Is it valid for an object to return an object of they same type? GetBlock method
class memBlock {
private:
char *mem;
unsigned long length;
public:
memBlock(char *data,unsigned long startPoint, unsigned long endPoint) {
[Code] .....
class Base
{
char * ptr;
public:
Base(){}
Base(char * str)
[code].....
Obj1 is a derived class object where base class char pointer is initialized with "singh" and derived class char pointer is initilized with "sunil". I want to create Obj2 out of Obj1. Separate memory should be created for Obj2 char pointer (base part and derived part as well) and that should be initialized with the strings contained in Obj1.
Here the problem is: Derived class part can be initialized with copy constructor. How to initialize the base class char poniter of Obj2 with the base class part of Obj1. char pointers in
both the classes are private.
I tried using initializer list but could not succeed.
Is there some proper way to do this?
How can I return other object's value in a function(see code and comments)?
Person.h
Code:
#include <iostream>
#include <string>
using namespace std;
class Person{
public:
Person();
Person(string pname, int page);
[Code] ....
I am new to c++ and trying to learn. for instance. i have a struct and method.I am trying to learn what i can do with the method if i define the return type as struct type.
struct S {
int age;
string name;
};
S method() {
//what i can do in here. with the Struct. I mean can i reach members of the struct. etc
}
Requirement: the AddRegistration method in the RegistrationDB class should accept a Registration object and return a Boolean value that indicates if the operation was successful
a brief overview. Form with two combo boxes and a button, when you click the button the data from the combo boxes is entered into a table in the connected database...
Try to implement overloading << operator. If I done it void then everything work fine (see comment out) if I make it class of ostream& then the operator return to me some memory address.
Code:
#ifndef Point_HPP // anti multiply including gates
#define Point_HPP
#include <sstream>
class Point {
private:// declaration of private data members
double x;// X coordinate
double y;// Y coordinate
[Code] .....
Say I have a structure defined as such:
struct data{
char c;
int x;
};
And I want to create a function to print either c or x. However, I don't want to just use a switch or something to figure this out, I want to reference which part I'm outputting.
Now here's the twist
vector<data> dataList;
I need to access element x or c in the vector, but all I pass is the vector and which element, so that I might have something like:
void (vector<data> x, DataType i){
cout << x[0].i;
}
So now, if I pass either x or c (someway), I can output one of them.
for example i have
int count = t1;
while(count>counter){
Sleep(delay);
Int32::TryParse(textBox2->Text,add);
result = result + add;
counter = counter + 1;
Problem is that sleep stops all program for specified time, Is there an alternative to sleep that would only stop part of code or can i use sleep different way to specify what it pauses?
Is there any way I can clear only a selected part of the screen? (I'm aware of system("cls"))
For example, when you enter a date, and is wrong, could it just errase that input and only say "Wrong try again" without errasing everything else you where doing?
In this case, a function that only errases what is in the while
while(not wrong)
{
cout<<"DIA: ";
cin>>obj.dia;
cout<<"MES: ";
cin>>obj.mes;
cout<<"ANIO: ";
cin>>obj.anio;
}
PS: Also, is there any whay in which you can ask the user to enter the date DD/MM/YYY?
I am having a little bit of trouble with what should be a simple part in my code. For some reason it keeps looping the name part of the program and I seem to be passing over the problem in the code.
Here is the code:
#include <iostream>
#include <string>
using namespace std;
[Code]....
I have the following string: "type computer {dell}"
And I want to remove the {dell}
So that the output on the screen type computer
Or delete any clause between the two brackets {}
How do i do that ?
Code:
// string::erase
#include <iostream>
#include <string>
int main () {
std::string str ("This is an example sentence.");
std::cout << str << '
';
str.erase (10,8);
std::cout << str << '
';
Code:
Output:
I don't understand this program. What do these 2 numbers represent? The index of an element in a character array? The 10th character of the array is 'n' and 8th is a "space".
I'm writing some functions pertaining to binary trees. I've used recursion once before while learning quicksort but am still quite new and unfamiliar with it. And this is my first time touching a binary tree. So my question: In my addnode function, will the return root statement at the end ever return a value other than the value passed to the function?
Code:
#include <stdlib.h>
struct tnode
{
int data;
struct tnode * left;
struct tnode * right;
}
[code]....
I'm having a problem converting part of a string to an integer.I used strtok to seperate my string and I have also a function for atoi but how to apply it to my strtok function.What i need is to change the char *years to an int.Have a look of what I got:
Code:
int main() {
char sentence[]="trade_#_2009_#_invest_#_DEALING";
char *word=strtok(sentence, "_#_");
char *year=strtok(NULL, "_#_");; // assigning NULL for previousely where it left off
char *definition=strtok(NULL,"_#_");
char *synonyms=strtok(NULL,"_#_");
[code]...
