Questions tagged [clog]
17 questions
130
votes
7 answers
What is the difference between cout, cerr, clog of iostream header in c++? When to use which one?
I tried researching the difference between cout, cerr and clog on the internet but couldn't find a perfect answer. I still am not clear on when to use which. Can anyone explain to me, through simple programs and illustrate a perfect situation on…
Arlene Batada
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28
votes
4 answers
Redirect C++ std::clog to syslog on Unix
I work on Unix on a C++ program that send messages to syslog.
The current code uses the syslog system call that works like printf.
Now I would prefer to use a stream for that purpose instead, typically the built-in std::clog. But clog merely…
kriss
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9
votes
5 answers
What directive can I give a stream to print leading zeros on a number in C++?
I know how to cause it to be in hex:
unsigned char myNum = 0xA7;
clog << "Output: " std::hex << int(myNum) << endl;
// Gives:
// Output: A7
Now I want it to always print a leading zero if myNum only requires one digit:
unsigned char myNum =…
WilliamKF
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4
votes
4 answers
How to redefine clog to tee to original clog and a log file?
I saw a useful start here:
http://www.cs.technion.ac.il/~imaman/programs/teestream.html
And it works great to make a new stream which goes to both clog and a log file.
However, if I try to redefine clog to be the new stream it does not work because…
WilliamKF
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4
votes
1 answer
When to use and the differences between clog and cerr in c++
When do I use std::clog and std::cerr in c++?
What's difference between clog << "test" << endl; and cerr << "test" << endl;?
Does clog << "0" without endl print directly with no buffer?
jiafu
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1
vote
1 answer
How to redefine clog's rdbuf() to be a tee to the original rdbuf() of clog and that of a log file?
Does anyone have an example of how to redefine the C++ built in clog to instead have a new associated rdbuf() which is processed to be a tee to the original clog.rdbuf() and the rdbuf() of a ofstream object to a log file on disk.
The intention is to…
WilliamKF
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1
vote
1 answer
add_subdirectory for cmake tensorflow lite fails on subsequent runs
I am trying to include tensorflow-lite in a project per the minimal example here: Build TensorFlow Lite with CMake. Specifically, I'm trying to add_subdirectory the CMakeLists.txt for tflite, as recommended.
This works when the project is first…
ColinBroderick
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1
vote
0 answers
Clogit function in CEDesign not converge
I designed a CE Experiment using the package support.CEs. I generated a CE Design with 3 attributes an 4 levels per attribute. The questionnaire had 4 alternatives and 4 blocks
des1 <- rotation.design(attribute.names = list(
Qualitat = c("Aigua…
Marc Vives
- 21
- 3
1
vote
2 answers
C++ writing to std::out and std:clog simultaneously
I would like to create a stream-like class through which I can write to both std::out and std::clog.
I have the following code, but the problem is that it only writes to std::clog, while the output on the console is not as expected (strangely, it…
Stingery
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1
vote
1 answer
Sakai 10 clog not compiling :(
I'm having a little trouble on compiling the clog tool for sakai 10...
https://github.com/adrianfish/clog/issues/5
I suspect adrian is busy on the 11 build at the moment, but I'm wondering if it's actually something that can be fixed by the user, or…
andmar8
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1
vote
2 answers
How to detect unhandled exception due to disk full?
My application ran into a disk full error and somehow, as a result of the disk being full, an unhandled exception was thrown resulting in the set_terminate() handler being invoked.
Normally, I would get some kind of stack trace in my log file so I…
WilliamKF
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0
votes
1 answer
Why doesn't my change to clog stick?
I think I'm failing to understand some finer point of C++. I want to set up a log of what my program does, and discovered std::clog, which seems to do what I want in theory, but in practice it doesn't.
If I do the following, clog works as expected…
MighMoS
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0
votes
1 answer
would clog and cout in c++ behave differently in outputing the value?
I am expecting a similar behavior for Cout and Clog since both are buffered outputs. But when i am trying, it comes out different.
COUT:
int main()
{
cout<<"Hello World" ;
while(1);
return 0;
}
Output: Nothing --> Since Cout is not…
0
votes
1 answer
How can I resolve the occuring ambiguity when using clog for computing the natural logarithm with complex numbers?
I have a complex double array eigenvalues of which I want to get the natural logarithm of each entry by using clog.
for (int i = 0; i < n; ++i)
{
qq[i] = clog(eigenvalues[i]);
}
I already dropped the using namespace std; but am still getting…
dYTe
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0
votes
1 answer
How to redefine both cerr and clog to both tee to a shared log file?
A related question here shows how to do this with just clog:
How to redefine clog to tee to original clog and a log file?
The question now is how to also do this for cerr at the same time. With the above question, output to cerr does not end up in…
WilliamKF
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