foo.c: In function 'pd':
foo.c:23:1: warning: control reaches end of non-void function [-Wreturn-type]
   23 | }
      | ^
foo.c: In function 'cjpd':
foo.c:42:1: warning: control reaches end of non-void function [-Wreturn-type]
   42 | }
      | ^

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