摘要： int maxlen=1024*1024; std::vector<byte> buf; FILE* f= fopen( "c:/f.jpg", "rb" ); string signature(maxlen, ' '); maxlen = fread( &signature[0], 1, maxlen, f ); fclose(f); buf.resize(maxlen); signature = signature.substr(0, maxlen); memcpy(&buf[0],&signatu 阅读全文