View Compilation Error

0_0_28506132_31604.cpp:5:1: error: stray '\343' in program
 1.0,n*(n+1) 。
 ^
0_0_28506132_31604.cpp:5:1: error: stray '\200' in program
0_0_28506132_31604.cpp:5:1: error: stray '\202' in program
0_0_28506132_31604.cpp:9:1: error: stray '\343' in program
 double。
 ^
0_0_28506132_31604.cpp:9:1: error: stray '\200' in program
0_0_28506132_31604.cpp:9:1: error: stray '\202' in program
0_0_28506132_31604.cpp:4:1: error: 'sum' does not name a type
 sum=n*(n+1)*(n+2)/6.0;
 ^
0_0_28506132_31604.cpp:5:1: error: expected unqualified-id before numeric constant
 1.0,n*(n+1) 。
 ^
0_0_28506132_31604.cpp:9:1: error: expected unqualified-id at end of input
 double。
 ^