473,226 Members | 1,518 Online
Bytes | Software Development & Data Engineering Community
Post Job

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 473,226 software developers and data experts.

copy derived structure, is it legal c++ code?


I am trying to copy some variables from a struct to a derived struct.
If I have something like,

struct STRUCTA
int numA;
long numB;
float numC;

struct STRUCTB public STRUCTA
int numD;

STRUCTA structA = {0,1,2};
STRUCTB structB;
memcpy( &structB, &structA, sizeof( STRUCTA) );

Is the above code legal to copy the structure from structA to structB


Feb 22 '08 #1
0 1114

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

by: Simon Elliott | last post by:
--- foo.h --- class foo { public: virtual void DoStuff(void); virtual ~foo(); }; --- bar.h --- #include "foo.h"
by: Edward Diener | last post by:
Coming from the C++ world I can not understand the reason why copy constructors are not used in the .NET framework. A copy constructor creates an object from a copy of another object of the same...
by: mescaline | last post by:
//Consider the simple program with inheritance, plain init for A, copy ctr for B #include <iostream> using namespace std; class Base{ public: Base(){cout << "Base, default" << endl;}...
by: lion | last post by:
in .net, if you set annstance-A of a class equal to another instance-B, a pointer will add to B, but if i want to create a copy of B instead of pointer, how to operate? Note:serialization...
by: Sakharam Phapale | last post by:
Hi All, eg. "Array.Copy" method used to copy array elements. Is there any method to copy collection objects data, except iterating through original collection and then filling each element...
by: Nindi73 | last post by:
A few days a ago I posted my code for a deep copy pointer which doesn't require the pointee object to have a virtual copy constructor. I need help with checking that it was exception safe and...
by: Ninereeds | last post by:
I'm messing around with using mixin-layers (look for papers by Yannis Smaragdakis and Don Batory) to define data structures. One issue is that nodes tend to have pointers to other nodes - the...
by: softwaredoug | last post by:
Here is some test code I've been attempting to compile (Visual Studio 2003) test.h: class Base { protected: Base() {} public:
by: JD | last post by:
Hi, My associate has written a copy constructor for a class. Now I need to add an operator = to the class. Is there a way to do it without change her code (copy constructor) at all? Your help...
by: VivesProcSPL | last post by:
Obviously, one of the original purposes of SQL is to make data query processing easy. The language uses many English-like terms and syntax in an effort to make it easy to learn, particularly for...
by: abbasky | last post by:
### Vandf component communication method one: data sharing ​ Vandf components can achieve data exchange through data sharing, state sharing, events, and other methods. Vandf's data exchange method...
by: isladogs | last post by:
The next Access Europe meeting will be on Wednesday 7 Feb 2024 starting at 18:00 UK time (6PM UTC) and finishing at about 19:30 (7.30PM). In this month's session, the creator of the excellent VBE...
by: fareedcanada | last post by:
Hello I am trying to split number on their count. suppose i have 121314151617 (12cnt) then number should be split like 12,13,14,15,16,17 and if 11314151617 (11cnt) then should be split like...
by: stefan129 | last post by:
Hey forum members, I'm exploring options for SSL certificates for multiple domains. Has anyone had experience with multi-domain SSL certificates? Any recommendations on reliable providers or specific...
by: davi5007 | last post by:
Hi, Basically, I am trying to automate a field named TraceabilityNo into a web page from an access form. I've got the serial held in the variable strSearchString. How can I get this into the...
by: MeoLessi9 | last post by:
I have VirtualBox installed on Windows 11 and now I would like to install Kali on a virtual machine. However, on the official website, I see two options: "Installer images" and "Virtual machines"....
by: DolphinDB | last post by:
The formulas of 101 quantitative trading alphas used by WorldQuant were presented in the paper 101 Formulaic Alphas. However, some formulas are complex, leading to challenges in calculation. Take...
by: Aftab Ahmad | last post by:
So, I have written a code for a cmd called "Send WhatsApp Message" to open and send WhatsApp messaage. The code is given below. Dim IE As Object Set IE =...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.