/in/foo.c:1:1: warning: data definition has no type or storage class
    1 | h, w = map(float, input().split(','))
      | ^
/in/foo.c:1:1: warning: type defaults to 'int' in declaration of 'h' [-Wimplicit-int]
/in/foo.c:1:4: warning: type defaults to 'int' in declaration of 'w' [-Wimplicit-int]
    1 | h, w = map(float, input().split(','))
      |    ^
/in/foo.c:1:8: warning: implicit declaration of function 'map' [-Wimplicit-function-declaration]
    1 | h, w = map(float, input().split(','))
      |        ^~~
/in/foo.c:1:12: error: expected expression before 'float'
    1 | h, w = map(float, input().split(','))
      |            ^~~~~
/in/foo.c:2:1: error: expected ',' or ';' before 'bmi'
    2 | bmi = w / (h ** 2)
      | ^~~