/in/foo.c:1:1: warning: data definition has no type or storage class
    1 | nums = input().split(',')
      | ^~~~
/in/foo.c:1:1: warning: type defaults to 'int' in declaration of 'nums' [-Wimplicit-int]
/in/foo.c:1:8: warning: implicit declaration of function 'input' [-Wimplicit-function-declaration]
    1 | nums = input().split(',')
      |        ^~~~~
/in/foo.c:1:15: error: request for member 'split' in something not a structure or union
    1 | nums = input().split(',')
      |               ^
/in/foo.c:2:1: error: expected ',' or ';' before 'num1'
    2 | num1 = float(nums[0])
      | ^~~~