0_0_12038864_16627.cpp 0_0_12038864_16627.cpp(10) : error C2065: “ifn” : 未声明的标识符 0_0_12038864_16627.cpp(10) : error C2059: 语法错误 : “)” 0_0_12038864_16627.cpp(10) : error C2143: 语法错误 : 缺少“;”(在“break”的前面)