General C++ Programming - C++ Forum - February 2011 (Page 22)

Setting the active database using mysql C API

how do I set the active database after logging in mysql_real_connect( conn, "localhost", "username", "password", NULL, 0, NULL, 0 ); mysql_query( conn, "cr...

[1 reply] : http://dev.mysql.com/doc/refman/5.0/en/mysql-select-db.html (by guestgulkan)

by abakiz

Basic Object naming problem

I'm trying to create a list of objects that change name every time they are created. I.e, Square1, Square2, Square3 For some reason it's giving me the err...

[15 replies] Last: Anyhow, thanks a lot for that, I was trying to figure this out all day... (by abakiz)

by exiledAussie

program parameter style

A simple question, perhaps of taste: If you want to define a program parameter that can not be altered at runtime, but might be altered as you test the progr...

[1 reply] : Use a global constant probably. It's better than a define in this c... (by firedraco)

by mirauta

pointer to map

Hello I want to create an array of map structures. i am using the bellow code but it seems that I doesn't work ///// typedef map <double, double> mapda...

[4 replies] Last: mapdata** point = new mapdata* ; point = new mapdata; points ->ins... (by hamsterman)

by okimdone2

Linker Errors

Well, I've got linker errors (I think...) and i need some help to solve them. I've written these going by what i have learned from the internet sense my program...

[3 replies] Last: Ok so i figured it out. In my func.cpp file i have to have: std::o... (by okimdone2)

by Fumomo

Adding values of duplicated arrays and replacing

Hi all, I was hoping for some help and hints to the problem i'm facing now. Right now i have a a 2D array which stores the elements: 22Jan11 180 11Feb11 ...

[1 reply] : A multimap would be a more appropriate data structure. (by kbw)

by secondrate

sinh(3391014490.0)

Hi guys, I want to evaluate sinh(3391014490.0) as i'm doing numerical simulation. It produces inf and RR: overflow in NTL (i used (0.5)(e^x + e^-x)). Anyone ...

[6 replies] Last: Wolfram Alpha is neat. (I found a way to break it, though. :P) Do t... (by Kyon)

by Keithin8a

Deployment problem

Hi, I made a DirectX demo for my portfolio and now I'm trying to add it to my website so prospective employees can download it and see what I can do. My prob...

[no replies]

by asuri

Storing 1 as 01 in array

Hey guys, so as the title suggests I am looking for a way to store 1 as 01 or any number of 0 as prefix. Is this possible for an int array? Thanks.

[4 replies] Last: I fixed the problem, used a string array and used the insert() functio... (by asuri)

by elii255

insert a data to list in c++

I have a function: void list_insert (struct lista *head,int n,int k) { struct lista *wsk=head; if(wsk==NULL) {wsk=new li...

[6 replies] Last: is that program correct?? struct lista { int id; lista * next; }... (by elii255)

by preethiraj

Output not displaying the cards when dealt.

Hi, My program logic is working great for five card poker game and hand contains a pair and iterated the loop to find how many times program ran until pair w...

[no replies]

by eye51

Problem: vector, algorithm

Hi, I have a requirement of arranging a vector in given format, Let say, I have an vector like this: vector<int> VEC; VEC.resize(16); Values are: ...

[12 replies] Last: Hi simeonz, hamsterman, jsmith, onur, Thanks for your all replies. ... (by eye51)

by Neb1000

Getting and error but I don't know why.

Here is my slist.h: #ifndef SLIST_H #define SLIST_H #include"snode.h" #include"slistiterator.h" #include<stdexcept> using std::out_of_range; templ...

[5 replies] Last: Ok it works. Thanks for all the help. (by Neb1000)

by akounga2000

sorting using "strcmp" command

Hi everyone, i'm new to C++ and i want to sort name alphabetically and i came up with this program but i'm having error. find my program below; can someone go t...

[2 replies] Last: i'm two errors, you are right about "str" identifier, the error is com... (by akounga2000)

by ImpulseChimp

Constantly updating cin statement in C++

I am creating an rpg style text game in C++. The game is running in a constant game loop that updates the screen 10 times per second. I am trying to figure ...

[5 replies] Last: @ bzb65 while ( 1 > 0 ) ? why not while (true) ? Also, hugely agr... (by quirkyusername)

by Katma

School project

I'm trying to do a CSC project that involves basic arithmetic problems to calculate the final velocity of a problem. he problem is, I keep getting error message...

[13 replies] Last: You rock, Wolfgang. Thank you so much. (by Katma)

by imzack

problem allocation of memory?!?! copy part of a sting....

Ok, so I am trying to read from a text file, I can converted each line into a string and print it one line at a time, that works. now i want to take part of ...

[2 replies] Last: FIXES (that I can find): #include <iostream> #include <limits> // ... (by wolfgang)

by Toothkiller

Using c++ in internet application

I have an application where you give me math I return answer. I would like to know what is the best way to put this in an internet application if it is all writ...

[3 replies] Last: CGI = Common Gateway Interface Simply put, it allows you to write c... (by sadavied)

by Onceler

How do I manipulate nibbles?

I want to be able to read and write nibbles. Also how could I make sure that all my nibbles go into a file an even number of times so that there is no crash(or ...

[3 replies] Last: Er, your file must always be a multiple of two nibbles long... so you ... (by Duthomhas)

by iit2009154

Is C really faster than c++?? (1,2)

In my program the main complexity was because of reading from file and writing in the file . My program was taking 18 mins when i was using fstream objects but ...

[32 replies] Last: Oh, right, I forgot which end is "highest". Maybe "loosest" would be b... (by rocketboy9000)

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General C++ Programming - February 2011 (Page 22)