General C++ Programming - C++ Forum - August 2011 (Page 21)

runtime: writing/reading datafile VS allocating storage for huge matrices

Dear all, I am going to write a program that has to calculate with huge matrices (sometime sparse, sometimes not) of size than more than 10.000 x 10.000 There...

[no replies]

by Chathu

Call By Value And Call By Reference ...This Code Isn't Working .

Hi. Can Someone Plz Help With This Code. It Gives A Error When I compile It. Cant Figure Out What The Error Is:( I Use Dev c++ BTW #include<iostream> usin...

[2 replies] Last: Thanks :) (by Chathu)

by darkhorse

SDL String Input Problem

After my second term of C++ programming I thought I had finally escaped the clutches of SDL, turns out it reared its ugly head again. I have used SDL before but...

[4 replies] Last: Also, i just went ahead and took out the code that disables unicode, s... (by darkhorse)

by Mr Random

2D Pathfinding, need help

Hi guys I've been making a simple game of pacman using c++ and SFML. Currently I have the map, Pac-pills, Pac-man, Movement and Powerpills in the game all worki...

[6 replies] Last: The link eraggo posted has an example in it. Again, you could do it w... (by hamsterman)

by j05hcap

Pulling from a dif file

In short I want to have a list of names in a .txt (or whatever) file and pull from a line number. In my prog I got random to pick 3 dif numbers. From those n...

[2 replies] Last: Meh. I've seen worse. Much worse. (by helios)

by SUPERFLY

Pure Virtual Error, Please Help!

I am trying to get both PersonType class and EmployeeType class to be abstract and the pure virtual method is to be overiddin in the derived classes. Here is...

[2 replies] Last: Remove bolded part: //virtual char PersonType:: GetType(void) = 0;... (by savavampir)

by rain

wstring to char* problem

Does anyone know why I get only 1st char of title and not full title? I need to convert that title to char * becauseI want to use it with lua_pushlstring to ...

[4 replies] Last: Do you know the difference between the ANSI char set and the UNICODE c... (by andywestken)

by itcplpl

benchmarking code

hi, I am trying to write a benchmark program that takes about 20 minutes to complete because the actual functions needs to be called plenty(unknown variable) t...

[2 replies] Last: does that mean something like this (mtime>1000)?cout<<"elapsed tim... (by itcplpl)

by Adarsh

Data structures in c++ stl

Are there any built-in data structures for avl trees in c++ standard template library? What sort of data structures are supported in stl?

[2 replies] Last: no i dont think . we have Binary tree BST and heap that create on arra... (by ahura24)

by mido22

how to sort arr in struct

i have struct mido { int wage,boss; }; arr .wage=5 , arr .boss=0 arr .wage=2 , arr .boss=2 arr .wage=4 , arr .boss=1 arr .wage=3 , arr .boss=0 arr...

[4 replies] Last: if you want use STL and write a general code you need define first you... (by ahura24)

by cellkyborg

General question about includes

Hi everyone! I've been searching for the solution to the following question for a while with no success. Hopefully you will be able to help or clear me out. ...

[3 replies] Last: The only way to accomplish this would be if mylibrary.h does not inclu... (by Disch)

by sin0emp

Question about deleting

fist, if i specify memory with new operator to a pointer and i don't free the space with delete operator, what will be the result? will i get an error later? o...

[1 reply] : if i specify memory with new operator to a pointer and i don't free t... (by Disch)

by Robertlzw

External Linkage Leakage in C++

Can someone here please explain what is the external linkage leakage in C++? Thanks.

[1 reply] : Basically what it means when someone uses the extern keyword is that... (by Albatross)

by sae

problem with consecutive numbers

Hi I have been trying to generate consecutive numbers from 0 to 16 without a for() (I can't use the for because the hardware I'm working with doesn't allow me t...

[4 replies] Last: does your hardware support goto label: code here; got... (by closed account zwA4jE8b)

by szyfuch

A faster algorithm

#include<iostream> using namespace std; int main(){ int n, *tab; long long int cur = 0, max = 0; cin>>n; tab = new int ; for(long int i=0;...

[7 replies] Last: What is the algorithm common with that I have written in my first pos... (by Syuf)

by zhenglian li

how to know the size of a struct

I have some problems,please help me ,thank you..... I want to know the size of some structs by their name. But , I read the name from a txt and the type of the ...

[6 replies] Last: thank you very much!.... I got it! (by zhenglian li)

by aymanbah

Copy C`tor and operator=() implementation

Hi, i need some help with Copy C`tor and operator=() implementation, i don`t know how to implement operator=() with copy ctor when i have array of Customers*. ...

[6 replies] Last: thank you man, it was very helpful :) (by aymanbah)

by goldriver

Unsigned Characters ,strings

Please help me with this program ,i have a final exam tomorrow and i literally don't know whats going to happen. #include<stdio.h> #include<conio.h> stru...

[1 reply] : This code plays a lot with bit order. It would help to write down each... (by hamsterman)

by ms4800

passing a file object as a const reference

hello void compress::makeDict( ifstream &fin) { string word; while(fin){ fin>>word; cout<<word<<endl; ...

[4 replies] Last: While reading you change the get pointer position. (by Syuf)

by rudy01

boost filesystem question

Hello all, I am trying to use the "path" and "copy_file" functions of boost filesystem in C++, and they work fine, except for cases when there are hidden file...

[1 reply] : You might want to ask this question in the Boost mailing list/forum (I... (by helios)

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General C++ Programming - August 2011 (Page 21)