foo.cc: In function 'int main()':
foo.cc:7:8: warning: left operand of comma operator has no effect [-Wunused-value]
    7 |  -10000<a,b,c<10000;
      |  ~~~~~~^~
foo.cc:7:15: warning: right operand of comma operator has no effect [-Wunused-value]
    7 |  -10000<a,b,c<10000;
      |               ^~~~~
foo.cc:7:14: warning: right operand of comma operator has no effect [-Wunused-value]
    7 |  -10000<a,b,c<10000;
      |             ~^~~~~~
foo.cc:8:7: warning: statement has no effect [-Wunused-value]
    8 |  (a+b)*c;
      |  ~~~~~^~

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