0_0_39507654_6407.cpp 0_0_39507654_6407.cpp(22) : error C2062: 意外的类型“int” 0_0_39507654_6407.cpp(28) : error C2065: “sum2”: 未声明的标识符 0_0_39507654_6407.cpp(31) : error C2065: “sum2”: 未声明的标识符