/in/foo.cc: In function 'int main()':
/in/foo.cc:40:18: warning: right operand of comma operator has no effect [-Wunused-value]
   40 |     delete[] a,b,c;
      |                  ^
/in/foo.cc:40:19: warning: right operand of comma operator has no effect [-Wunused-value]
   40 |     delete[] a,b,c;
      |                   ^