foo.c: In function 'main':
foo.c:7:20: error: invalid initializer
    7 |         int b[100]=0;
      |                    ^
foo.c:21:27: warning: operation on 'c' may be undefined [-Wsequence-point]
   21 |                 b[c] = b[c++];
      |                          ~^~
foo.c:23:28: warning: operation on 'c' may be undefined [-Wsequence-point]
   23 |         } while (b[c] > b[c++]);
      |                           ~^~

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