/in/foo.c:1:1: warning: data definition has no type or storage class
    1 | PI = 3.1415
      | ^~
/in/foo.c:1:1: warning: type defaults to 'int' in declaration of 'PI' [-Wimplicit-int]
/in/foo.c:3:1: error: expected ',' or ';' before 'r'
    3 | r = int(input())
      | ^