Initialize empty vector in structure - c++

Question

I have a struct:

typedef struct user {     string username;     vector<unsigned char> userpassword; } user_t; 

I need to initialize userpassword with an empty vector:

struct user r={"",?}; 

What should I put instead of ??

Answer 1

Both std::string and std::vector<T> have constructors initializing the object to be empty. You could use std::vector<unsigned char>() but I'd remove the initializer.

Answer 2

Like this:

#include <string> #include <vector>  struct user {     std::string username;     std::vector<unsigned char> userpassword; };  int main() {     user r;   // r.username is "" and r.userpassword is empty     // ... }