Printing float or integer to console

[Pandagineer]

Hello,

In app_hello_world, let's say I wanted to print a float or integer (rather than string) to the Console. I tried this by inserting the lines:

float x;
x = 3.0;
DEBUG_PRINT(x);

But when making, I got an error. It seems that DEBUG_PRINT only accepts a string. My question is: in C#, how do I convert an integer or float to a string? (In Python, this is easy using the str() function.)

Thanks!

[ataffanel]

Hi!

First of all, the Crazyflie firmware is not written in C# but in C. The difference can be quite big between the two languages.

The DEBUG_PRINT() macro is emulating the standard C printf() fonction. The first argument is a format string and then a variable amount of arguments for the data. Your (expanded) example can be implemented by:

float x;
x = 3.0;
int y;
y = 42;
DEBUG_PRINT("%f %d", (double)x, y);   // This will print "3.0 42"

Note that not all the standard C format syntax will work, but the most common/simple will.

[Pandagineer]

My college C classes are all rushing back!

This worked. Thank you. (I did not realize C# was a different language. I appreciate the correction.)