how to printf a floating number in the format of 00.00 ?

[John_Lintern]

How can I force the floating variables to be displayed in the format of say 00.00 for example ?

I am trying to send some variables down the RS232, some of which are integers and some of which are floating numbers.

The integers are displayed but the floating values move about and overwrite other text on the screen.

I am using CCS Serial Port Monitor to display the values.

The printf statement I am using is....

[Ttelmah]

The first number in a printf, is the _total field width_. A zero in front of this, signifies to pre-fill with zeros. There is a decimal point seperator allowed to specify the part after the DP.
To get what you want (two trailing zeros), in a field with two leading zeros, you need:

"%05.2f"

I'd possibly suggest using:

"%05.2g"

which will round the last digit, rather than just truncating.
This gives a minimum of a five character field (2 digits each side of the DP), filled with zero in front, and with 2 digits after the DP.

Best Wishes

[bertronicom]

fprintf(CH1,"V %3.2f L %3.2f \r\n",V1, Lenght1);

Try to code this, it's working now