I have a character array that includes configuration bits that are 0x00, thus when I try and do a strcat it adds the appended string into one of those spots instead of the end of the array.
View 2 Replies View RelatedI'm writting an algorithm which equals to std::to_string. The inttostring part is fine, and the decimal_part too. But when the number digits > 5, the program loops infinitely.
#include <iostream>
#include <string>
#include <algorithm>
[Code]...
In this code, the program runs ok. But try to add a 5 at decimal_part. What should I do to get this 'decimal_part' ok?
I have a vector of sets, which I am removing any element which contains a certain value. For example, if I was looking for 2:
[0] 1 2 3
[1] 4 5 6
After the program was run, I would be left with just [0]4 5 6.
This is the code I have been using
auto iter = std::remove_if( clauseVector.begin(), clauseVector.end(),[propagator] ( const std::set<int>& i ){
return i.find(propagator) != i.end() ; } ) ;
clauseVector.erase( iter, clauseVector.end() ) ;
I want to know, is there any way I can tweak this code so that it only removes one part of the set rather than the whole thing. For example with above example, I would be left with
[0] 1 3
[1] 4 5 6
math part.
The equation I need to use is: payment = [(rate * (1 + rate)^number payments ) / ((1 + rate)^number of payments -1)] * loan
Also, the value of rate in the above equation is (interest/12)/100. So 12% annual interest would be 1% monthly interest.
heres my code:
#include<iostream>
#include<cstdio>
#include<cmath>
using namespace std;
[Code].....
I can't run my program. I have undefined reference on the declaration part , where is the error here :
#include <iostream>
using namespace std;
#define T_TABLEAU 5 //change la taille tableau ici
void TableauEntre(int* tab,int n);
void QuickSort(int* tab,int IndexPrem,int IndexFin);
int Partition(int* tab,int pivot,int IndexPrem,int IndexFin);
[Code] ....
Is there a function that can take out part of the string such as,
C:/Users
I want to take out Users.
I need the function to search for the first "/" and take out the last dir name
C:/windows would be c:
C:/users/bla would be c/users
Im programming in visual studio 6.0 MFC
Code:
#include <cstdlib>
#include <iostream>
#include <string>
#include <stdio.h>
#include <windows.h>
#include <conio.h>
#include <exception>
#include <process.h>
using namespace std;
int main(int argc, char *argv[])
[code]....
The exercise is : Define a class Arc, which draws a part of an ellipse.
Hint: fl_arc()
And the body of the class ellipse is as follows in the book (PPP):
struct Ellipse :Shape {
Ellipse(Point p, int w, int h); //center, max and min distance from center
void draw_lines()const;
Point center()const;
Point focus1()const;
Point focus2()const;
[Code] ....
And the fl_arc() probably is part of FLTK which I've installed it on my machine.
Now the problem here is that while I don't can see the full version of the body of the ellipse how to do this exercise?
How can I Passe some part of multi-Dimensional Array to a Function; for example only two dimension of three dimension of a an array with 3 dimension. This is because my function is defined for working with 2 dimension arrays.
View 3 Replies View RelatedFrom the page: [URL] ....
#include <iostream>
using namespace std;
int n;
int& test();
[Code] ....
Explanation
In program above, the return type of function test() is int&. Hence this function returns by reference. The return statement is return n; but unlike return by value. This statement doesn't return value of n, instead it returns variable n itself.
Then the variable n is assigned to the left side of code test() = 5; and value of n is displayed.
I don't quite understand the bold sentence. Shouldn't value of n and variable n be the same?
I want to compare the part of the character array with the scanned input. I've initialized the character array (colourCompare).
What I want to do is, if the input colour matches up with one of the elements in the colourCompare array, it will then read the next value(I did not include "read the next value part"). If the input does not match up, then it goes back to the scanning part.
Code:
char colourCompare [12][6] = {"Black","Brown","Red","Orange","Yellow","Green","Blue","Violet","Gray","White","Gold","Silver"};
float resistanceCal() {
[Code]....
How to find the biggest column of the matrix (higher of main diagonal) Here is the draft of code that i desighned/ Of cause it has a several mistake. My task is here to create the matrix, allocate the dynamic memory for it, and to find the biggest sum of the column elements that is located over main diagonal. So main points is correct memory allocation, and the sorting to the biggest sum of column higher than diagonal.
#include<iostream>
#include<conio.h>
#include<time.h>
using namespace std;
[Code]....