could anyone tell me or point me to a simple example of how to append an int to a stringstream containing the word "Something" (or any word)?
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3 Answers
stringstream ss;
ss << "Something" << 42;
For future reference, check this out.
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I'd probably do something on this general order:
#include <string>
#include <sstream>
#include <iostream>
int main() {
std::stringstream stream("Something ");
stream.seekp(0, std::ios::end);
stream << 12345;
std::cout << stream.str();
return 0;
}
With a normal stream, to add to the end, you'd open with std::ios::ate or std::ios::app as the second parameter, but with string streams, that doesn't seem to work dependably (at least with real compilers -- neither gcc nor VC++ produces the output I'd expect when/if I do so).
2 Comments
If you are already using boost, it has lexical_cast that can be be used for this. It is basically a packaged version of the above, that works on any type that can be written to and read from a stream.
string s("something");
s += boost::lexical_cast<string>(12);
Its probably not worth using if you aren't using boost already, but if you are it can make your code clearer, especially doing something like
foo(string("something")+boost::lexical_cast<string>(12));
