Search DaniWeb - dereferencing

Re: dereferencing operators 14 Years Ago by ArkM … Dragon;855416]There is no such concept as "dereferencing and operator". Operators are like <, >, …<=, /, +, etc. You probably mean dereferencing a pointer. [code] int n = 123; int* p = …Standard Draft where [icode]operator*()[/icode] named [i]dereferencing operator[/i]. However as usually this operator called … Re: dereferencing operators 14 Years Ago by Ancient Dragon There is no such concept as "dereferencing and operator". Operators are like <, >, <=, /, +, etc. You probably mean dereferencing a pointer. [code] int n = 123; int* p = &n; *p = 0; // dereferencing a pointer [/code] dereferencing operators 14 Years Ago by nature_love hey guys.. am learning c++ just started.. am not able to implement member dereferencing operators.. i know there basic definations and rules but...its like.. a clear picture is still not coming to my mind..as in how to make use of them.. please explain with examples.. Re: dereferencing operators 14 Years Ago by siddhant3s …, meant that he wants to customize the uranary * operator ( the dereferencing operator) for is custom class. I don't know why… Re: dereferencing operators 14 Years Ago by mvmalderen …, meant that he wants to customize the uranary * operator ( the dereferencing operator) for is custom class. [/QUOTE] He mentions that he… Re: dereferencing operators 14 Years Ago by siddhant3s "implementing the dereferencing operator" means overloading it for your class. I though agree, that the OP may not referring to operator overloading. Anyways, in that case, the Dragon has already replied. Re: dereferencing operators 14 Years Ago by nature_love … u please give me some sample programs using above member dereferencing operators..i'll be highly obliged.. come on guys.. help… Dereferencing confusion... 14 Years Ago by grib … I missing here? [i]Sorry, my original problem was with dereferencing, so the thread title, which I forgot to change, is… Re: Dereferencing confusion... 14 Years Ago by grib …. I began by buzzing off a decent post about a dereferencing problem I had, but I then figured it out while… Problem Passing Ifstream Pointer to Main Function and Dereferencing 11 Years Ago by dyl_ham … ifstream pointer to the main function, I'm having trouble dereferencing it. #include <iostream> #include <fstream> #include… Re: dereferencing operators 14 Years Ago by ArkM [url]http://www.informit.com/guides/content.aspx?g=cplusplus&seqNum=142[/url] Re: Dereferencing confusion... 14 Years Ago by Lerner I still don't understand the question. Please be more specific. I do see that you don't null terminate can->name in putCandy() so technically can->name is a simple char array not a string. Try fixing that and see what happens. If it doesn't fix things then post with a specific question. Re: Dereferencing confusion... 14 Years Ago by programmersbook [CODE] strcpy(can->name, ch );[/CODE] better use std::string. Re: pointer dereferencing 10 Years Ago by Ancient Dragon Post your code, the diagram you posted is not very helpful to find the problem in your program. My guess is that the pointer you used was not initialized to a specific address before dereferencing it. For example int k = 123; // original integer int* p = &k; // initialize a pointer int q = *p; // dereference the pointer Dereferencing vector.begin() not dereferencable... 12 Years Ago by Jsplinter [CODE] vector<int> iv; iv.push_back(4); vector<int>::iterator it = iv.begin(); cout << *it; cout << *(iv.begin()); //debug assertion here [/CODE] Why can't I dereference iv.begin() directly? Re: Dereferencing vector.begin() not dereferencable... 12 Years Ago by sfuo I compiled this with Code::Blocks and Visual Studio and both worked just fine. Re: Dereferencing vector.begin() not dereferencable... 12 Years Ago by mzimmers Compiles (and runs) using gcc, too. Here's my entire program, built from your snippet: [CODE]#include "vector" #include "iostream" using namespace std; int main () { vector<int> iv; iv.push_back(4); vector<int>::iterator it = iv.begin(); cout << *it; cout << *(iv.begin()); //debug assertion here… Re: Dereferencing vector.begin() not dereferencable... 