Question

I wonder if it is possible and how to implement in C++ crossplatform, (C99, C++0x independent ) snprintf? Is there such in boost? (I wonder about what is the C++ idiom to replace snprintf(4)?)

Answer 1

std::ostringstream would be an alterntive to using snprintf:

char buf[1024];
snprintf(buf, 1024, "%d%s", 4, "hello");

Equivalent:

#include <sstream>

std::ostringstream s;
s << 4 << "hello";
// s.str().c_str(); // This returns `const char*` to constructed string.

There is also boost::lexical_cast:

std::string s = boost::lexical_cast<std::string>(4) +
                    boost::lexical_cast<std::string>("hello");