Thank very much. I've found the reason, it's because the serialized data the binary data instead of text, so when stored into a char array, it somehow won't appear textually, but in fact it is there.
i'm sorry to have disturbed the forum with such silly question. On Friday, June 9, 2017 at 1:14:32 AM UTC+8, Bo Yang wrote: > > http://www.cplusplus.com/reference/string/string/string/ > std::string(buf) will be initialized with null terminated string. If the > serialized data contains 0, it will be truncated in the string. > I think you should use std::string(buf, n) > > On Thu, Jun 8, 2017 at 9:57 AM David Zhao <davi...@gmail.com <javascript:>> > wrote: > >> another example: >> #include "client.h" >> #include "proto/uMemcached.pb.h" >> >> int main() { >> >> //Client client("127.0.0.1", 27777); >> //client.run(); >> >> mcmessage::Query query; >> query.set_type(mcmessage::Query::SET); >> query.set_key("good"); >> query.set_value("bad"); >> >> std::string str; >> char buf[1024] = {0}; >> >> query.SerializeToString(&str); >> query.SerializeToArray(buf, query.ByteSize()); >> >> std::cout << "str: " << str << std::endl; >> >> std::cout << "buf: " << buf << std::endl; >> } >> >> run it, get: >> >>> str:goodâ–’bad >>> buf: >>> >> >> the buf is not filled. >> why..... >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Protocol Buffers" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to protobuf+u...@googlegroups.com <javascript:>. >> To post to this group, send email to prot...@googlegroups.com >> <javascript:>. >> Visit this group at https://groups.google.com/group/protobuf. >> For more options, visit https://groups.google.com/d/optout. >> > -- You received this message because you are subscribed to the Google Groups "Protocol Buffers" group. To unsubscribe from this group and stop receiving emails from it, send an email to protobuf+unsubscr...@googlegroups.com. To post to this group, send email to protobuf@googlegroups.com. Visit this group at https://groups.google.com/group/protobuf. For more options, visit https://groups.google.com/d/optout.
