View Compilation Error

0_0_17050444_16639.cpp
0_0_17050444_16639.cpp(4) : error C2143: 语法错误 : 缺少“;”(在“.”的前面)
0_0_17050444_16639.cpp(5) : error C2065: “B”: 未声明的标识符
0_0_17050444_16639.cpp(6) : error C2065: “SUM”: 未声明的标识符
0_0_17050444_16639.cpp(6) : error C2065: “B”: 未声明的标识符
0_0_17050444_16639.cpp(7) : error C2065: “sum”: 未声明的标识符