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by: Alan |
last post by:
hi all,
I want to define a constant length string, say 4
then in a function at some time, I want to set the string to a constant
value, say a
below is my code but it fails
what is the correct code?
many thx!
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by: M D |
last post by:
You know how you assume you know until you find out you don't know.
Well, I typed into a function definition "..., new String("")).
I know what I want. Everyone reading this knows what I want. However,
the 1.0 compiler has no idea what I want.
Can anyone share with me the syntax that will actually communicate the
concept to the compiler, please?
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by: Chad |
last post by:
Given the following code that achieves no useful purpose:
#include <string.h>
#include <stdio.h>
#include <string.h>
int manip(char *str) {
size_t len = strlen(str)-1;
if(len >= 3) {
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by: nospam |
last post by:
From the book
"There is an important difference between these definitions:
char amessage="now is the time";
char *pmessage ="now is the time";
snip
On the other hand, pmessage is a pointer, initialized to point a
string const; the pointer may be modified to point elsewhere, but the
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by: karthikbalaguru |
last post by:
Hi,
String constant being modifiable in C++ but, not modifiable in C.
that is,
In C++, the following example output will be "Mplusplus"
char *str1 = "Cplusplus";
*str1 = 'M';
In C, the above example will produce an error as we are trying to
modify a constant.
So, str1 is not a string constant in C++.
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by: sinbad |
last post by:
hi,
why does the following program gives an runtime error ,instead of
compilation error. anyone please shed
some light.
thanks
sinbad
------------------------------
int main()
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by: sinbad |
last post by:
hi,
how to concatenate a "hash defined" constant value to another "hash
defined" constant string. For example
#define ABC 100
#define MYSTR "The value of ABC is"
Now i need a string that will concatenate the value of ABC to MYSTR .
I need this at compile time.
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by: Ray Cassick |
last post by:
I can't believe why I had not noticed this before and why I never asked it
before...
When defining a string why is it not required to use the new keyword? Like:
Dim a As String = New String
You can do it when using the string type with some arguments in the
constructor but it look like there is no empty constructor on the String
class.
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by: mohanprasadgutta |
last post by:
hello everyone,
i have to write a program which will take a command line arguement which is nothing but a constant name. in the program i am trying to print out the value corresponding to the constant name provided.
i am aware of converting a string to a variable name as follows.
my $name = "mohan";
my $var = "name";
my $new = $$name;
print "your name is : " . $name . "\n";
But here i have to get the constant value corresponding to...
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by: Hendrik Schober |
last post by:
Hi,
this
#include <string>
class test {
typedef std::string::size_type size_type;
static const size_type x = std::string::npos;
};
doesn't compile using either VC9 ("expected constant expression")
or Comeau Online ("constant value is not known"). If I replace
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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: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
|
by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
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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...
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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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