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by: agascoig |
last post by:
I am just starting to learn Java J2RE 5.0. I coded the matrix library
below and found that the array accessing is really slow since each
access is checked:
http://f1.pg.briefcase.yahoo.com/bc/agascoig/vwp2?.tok=bccV1CVBYRRfg_eF&.dir=/Guest&.dnm=ComplexDoubleMatrixJava.zip&.src=bc
It appears that with gcj and a -f switch I can turn off the array
bounds checking.
Will a JVM ever be smart enough to know that if the array bound is a
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by: Sterten |
last post by:
when I define
int R;
and then later access it with
x=R;C=7;
....
but x happens to be <0 or >99 , then the program's behavious
becomes unpredictable.
Is there a way to prevent this ?
Is there a program or debugger or compiler which
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by: buda |
last post by:
Hi,
I've been wondering for a while now (and always forgot to ask :) what is the
exact quote from the Standard that forbids the use of (&array)
(when x >= number_of_columns) as stated in the FAQ 6.19
(http://www.eskimo.com/~scs/C-faq/q6.19.html).
Thanks.
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by: Flip |
last post by:
I'm reading the O'Reilly's Progamming C# book and I have a question about
array bounds checking. On page 174, near the top, they show an example
where c# does indeed to array bounds checking cause the example shows a
System.IndexOutOfRangeException being thrown. However, in the very next
section (Jagged arrays) they have warning section that says "Java
programmers take note: While Java does bounds checking on array use, C# does
not." ...
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by: ais523 |
last post by:
I've checked the FAQ for this and couldn't find the answer. Is the
following code snippet portable?
int a;
a=6;
printf("%d\n",(*a));
This prints "6" on my compiler. I've been told it's always legal, but
it seems slightly suspect to me. Can you really go out-of-bounds like
this on one of the 'sub-arrays' a, a, etc.?
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by: Pedro Graca |
last post by:
I run into a strange warning (for me) today (I was trying to improve
the score of the UVA #10018 Programming Challenge).
$ gcc -W -Wall -std=c89 -pedantic -O2 10018-clc.c -o 10018-clc
10018-clc.c: In function `main':
10018-clc.c:22: warning: array subscript has type `char'
I don't like warnings ... or casts.
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by: Adam Warner |
last post by:
Hi all,
One cannot return a pointer to an array type in C because C has no first
class array types. But one can return a pointer to a struct containing an
incomplete array via the illegal but widely supported zero array struct
hack:
#include <stdlib.h>
typedef struct byte_vector_t byte_vector_t;
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by: jacob navia |
last post by:
We hear very often in this discussion group that
bounds checking, or safety tests are too expensive
to be used in C.
Several researchers of UCSD have published an interesting
paper about this problem.
http://www.jilp.org/vol9/v9paper10.pdf
Specifically, they measured the overhead of a bounds
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by: vippstar |
last post by:
The subject might be misleading.
Regardless, is this code valid:
#include <stdio.h>
void f(double *p, size_t size) { while(size--) printf("%f\n", *p++); }
int main(void) {
double array = { { 3.14 }, { 42.6 } };
f((double *)array, sizeof array / sizeof **array);
return 0;
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by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
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by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
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by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
|
by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
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by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
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by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
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by: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
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by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
|
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by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
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