Output stream class to operate on strings.
Questions tagged [ostringstream]
150 questions
1
vote
1 answer
Convert double to string quickly observing given precision
I have a C++ program using SDL. During rendering, I need to draw some graphics components. I sometimes need to convert double variables, rounded to one decimal, to std::string.
For this, I'm currently using a ostringstream object and it works…
Grégoire Borel
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1
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2 answers
C++ - Corrupted String
I'm quite new to C++, but I'm used to some coding with R language. I started, a few weeks ago, to put together a small application that should copy and rename file pairs (.seq/.ab1). Result from a DNA sequencer analysis (renaming hundreds of them…
Rodrigo
- 155
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- 11
1
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0 answers
Using >> operator stop my stringstream to get chars from a file stream
//I know it is bad using (namespace std) but I'm editing a "attached project"
// as exercise from my Professor.
//All required libraries: iostream, fstream, sstream, stdlib are included.
stringstream stringas;
ifstream fromfile;
…
Simon T04D
- 11
- 4
1
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2 answers
basic_stringbuf has no member named 'freeze'
The following code fails to compile:
#include
#include
int main()
{
std::ostrstream strm;
strm.rdbuf()->freeze(0);
}
I get the following errors on compilation:
g++…
pankaj kushwaha
- 369
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1
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2 answers
Output a ostringstream to file
I currently do this to write the contents of an ostringstream to a file:
... // -- Loop 1 Start
std::ostringstream osStr;
... // -- Loop 2 Start
cv::string s(osStr.str());
std::istringstream iss(s);
cv::vector subVec;
…
fakeaccount
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1
vote
2 answers
c++ extract just numbers from an ostringstream
If I have an ostringstream that contains various numbers separated by -
(That's: space - space btw)
Could I extract each number individually?
fakeaccount
- 933
- 4
- 13
- 23
1
vote
2 answers
Redirect from a std::ostringstream to another std::ostringstream
I need write data from some std::ostringstream to another std::ostringstream. Of course, I can use str() function
std::ostringstream in;
std::ostringstream out;
in << "just a test"; // it's just an example. I mean that stream in is filled…
Loom
- 9,768
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1
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4 answers
How do I use std::ends to overwrite the string in an std::ostringstream?
I want to overwrite the string in an std::ostringstream but std::ends isn't working. Is this a problem with VS2012, or am I doing something wrong? Here is example code:
std::ostringstream foo;
foo << "1,2,3,4,5,6";
std::cout << foo.str(); //…
Jonathan Mee
- 37,899
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1
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1 answer
Converting a char array to something that can be appended to a ostringstream
std::ostringstream parmStream;
char parmName[1024];
THTTPUrl::Encode(parmName, pParm->Name().c_str(), 1024);
//I want to add the value of the paramName to the parmStream worked b4 when parmName was a string but obv not now
parmStream << "&" <<…
wmitchell
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1
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1 answer
First SFML 2.1 GUI project crash
Today i started writing my firs SFML program, it is supposed to be a Snake game, and it was all going pretty well, until I started making the two dimension class array, which was supposed to hold the information of each tile. The some wierd stuff…
user2468893
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4 answers
Reverse an ostringstream by line
ostringstream ss;
ss << "(1,2)\n" << "(1,3)\n" << "(1,4)\n" ;
cout << ss.str();
should print the following:
(1,2)
(1,3)
(1,4)
How could i reverse the output by line so that it prints:
(1,4)
(1,3)
(1,2)
GoBlue_MathMan
- 1,048
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1
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1 answer
Mac OS X port crashes in pthread_setspecific in glibstdc++ vsnprintf - how to troubleshoot?
I'm testing a Mac OS X port of my multithreaded server. It starts up, but it dies in vsnprintf soon after the first client request is taken by a worker thread.
It seems that vsnprintf is trying to manipulate some thread local memory with…
Erik Olson
- 1,154
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1
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2 answers
C++ ostringstream strange behavior when chaining in cout is used
I am a C++ beginner ( came from Java ). I have the following code:
//#include
#include
#include
#include
#include
#include
#include
#include
#include…
aureliangtx
- 317
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- 18
1
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1 answer
Setting std::io_base flags for custom stream class
I have a custom class called Stream
class Stream
public:
Stream& operator<<(int i) { stream_ << i; return *this;}
template
Stream& operator<<(const CustomClass& c) { stream_ << c.toString() /*…
abumusamq
- 780
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1
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1 answer
QString and stdstring combination doesnt work in std::stringstream - compile error
```
#include
#include
#include
class Printer {
public:
inline std::ostream& operator<<(const std::string& str) {
stream << str;
return stream;
}
inline std::ostream& operator<<(int numb) {
…
abumusamq
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