sprintf equilvalent in C++ ?

[tvn007]

Hi,
Is there a sprintf equilvalent in C++ ?

I have to do the following segment of my code:
////////////////////////////////////////////////////////////////
string test("twice");
char assignment[40];
sprintf (assignment, "do run \"%s\";",test.c_str());
///////////////////////////////////////////////////////////////////////

 

[Marcin Kalicinski]

You can use stringstream:

std::stringstream stream;
stream << "do run \"" << test << "\";";
std::string assignment(stream.str());

or alternatively use boost::format (see www.boost.org)

cheers,
Marcin

 

[Colander]

std::string has an append function;

std::string assignment("do run \"");
assignment.append(test);
assignment += "\""; // += aliasses append...

 

[tvn007]

Marcin , your solution seems to work since not only string, I have to
add integer and double to sprintf.

Thanks

 

[Dirk Clasen]

int someInt = 5;
double someDouble = 10.12;
std::stringstream stream;
stream << "do run \"" << test << "\";" << someInt << " " << someDouble;
std::string assignment(stream.str());

 

[John Harrison]

Marcin , your solution seems to work since not only string, I have to
add integer and double to sprintf.

Thanks

Boost::format works with integer and double, and is just like sprintf.
Check it out.

john