Re: Compilation d'un programme C

> warning: implicit declaration of function ‘sin’ [-Wimplicit-function-declaration]
>    20 |   printf ("%g\n", sin (1)) ;
>       |                   ^~~
> test.c:5:1: note: include ‘<math.h>’ or provide a declaration of ‘sin’
>     4 | #include <sys/time.h>
>   +++ |+#include <math.h>