12 Years Ago by Jsplinter Hmm, I have no idea why it is causing a problem on my system. It compiles but throws an exception in debug mode. I thought it should certainly work. But The code was cut and pasted and it wasn't working in debug mode of VS2010. I thought I was losing my mind. Glad to know that something else was going on. Re: Problem Passing Ifstream Pointer to Main Function and Dereferencing 11 Years Ago by deceptikon In proper socratic fashion I'll ask you this: what happens to an ifstream object when it goes out of scope? Re: Problem Passing Ifstream Pointer to Main Function and Dereferencing 11 Years Ago by dyl_ham Thanks for the reply. I've declared the ifstream on the heap so it doesn't go out of scope when the function exits. However, I'm still not quite sure how to work with the ifstream when it's returned to the main function. For example, reading the file stream. The program compiles if I exclude the do loop in the main function. ifstream * … Re: Problem Passing Ifstream Pointer to Main Function and Dereferencing 11 Years Ago by deceptikon ifstream doesn't have a copy constructor. Rather, it's declared private prior to C++11 and declared deleted in C++11. Either way, you can't copy stream objects in any generally useful manner, so it's truly awkward to use them as a return value. I was pushing you toward a different solution entirely, specifically using an output parameter: #… Re: Problem Passing Ifstream Pointer to Main Function and Dereferencing 11 Years Ago by dyl_ham Thanks a lot for the reply, deceptikon. I would have found a different way of doing it if it weren't in my professor's explicit instructions. As per his instructions: > ifstream * openInputFile() - Prompt the user for a valid input file name, and return an open file stream connected to the input file. Called as needed to open an input file, … Re: Problem Passing Ifstream Pointer to Main Function and Dereferencing 11 Years Ago by histrungalot ##@dyl_ham, your last try was really close. Just move some things around. #include <iostream> #include <fstream> #include <cstdio> #include <cerrno> using namespace std; ifstream * openInputFile() { string fileName; cout << "Please enter a valid file name: ";… Re: Problem Passing Ifstream Pointer to Main Function and Dereferencing 11 Years Ago by dyl_ham histrungalot, I see what you're doing there. Thanks a lot! I'll give it a try now and see what I can come up with. How to be Crash Free 19 Years Ago by meabed …font=VERDANA, ARIAL, HELVETICA, SANS-SERIF][size=1]Dereferencing an uninitialized pointer[/size][/font] [list=1] [*][font…font=VERDANA, ARIAL, HELVETICA, SANS-SERIF][size=1]Dereferencing a deleted pointer[/size][/font] [list=1] [*][font…=VERDANA, ARIAL, HELVETICA, SANS-SERIF][size=1]Dereferencing an uninitialized pointer is prevented by rule 1. … Cygwin socket problem 14 Years Ago by TheBeast32 … incomplete type stuff.c:40: error: dereferencing pointer to incomplete type stuff.c:41: error: dereferencing pointer to incomplete type stuff.c… incomplete type stuff.c:46: error: dereferencing pointer to incomplete type stuff.c:51: error: dereferencing pointer to incomplete type I added… Re: Cygwin socket problem 14 Years Ago by developer_borja …;sin6_addr);[/CODE] If you're getting this error: [CODE]error: dereferencing pointer to incomplete type[/CODE] Chances are you left out… header file, librerie, make ed error.... 15 Years Ago by edel … named ‘ifr_name’ main.c:374: error: dereferencing pointer to incomplete type main.c:376: error: dereferencing pointer to incomplete type main.c… Segmentation Fault Problems 14 Years Ago by Alibeg … for Segmentation Fault if it isn't: 1. dereferencing NULL pointer 2. dereferencing uninitialized pointer 3. accessing memory out of bounds or… Regarding Endianess 13 Years Ago by myk45 … for that. i have a small doubt regarding endianess and dereferencing of elements This is what i tried: [CODE]#include <… machine(Intel). Now, my question is, how exactly is the dereferencing of the pointer take place? i mean the bytes are…