General C++ Programming - C++ Forum

I've been writing some code that uses the rand() function and I have been noticing that the average number is not right in the middle of the set up slightly bel...

[6 replies] Last: If you're looking for random number between 0 and 1 just calculate r... (by Muckle ewe)

by coercedman66

knowing when to do round error correction

I'm working with floating point binary numbers with my C++ library called Heap Variable, which can be found on sourceforge.net My problem is I don't know how...

[1 reply] : You should probably read a bit about how floating point numbers are re... (by kbw)

by The Encapsulator

Difference amongst macro NULL an '\0' character

Hello! Hope all of you are fine. 1. Can anyone explain to me, what is the difference between NULL and '\0' (which is also referred to as NULL character)? - I...

[6 replies] Last: http://stackoverflow.com/questions/2759845/why-is-address-zero-used-fo... (by cire)

by newer69

optimization of this algorithm?

void teest(int *prm1, int prm2) { int m, n, tmp, flg; for(m=prm2-1; m>0; --m) { flg = 0; n=0; while(n<m) { if ( prm1 ...

[10 replies] Last: and, by the way, the first optimisation IS NOT included by your first ... (by viliml)

by aryu

I dont know how to do this.. Anyone please

I am trying to make it read: First Name: Last Name: Score 1: " " More? Y Score 2: " " More? N That is the output but when it asks 'more?' whatever I pr...

[4 replies] Last: tyty (by aryu)

by even821

output and input to/from file?

i wanna be able to save certain variables in my program, like levels in a game for instance. the only way i can think of is to save the variables to a .txt file...

[6 replies] Last: thanks mate :) (by even821)

by mmccarty12

iostream equivalent of printf("% N.Me", arg);

When using printf to output data, you can use something like below to get the data to line up column-wise. printf("% .5e", arg); The above will print a number...

[2 replies] Last: Took me some time but I figured it out. #include <iostream> #include... (by mmccarty12)

by Enforcer83

Passing a string to ofstream

I have code that developes a string. I intend to pass this string to ofstream for the file name. What is the right way of doing so? // Pass stri...

[4 replies] Last: So for backwards compatability with older compilers use: // Cast... (by Enforcer83)

by Crimzon

Need help putting this together.

I need help putting my time converter and measurement converter together, i know what to do, simply create a menu that either calls the time conversion or the m...

[7 replies] Last: yea i tried that but for some reason it won't work (by Crimzon)

by bluecollarmillonare

need help

i am teaching my dad c++ and we made a simple calculator. i was trying to get the program to ask the user if he wanted to restart and i thought i knew how. im...

[10 replies] Last: dear OP: You should also declare your variables inside of main and gi... (by ceruleus)

by rubix

offsetof; what's /really/ POD?

from http://www.cplusplus.com/reference/clibrary/cstddef/offsetof/ : "...non-derived classes with only public non-virtual member functions and with no constr...

[3 replies] Last: Azagaros, I don't think what you suggest is possible: http://codepad.... (by rubix)

by wbeasley

C++ to C#

What is the easiest way to use C++ code in C# if I am wanting to use C# for a GUI? If it is possible could show a little code that has everything I will need to...

[2 replies] Last: I'm aware of that. My program is currently 600+ lines and it seemed a ... (by wbeasley)

by pushpat

deleting base pointer

Hi Folks :), I need your help, I am getting segmentation fault for "delete bptr_1" ( please refer program written below ). If i remove statements "delet...

[4 replies] Last: Line by line analysis of your code: int main() { base *bptr_1 = new... (by clanmjc)

by friko16

serialize table of objects

Hi. I have a question about serialize and desarialize dynamic table of object's. Let's say I have a class CTowar_internal: class CTowar_internal { int a; ...

[1 reply] : Consider using formatted i/o instead of unformatted i/o. And a std::v... (by JLBorges)

by viliml

bug in INCREMENT?

I made this program: #include <cstdlib> #include <iostream> #include <string> #include <algorithm> using namespace std; int main() { int n, i, ...

[16 replies] Last: Ok, thanks, I got it working now. BTW, this is the whole code: #inclu... (by viliml)

by alexbnc

Write wide-characters in a STATIC

I am trying to do this and I get some weird results. I create a STATIC control with CreateWindowEx but the text of the STATIC control is some rare characters. ...

[2 replies] Last: Thanks! (by alexbnc)

by closed account 937X92yv

Unresolved symbols and other problems (Crypto++)

Hi guys, Im, pretty new to programming and I am having a few problems. I am making a windows form program for storing encrypted passwords. I have created ...

[4 replies] Last: What do people normally do when using Crypto++ and Windows forms? As t... (by closed account 937X92yv)

by Zombnom

New to fstream/argc and argv, is not displaying results ? (Grep program)

I'm currently creating a program that will allow a user to look for a word inside of an input file, then print the whole line in which the program found that wo...

[1 reply] : because while( !in.eof() ) { getline(in, line); cout << line << en... (by PitDaAnimA)

by bhreddy

Reinitialization of iterator in case of vector

Hi All, I am using insert operation in vector. After doing first insert operation iterator needs to be reinitialized. but in case of set it is not required. ...

[4 replies] Last: Because vectors shall have one memory block for all its elements as bu... (by vlad from moscow)

by wbeasley

Easy GUI

I have qt and vs2010 and netbeans. I also have a fully functioning code. The sad thing is I have NO idea how to integrate it with a gui. I understand the basics...

[no replies]

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General C++ Programming - March 2012 (Page 24)