foo.c: In function 'main':
foo.c:10:15: warning: left-hand operand of comma expression has no effect [-Wunused-value]
   10 |         if(x>0,y>0)
      |               ^
foo.c:12:20: warning: left-hand operand of comma expression has no effect [-Wunused-value]
   12 |         else if(x<0,y>0)
      |                    ^
foo.c:14:20: warning: left-hand operand of comma expression has no effect [-Wunused-value]
   14 |         else if(x<0,y<0)
      |                    ^
foo.c:16:20: warning: left-hand operand of comma expression has no effect [-Wunused-value]
   16 |         else if(x>0,y<0)
      |                    ^

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