I'm coming from a c# environment and I was wondering something instead of doing things on multiple lines...how to do it in one

example: [C#]

Code:
string foo="LOL";
string bar="zie lime";

foo+=" at " +bar + " all the time";

//output : "LOL at zie lime all the time"
I've tried that with std::string and just gives me a bunch of errors saying essentially that the + doesn't belong there

I was wondering if it's possible to do the same thing but in c++

right now I'm doing
[C++]
Code:
//lets say they are declared

foo+=" at ";
foo+=bar;
foo+= "all the time";
which makes the code really heavy