/in/foo.c:1:1: warning: data definition has no type or storage class
    1 | input_string = input("请输入一个字符串: ")
      | ^~~~~~~~~~~~
/in/foo.c:1:1: warning: type defaults to 'int' in declaration of 'input_string' [-Wimplicit-int]
/in/foo.c:1:16: warning: implicit declaration of function 'input' [-Wimplicit-function-declaration]
    1 | input_string = input("请输入一个字符串: ")
      |                ^~~~~
/in/foo.c:1:16: error: initializer element is not constant
/in/foo.c:2:1: error: expected ',' or ';' before 'uppercase_count'
    2 | uppercase_count = 0
      | ^~~~~~~~~~~~~~~
/in/foo.c:14:12: error: stray '#' in program
   14 |     else:  # 其他字符
      |            ^