What to use instead of sprintf?

[cppaddict]

Hi,

Currently, whenever I need to work with numbers as strings, I am using
sprintf to do the conversion. This seems a little prehistoric. Is
there a current STL alternative?

One would think that std::string would support it somehow. But things
like:

std::string test = "hello";
test += 99;
std::cout << test;

do not result in "test99" as I would like. Can anyone help me out, or
is something in the printf family of functions still required?

Thanks,
cpp

 

[Nomak]

Hi, Hi

[...]

$ cat ss.cc
#include <iostream>
#include <sstream>
#include <string>

using std::cout;
using std::endl;
using std::string;
using std::stringstream;

int
main()
{
stringstream ss;

string test = "hello";

ss << test << 99;

cout << ss.str() << endl;

return 0;
}
$ g++ -W -Wall -std=c++98 ss.cc
$ ./a.out
hello99

 

[Phlip]

Nothing personal, dude, but do you, like, own a C++ tutorial on paper??

Currently, whenever I need to work with numbers as strings, I am using
sprintf to do the conversion. This seems a little prehistoric. Is
there a current STL alternative?

One would think that std::string would support it somehow. But things
like:

std::string test = "hello";
test += 99;
std::cout << test;

#include <sstream>
....
std::stringstream z;
z << "hello " << 99;
std::cout << z.str();

 

[cppaddict]

main()
{
stringstream ss;

string test = "hello";

ss << test << 99;

cout << ss.str() << endl;

return 0;
}

Yes, sstream. I knew there was something.

thank you Nomak and Philip.

 

[Default User]

Hi,

Currently, whenever I need to work with numbers as strings, I am using
sprintf to do the conversion. This seems a little prehistoric. Is
there a current STL alternative?

http://www.parashift.com/c++-faq-lite/misc-technical-issues.html#faq-38.1




Brian Rodenborn

 

[Misha Polatov]

Hi,

Currently, whenever I need to work with numbers as strings, I am using
sprintf to do the conversion. This seems a little prehistoric. Is
there a current STL alternative?

One would think that std::string would support it somehow. But things
like:

std::string test = "hello";
test += 99;
std::cout << test;

do not result in "test99" as I would like. Can anyone help me out, or
is something in the printf family of functions still required?

Thanks,
cpp

Take a look at boost format library.

http://boost.org/libs/format/index.html