/in/foo.c: In function 'main':
/in/foo.c:11:18: warning: implicit declaration of function 'pow' [-Wimplicit-function-declaration]
   11 |         if(num==(pow(a,3)+pow(b,3)+pow(c,3)))
      |                  ^~~
/in/foo.c:2:1: note: include '<math.h>' or provide a declaration of 'pow'
    1 | #include <stdio.h>
  +++ |+#include <math.h>
    2 | 
/in/foo.c:11:18: warning: incompatible implicit declaration of built-in function 'pow' [-Wbuiltin-declaration-mismatch]
   11 |         if(num==(pow(a,3)+pow(b,3)+pow(c,3)))
      |                  ^~~
/in/foo.c:11:18: note: include '<math.h>' or provide a declaration of 'pow'