0_0_13065286_15814.cpp 0_0_13065286_15814.cpp(10) : error C2065: “sum”: 未声明的标识符 0_0_13065286_15814.cpp(21) : error C2562: “main”:“void”函数返回值 0_0_13065286_15814.cpp(2) : 参见“main”的声明