code to compile (using VS2010 and gcc4.6.1):
Code:
#include <string>
#include <vector>
#include <algorithm>
#include <boost/bind.hpp>
class X {
public:
void foo( const std::vector<std::string>& v ){
[Code] ....
VS2010 presents an error message like "member function already defined or declared" and gcc something like "... function can not be overloaded" (very cryptic error message).
If I change the vector to foo to std::vector<int> and let bar() take an int, it works perfectly fine. And if I use boost
Code:
std::for_each( v.begin(), v.end(), boost::bind( std::mem_fun(&X::bar), this, _1 ) );
The above code compiles as well.
While it is perfectly fine for me to use boost I would nevertheless like to understand what's happening here.
I mount a function (parameter - numeric vector; returns a string). However, this same function is used in several classes. To avoid that I keep duplicating the same code within these classes there is a way to do that as the code below?
std::string func( const vector<int> vec ) {
//processamento
return result;
} class A {
[Code] ....
whether i can define a member function inside a class or not in C++. Is the following code is legal?
#include<iostream> using namespace std;
class adder {
private:
int a;
int b;
int c;
int answer;
public:
[code]....
#include<iostream>
using namespace std;
class Student{
public:
int age;
int rollNo,marks;
string name;
void AddEntry();
[Code] .....
error: non-member function 'void Display(Student*, int)' cannot have cv-qualifier|
why and how can I solve it?
I have an assignment in my OOP c++ class and I had to create a class called date and one of the member functions is a compare function that compares two dates that are taken in. It is suppose to be something like this:
Date d1(12,25,2003);// Dec 25, 2003
Date d2(5,18,2002);// May 18, 2002
d1.Compare(d2);// returns 1 (since d2 comes first)
d2.Compare(d1);// returns -1 (calling object is d2, comes first)
Then if d1 and d2 are equal then it returns 0.
This is what he gave us to start with the function:
int Date::Compare(const Date& d) {
}
I want to take address of a member function in c++. How to do this.
View 2 Replies View RelatedI am trying to use "remove_if" with a predicate function inside a class. The code intends to remove the grid cells which an agent cannot move into (from among all possible cells).
Code:
void classname::function1()
{
vector<MoorePoint> neighbors;
....
[Code]....
That code would work if it was not in a class and the predicate was not a member function. However, now I receive long error messages which I guess refer to incompatibility of remove_if template with the predicate parameter (one error includes : error C2064: term does not evaluate to a function taking 1 arguments).
I got this program to create an array of playing cards and assign the values and suits and shuffle the array. I'm at the point where I need to output the cards but I need to burn the first card by making it output "**" instead of the card. my cards[] is a constant so I can's assign the first card as such.
void showCards(const int cards[], int numCards, bool hideFirstCard) {
if (cards[0]) {
hideFirstCard=true;
cards[0] = '**';
} for(int a = 0; a <= numCards; a++) {
cout >> showCard(cards[a]);
} }
I am working with a limited compiler (information you may need to know, I don't really know) and I made this function
Code:
void Swap(int &a , int &b); {
Destination temp;
temp = list[a];
list[a] = list[b];
list[b] = temp;
}
In the private part of a class and it is giving me the error "Member function prototypes not supported". How do I fix this and what is a member function prototype exactly?
why can't << operator be overloaded as a member function is it because that is the way c++ is written and you just can't or is there another reason because I'm confused.
View 2 Replies View RelatedI want to have a template function that is a member of a class. Is this possible? This code snippet is how I would think the syntax would go, although it doesn't compile. How would I achieve the same effect?
Code:
class myclass {
public:
int member ;
} ;
template <typename T> void myclass::func( T& arg )
[Code] .....
I'm writing a small c++ program which will be able to do a few things with a matrix. I have a class called Matrix and a member function in it called getSor() which returns an integer value about the number of lines in the matrix. When I call this getSor() function the program says: error: request for member ‘getSor’ in ‘matrix’, which is of non-class type ‘Matrix*’
- 'matrix' is an existing Matrix object here
- I called the function like this: "cout << matrix.getSor() << endl;"
I need to keep a static variable in a member function of a class that I have many objects of. I've had some trouble with it, and when I read up I found that such variables are static across all instances. Is there any way around this?
View 3 Replies View Relatedi am trying to describe the unusual situation where you declare a class member function with this format:
bool class::function_name(void) const
Specifically where the 'const' follows the parameter list. It is my understanding this is a very useful way of ensuring that whatever code you put in the function definition cannot change any data members of its class.
However I have recently read that this form of declaration should not be used as it leads to less optimized and slower code. Is this correct?
In the below code I'm having trouble calculating the algebraic equation on the line marked with &&&. I attempt to calculate it both within the member function Energy(x) and within find_kin_en(x), but in the latter I find the result equal to zero, which is wrong and disagrees with the correct value calculated in Energy(x). I think the problem might be having multiple nested member functions, i.e. operator() calls Energy(x) which calls find_kin_en().
#include "/u7/tolsma/Numerical_Recipes/nr_c304/code/nr3.h" // these are numerical recipes libraries, not important for the problem below I believe.
#include "/u7/tolsma/Numerical_Recipes/nr_c304/code/mins.h"
#include "/u7/tolsma/Numerical_Recipes/nr_c304/code/mins_ndim.h"
[Code]....