foo.c:1:1: warning: data definition has no type or storage class
    1 | cj = input()
      | ^~
foo.c:1:1: warning: type defaults to 'int' in declaration of 'cj' [-Wimplicit-int]
foo.c:1:6: warning: implicit declaration of function 'input' [-Wimplicit-function-declaration]
    1 | cj = input()
      |      ^~~~~
foo.c:1:6: error: initializer element is not constant
foo.c:2:1: error: expected ',' or ';' before 'match'
    2 | match cj:
      | ^~~~~

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