foo.c:1:1: warning: data definition has no type or storage class
    1 | a={")":"("}
      | ^
foo.c:1:1: warning: type defaults to 'int' in declaration of 'a' [-Wimplicit-int]
foo.c:1:4: warning: initialization of 'int' from 'char *' makes integer from pointer without a cast [-Wint-conversion]
    1 | a={")":"("}
      |    ^~~
foo.c:1:4: note: (near initialization for 'a')
foo.c:1:4: error: initializer element is not computable at load time
foo.c:1:4: note: (near initialization for 'a')
foo.c:1:7: error: expected '}' before ':' token
    1 | a={")":"("}
      |   ~   ^
foo.c:2:1: error: expected ',' or ';' before 'b'
    2 | b,c=a.values(),a.keys()
      | ^

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