How to cut decimal off without rounding in C

Question

How do I cut off decimal places in C without rounding?

For example if the number is 4.48

it will just show 4.4

%.1f

Answer 1

If your compiler supports C99, you should be able to use trunc() and friends:

float f = 4.56f;
f = truncf(f * 10.0) / 10.0;