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View Compilation Error

0_0_7809599_21133.cpp
0_0_7809599_21133.cpp(17) : error C2451: “std::map<_Kty,_Ty>::iterator”类型的条件表达式是非法的
        with
        [
            _Kty=std::string,
            _Ty=int
        ]
        没有可用于执行该转换的用户定义的转换运算符,或者无法调用该运算符


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