/in/foo.c: In function 'main':
/in/foo.c:12:19: warning: implicit declaration of function 'sqrt' [-Wimplicit-function-declaration]
   12 |                 y=sqrt(5*x+10);
      |                   ^~~~
/in/foo.c:2:1: note: include '<math.h>' or provide a declaration of 'sqrt'
    1 | #include <stdio.h>
  +++ |+#include <math.h>
    2 | 
/in/foo.c:12:19: warning: incompatible implicit declaration of built-in function 'sqrt' [-Wbuiltin-declaration-mismatch]
   12 |                 y=sqrt(5*x+10);
      |                   ^~~~
/in/foo.c:12:19: note: include '<math.h>' or provide a declaration of 'sqrt'
/in/foo.c:14:19: warning: implicit declaration of function 'pow' [-Wimplicit-function-declaration]
   14 |                 y=pow(x,3);
      |                   ^~~
/in/foo.c:14:19: note: include '<math.h>' or provide a declaration of 'pow'
/in/foo.c:14:19: warning: incompatible implicit declaration of built-in function 'pow' [-Wbuiltin-declaration-mismatch]
/in/foo.c:14:19: note: include '<math.h>' or provide a declaration of 'pow'
/in/foo.c:16:9: warning: 'y' may be used uninitialized [-Wmaybe-uninitialized]
   16 |         printf("%.3f\n",y);
      |         ^~~~~~~~~~~~~~~~~~
/in/foo.c:5:14: note: 'y' was declared here
    5 |     double x,y;
      |              ^