appending a float to a stringstream in cpp

Question

I am trying to write a sentence inside a stringstream. Here is my sketch:

stringstream is;
float position_angle0;

position_angle0=12.5;

is << "setpos1 0 %d ", int(position_angle0);

I guess there is something wrong because it seems not working. Can you please tell me the correct way to do this?

Answer 1

Standard streams do not take type format specifiers – there's no need, as they're already implicitly type-safe.

is << "setpos1 0 " << static_cast<int>(position_angle0) << ' ';

Answer 2

It should look like this:

is << "setpos1 0 " << static_cast<int>(position_angle0);