/in/foo.c:2:5: warning: data definition has no type or storage class
    2 |     num1, num2 = map(float, input().split(','))
      |     ^~~~
/in/foo.c:2:5: warning: type defaults to 'int' in declaration of 'num1' [-Wimplicit-int]
/in/foo.c:2:11: warning: type defaults to 'int' in declaration of 'num2' [-Wimplicit-int]
    2 |     num1, num2 = map(float, input().split(','))
      |           ^~~~
/in/foo.c:2:18: warning: implicit declaration of function 'map' [-Wimplicit-function-declaration]
    2 |     num1, num2 = map(float, input().split(','))
      |                  ^~~
/in/foo.c:2:22: error: expected expression before 'float'
    2 |     num1, num2 = map(float, input().split(','))
      |                      ^~~~~
/in/foo.c:3:5: error: expected ',' or ';' before 'operator'
    3 |     operator = input()
      |     ^~~~~~~~
/in/foo.c:11:24: error: stray '#' in program
   11 |         if num2 == 0:  # 增加除数为0的判断
      |                        ^