/in/foo.c:1:1: warning: data definition has no type or storage class
    1 | a,b,c=float(input（边长1,边长2,边长3））
      | ^
/in/foo.c:1:1: warning: type defaults to 'int' in declaration of 'a' [-Wimplicit-int]
/in/foo.c:1:3: warning: type defaults to 'int' in declaration of 'b' [-Wimplicit-int]
    1 | a,b,c=float(input（边长1,边长2,边长3））
      |   ^
/in/foo.c:1:5: warning: type defaults to 'int' in declaration of 'c' [-Wimplicit-int]
    1 | a,b,c=float(input（边长1,边长2,边长3））
      |     ^
/in/foo.c:1:7: error: expected expression before 'float'
    1 | a,b,c=float(input（边长1,边长2,边长3））
      |       ^~~~~