How am I incorrectly using the round() function in C?

Question

I\'m getting unexpected results from the round() and roundf() functions in the math.h library. Here is the sample code:

#         


        

Answer 1

One more "works on my machine" on Ubuntu with gcc version 4.3.2.

$ ./a.out
1.000000
1.000000

I do get a couple of warnings when I compile, though.

$ gcc -lm round.c
round.c: In function ‘main’:
round.c:11: warning: incompatible implicit declaration of built-in function ‘roundf’
round.c:12: warning: incompatible implicit declaration of built-in function ‘round’