gistfile1.txt

m.c:3:1: warning: return type defaults to ‘int’ [-Wimplicit-int]
    3 | main() {
      | ^~~~
m.c: In function ‘main’:
m.c:4:16: warning: implicit declaration of function ‘malloc’ [-Wimplicit-function-declaration]
    4 | printf("%p\n", malloc(0));
      |                ^~~~~~
m.c:4:16: warning: incompatible implicit declaration of built-in function ‘malloc’
m.c:2:1: note: include ‘<stdlib.h>’ or provide a declaration of ‘malloc’
    1 | #include <stdio.h>
  +++ |+#include <stdlib.h>
    2 |

arch-desktop :: ~/w » ./a.out
0x55ec86e5b2a0

m.c

#include <stdio.h>

main() {
printf("%p\n", malloc(0));
}