/in/foo.c:1:1: warning: data definition has no type or storage class
    1 | bian=input("请输入三角形的三边，并以逗号(英文状态）隔开 :")
      | ^~~~
/in/foo.c:1:1: warning: type defaults to 'int' in declaration of 'bian' [-Wimplicit-int]
/in/foo.c:1:6: warning: implicit declaration of function 'input' [-Wimplicit-function-declaration]
    1 | bian=input("请输入三角形的三边，并以逗号(英文状态）隔开 :")
      |      ^~~~~
/in/foo.c:1:6: error: initializer element is not constant
/in/foo.c:2:1: error: expected ',' or ';' before 'a'
    2 | a,b,c=map(int,bian.split(','))
      | ^