0_0_28793795_3343.c 0_0_28793795_3343.c(3) : error C2061: 语法错误: 标识符“_RPN” 0_0_28793795_3343.c(3) : error C2059: 语法错误:“;” 0_0_28793795_3343.c(3) : error C2059: 语法错误:“类型”