foo.c:1:1: warning: data definition has no type or storage class
    1 | W=int(input("请输入测试项目数量"))
      | ^
foo.c:1:1: warning: type defaults to 'int' in declaration of 'W' [-Wimplicit-int]
foo.c:1:3: error: expected expression before 'int'
    1 | W=int(input("请输入测试项目数量"))
      |   ^~~

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