struct

问题 I'm trying to save a struct into a .dat file and read it back in later. struct myStruct{ char **one; mytype **two; mytype2 *three; } With an assigning function: struct MyStruct get_struct() = { char **pi = ...; mytype **pa = ...; mytype2 **po = ...; MyStruct n = {pi, pa, po}; return n; } I originally tried to save this struct into a .dat file by doing this: struct MyStruct s = get_struct(); myoutfile = fopen("file.dat", "w"); if (myoutfile == NULL) { fprintf(stderr, "\nError opend file\n");

问题 I'm trying to save a struct into a .dat file and read it back in later. struct myStruct{ char **one; mytype **two; mytype2 *three; } With an assigning function: struct MyStruct get_struct() = { char **pi = ...; mytype **pa = ...; mytype2 **po = ...; MyStruct n = {pi, pa, po}; return n; } I originally tried to save this struct into a .dat file by doing this: struct MyStruct s = get_struct(); myoutfile = fopen("file.dat", "w"); if (myoutfile == NULL) { fprintf(stderr, "\nError opend file\n");

问题 I was looking for how to cast the interface to a struct, but I do not how I can not do it. I will try to explain my problem. type Result struct { Http_code int Http_msg string Response interface{}} This structure is returned by a function that makes an HTTP request to the server, on the other hand, I have different types of structure to wrap the response. And this is the struct which I want to cast the interface. type ResHealth struct { Type string Get_health struct { Healthy bool }} My

问题 I was looking for how to cast the interface to a struct, but I do not how I can not do it. I will try to explain my problem. type Result struct { Http_code int Http_msg string Response interface{}} This structure is returned by a function that makes an HTTP request to the server, on the other hand, I have different types of structure to wrap the response. And this is the struct which I want to cast the interface. type ResHealth struct { Type string Get_health struct { Healthy bool }} My

问题 I was looking for how to cast the interface to a struct, but I do not how I can not do it. I will try to explain my problem. type Result struct { Http_code int Http_msg string Response interface{}} This structure is returned by a function that makes an HTTP request to the server, on the other hand, I have different types of structure to wrap the response. And this is the struct which I want to cast the interface. type ResHealth struct { Type string Get_health struct { Healthy bool }} My

问题 I am trying to dynamically store the contents of a pointer into a struct. I defined the struct as follows: struct msg3 { uint16_t msgSize; // 2 bytes uint16_t msgType; // 2 bytes uint32_t symbolIndex; // 4 bytes }; I then proceed to initialize a struct of type msg3 using code below. (Packet is of type const u_char*). const msg3* msg3_ = reinterpret_cast<const msg3*>(packet); The above works fine, and sizeof(msg3) accurately returns 8. Following the first 8 bytes in packet, there is 11 bytes

问题 I am trying to dynamically store the contents of a pointer into a struct. I defined the struct as follows: struct msg3 { uint16_t msgSize; // 2 bytes uint16_t msgType; // 2 bytes uint32_t symbolIndex; // 4 bytes }; I then proceed to initialize a struct of type msg3 using code below. (Packet is of type const u_char*). const msg3* msg3_ = reinterpret_cast<const msg3*>(packet); The above works fine, and sizeof(msg3) accurately returns 8. Following the first 8 bytes in packet, there is 11 bytes

问题 I am trying to dynamically store the contents of a pointer into a struct. I defined the struct as follows: struct msg3 { uint16_t msgSize; // 2 bytes uint16_t msgType; // 2 bytes uint32_t symbolIndex; // 4 bytes }; I then proceed to initialize a struct of type msg3 using code below. (Packet is of type const u_char*). const msg3* msg3_ = reinterpret_cast<const msg3*>(packet); The above works fine, and sizeof(msg3) accurately returns 8. Following the first 8 bytes in packet, there is 11 bytes

问题 Is there a data type in Python similar to structs in C++? I like the struct feature myStruct.someName . I know that classes have this, but I don't want to write a class everytime I need a "container" for some data. 回答1: Why not? Classes are fine for that. If you want to save some memory, you might also want to use __slots__ so the objects don't have a __dict__ . See http://docs.python.org/reference/datamodel.html#slots for details and Usage of __slots__? for some useful information. For

问题 Is there a data type in Python similar to structs in C++? I like the struct feature myStruct.someName . I know that classes have this, but I don't want to write a class everytime I need a "container" for some data. 回答1: Why not? Classes are fine for that. If you want to save some memory, you might also want to use __slots__ so the objects don't have a __dict__ . See http://docs.python.org/reference/datamodel.html#slots for details and Usage of __slots__? for some useful information. For