foo.c: In function 'main':
foo.c:5:10: warning: left-hand operand of comma expression has no effect [-Wunused-value]
    5 |  int i=(2,3,4);
      |          ^
foo.c:5:12: warning: left-hand operand of comma expression has no effect [-Wunused-value]
    5 |  int i=(2,3,4);
      |            ^

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