/in/foo.c: In function 'input':
/in/foo.c:58:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
/in/foo.c: In function 'ret':
/in/foo.c:45:4: warning: 'p' may be used uninitialized in this function [-Wmaybe-uninitialized]
   }printf("%d ", p);
    ^~~~~~~~~~~~~~~~
/in/foo.c:31:4: warning: 't' may be used uninitialized in this function [-Wmaybe-uninitialized]
   }printf("%d ", t);
    ^~~~~~~~~~~~~~~~