View Compilation Error

0_0_20974922_27490.cpp:1:1: error: expected unqualified-id before '<' token
 <span style="font-size:14px;">//计算圆心角lat表示纬度,-90<=w<=90,lng表示经度
 ^
0_0_20974922_27490.cpp:13:2: error: expected unqualified-id before '<' token
 }</span>
  ^