foo.cc: In function 'int qsort(int, int)':
foo.cc:35:1: warning: no return statement in function returning non-void [-Wreturn-type]
   35 | }
      | ^
foo.cc: In function 'int qsort1(int, int)':
foo.cc:64:1: warning: no return statement in function returning non-void [-Wreturn-type]
   64 | }
      | ^
foo.cc: In function 'int qsort(int, int)':
foo.cc:4:5: warning: infinite recursion detected [-Winfinite-recursion]
    4 | int qsort(int l,int r)
      |     ^~~~~
foo.cc:32:18: note: recursive call
   32 |             qsort(l,y);
      |             ~~~~~^~~~~
foo.cc:34:18: note: recursive call
   34 |             qsort(x,r);
      |             ~~~~~^~~~~
foo.cc: In function 'int qsort1(int, int)':
foo.cc:36:5: warning: infinite recursion detected [-Winfinite-recursion]
   36 | int qsort1(int l,int r)
      |     ^~~~~~
foo.cc:61:19: note: recursive call
   61 |             qsort1(l,y);
      |             ~~~~~~^~~~~
foo.cc:63:19: note: recursive call
   63 |             qsort1(x,r);
      |             ~~~~~~^~~~~

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