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by: red floyd |
last post by:
Is there any way to retrieve the filename given to a std::ofstream
(passed in constructor or in ofstream::open())?
Or, should I derive from ofstream (should probably be a template to
handle ifstream and fstream as well, but I'm typing on the fly)
yes, I know the syntax may be off...
class onamedfstream : public ofstream {
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by: Chase Bradford |
last post by:
Hey all
I have a class Foo, and I'm trying to overload the << operator for both
the ostream and ofstream for it. This way I should have two seperate
formats for output, one for files and another for the screen. Right now the
two declarations are:
std::ofstream& operator<<( std::ofstream &fos, const Foo &theClass);
std::ostream& operator<<( std::ostream &fos, const Foo &theClass);
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by: Marina |
last post by:
I get an "access violation" when I use someting like this:
@@@@@@@@@@@@@@
string tempo;
const char *output;
vector <ofstream> outs(3);
....
....
open_output=(const char *)tempo.c_str();
ofstream out0(open_output, ios::out | ios::out);
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by: ma740988 |
last post by:
There's no way to use the STL algorithm copy to print an outfile
(essentially an ofstream)? So now:
int main()
{
std::ifstream InFile( "exercise15.txt");
std::ofstream ToFile( "NewFile.txt" );
////////////////////////////
// Alternative 1
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by: slyphiad |
last post by:
i'm kinda new at c++ so be patient ^_^
i was just wondering if u guys could help me to solve this problem
that i had.
i'm trying to create 5 sequential files using ofstream.
this is what i did below:
char filename =
{"quest.01.cpp","quest.02.cpp","quest.03.cpp","quest.04.cpp","quest.05.cpp"};
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by: Squid Seven |
last post by:
I'm trying to use a pointer to an ofstream object and having problems:
ofstream *sessionFile = NULL;
if( directory == "" )
sessionFile = new ofstream( fileName.c_str(), ios::out );
else
{
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by: manontheedge |
last post by:
i'm working on a C++ program that uses operator overloads (which i'm just learning to use), and i have the ostream working fine, but i'm thinking i'm using it wrong somehow because the ofstream doesn't work. Here's some code fragments...
class matrix
{
public:
......
friend ostream& operator << ( ostream& os, matrix& m );
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by: Gary Wessle |
last post by:
Hi
I have a map<string, doublem_temperatures which gets updated
often.
I need to save the data to files corresponding to each string each
time the map is updated, I am expecting about 80 files in total.
how do I go about it?, do I set a vector<ofstream*cities; something
like
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by: aaragon |
last post by:
Hello, does anyone have a clue about this error? and how to solve it?
It seems to be trivial to me, but not for the compiler. I'm using g++
4.2 on an Ubuntu Linux system:
// main()
....
std::ofstream fout;
fout.open("hello.out");
fout<<setfill('-')<<setw(20)<<"-"<<setfill(' ')<<endl;
fout<<"hello "; // this is line 139
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by: yeshello54 |
last post by:
Quick question on c++ ofstream. in my main i have it declared as int main(int arg, char*argv). so that when i run the following command ./program.cpp test.txt it will run my program and pass the test.txt file into it. My question is how do i save my output file as the file name i passed in. i know to use ofstream but im not sure how to pass in the file i passed into my program to test. I have the following code.any help would be great. thanks
...
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by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
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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...
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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: 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: 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: 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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