Question

C# has a syntax feature where you can concatenate many data types together on 1 line.

string s = new String(); s += 'Hello world, ' + myInt + niceToSeeYouString; s += someChar1 + interestingDecimal + someChar2; 

What would be the equivalent in C++? As far as I can see, you’d have to do it all on separate lines as it doesn’t support multiple strings/variables with the + operator. This is OK, but doesn’t look as neat.

string s; s += 'Hello world, ' + 'nice to see you, ' + 'or not.'; 

The above code produces an error.

Answer 1

#include <sstream> #include <string>  std::stringstream ss; ss << 'Hello, world, ' << myInt << niceToSeeYouString; std::string s = ss.str(); 

Take a look at this Guru Of The Week article from Herb Sutter: The String Formatters of Manor Farm