0_0_21511180_2305.c 0_0_21511180_2305.c(20) : error C2061: 语法错误: 标识符“Union” 0_0_21511180_2305.c(20) : error C2059: 语法错误:“;” 0_0_21511180_2305.c(20) : error C2059: 语法错误:“类型”