Lowyat.NET: Latest topics by AaronZe

How to add our own plugins?

AaronZe — Fri, 19 Jan 2007 18:30:31 +0800

Hi, i have started a blog with blogsentral.com
I want to add my own plugins, and also some google adsense ads in the blog, but i can't seem to find anyway to add plugins. The only way is to upload into wp-contents folder but obviously i do no have access for that because i am not the site owner.
Please help. Thanks

Pointers

AaronZe — Mon, 04 Dec 2006 02:20:28 +0800

Hi, i stumbled across this problem about pointers, we have this code

CODE

#include <iostream>
using namespace std;

int main()
{
char * mystring = "Hello";

cout << mystring << endl;
cout << *mystring << endl;
}

The mystring pointer would points to the address of the memory locations that store the string "Hello". In other words, mystring supposed to print the address of the string, and *mystring would print the value pointed to by the pointer...but the output of the above 2 cout statements are:

Hello
H

the first cout outputs the string Hello and the second cout outputs the first char pointed by the pointer, in this case the char 'H'

My question is how do i get the address, in other words the value stored in the pointer mystring? the first cout statement supposed to output the value stored in mystring, which is the address of the string "Hello" but somehow it output the string "Hello" instead of the address..

ifstream

AaronZe — Sun, 19 Nov 2006 16:48:18 +0800

Hi, i have another problem with files
usually i used only one file for input

» Click to show Spoiler - click again to hide... «

but now i want to let the user specify which file he/she wants to open...

CODE

#include <iostream>
#include <stream>
#include <string>
using namespace std;

int main()
{
ifstream in_stream;
string thefile;
cout << "Please enter the name of the file\n";
cin >> thefile;

in_stream.open(thefile);//somehow this is an error here
...
...
return 0;
}

how do i open files "dynamically" or whatever it is called?

for loop

AaronZe — Sat, 18 Nov 2006 14:06:07 +0800

Hi! I have this question about for loop

CODE

#include <iostream>
using namespace std;

int main()
{

for (int i=0;i<=10;i++)//i starts at 0 loop until 10
{
cout << i << " first loop" << endl;
}

for (int i;i<=20;i++)
{
cout << i << " second loop" << endl;
}

system ("PAUSE");
return 0;
}

Let's see the code, in the first for loop, the counter variable i is initialized to 0, then it loop all the way to 10, then it stops. Then the second for loop is executed, and it also uses the same name for its counter variable, which is the variable name i. The second loop starts from where the first loop stops, which is the value 11 and loop till 20.

» Click to show Spoiler - click again to hide... «

My question is that isn't the variable i should be local to its own for loop and won't affect other i outside the braces?

I read from a book that this is due to the pre-standard compiler that i use, which means my compiler is an old compiler. I use dev-c++ with mingw 3.0+ something...
probably that is an old compiler.

Another question is that in the book, it state that the possible solutions to this problem is to use different names for the counter variable(eg. use i, j , k etc.).
i understand this solution, but not the second one

The second solution goes like this "if you prefer to use the same name for several for structures, define the control variable before the first for structure". What does this means?

functions

AaronZe — Thu, 16 Nov 2006 19:58:15 +0800

Hi, i encountered this problem
let's say we have a function main_menu()

CODE

#include <iostream>
using namespace std;

void main_menu()
{
start:
int variable1;

cout << "please input an integer\n";
cin >> variable1;

if (variable1 == 1)
{
cout<< "Hello World\n";
}
else
{
goto start;
}

}

int main()
{
main_menu();
return0;
}

the problem here is that when main_menu() is executed for the first time, if the user enters an integer 2, then when it execute the statement goto start, it somehow skips the
cout << "please input an integer\n"; and cin >> variable1 part and jump directly to the if...else structure...which means when it restart, the variable already contain the value 2, and it keep executing the "else" body of the if..else structure..so my question is how to make it cin again a new value if the value is not 1?

There is no website configured at this address!

AaronZe — Thu, 22 Jun 2006 04:50:06 +0800

Hi,

The other day I created subdomain on my website www.coderbee.net

The subdomain is http://blog.coderbee.net

It works perfectly fine

Then i deleted the subdomain

Then i re-added the same subdomain again but this time around that subdomain can't be
used anymore and it keeps on showing the page "There is no website configured at this address!"

The same thing happen to another subdomain of my website http://forum.coderbee.net

Whenever i deleted a subdomain and re-add the subdomain it can't be used anymore

Anyone knows how to fix this?? Please help!!! Thanks!!!

Blogger themes

AaronZe — Tue, 14 Feb 2006 23:24:38 +0800

Hi, can i know where to get free blogger themes? Those provided by blogger is kinda boring....ty