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0_0_25936431_5368.cpp
0_0_25936431_5368.cpp(35) : error C2065: “ans”: 未声明的标识符
0_0_25936431_5368.cpp(37) : error C2059: 语法错误:“return”
0_0_25936431_5368.cpp(38) : error C2059: 语法错误:“}”
0_0_25936431_5368.cpp(38) : error C2143: 语法错误 : 缺少“;”(在“}”的前面)