Assign values to structure variables

Question

A structure type is defined as:

typedef struct student{
    int id;
    char* name;
    double score;
} Student;

I construct a variable of type

Answer 1

Beware, struct and pointer to struct are 2 different things.

C offers you:

• struct initialization (only at declaration time):

  struct Student s1 = {1, "foo", 2.0 }, s2;
  

• struct copy:

  struct Student s1 = {1, "foo", 2.0 }, s2;
  s2 = s1;
  

• direct element access:

  struct Student s1 ;
  s1.id = 3;
  s1.name = "bar";
  s1.score = 3.0;
  

• manipulation through pointer:

  struct Student s1 = {1, "foo", 2.0 }, s2, *ps3;
  ps3 = &s2;
  ps3->id = 3;
  ps3->name = "bar";
  ps3->score = 3.0;
  

• initialization function:

  void initStudent(struct Student *st, int id, char *name, double score) {
      st->id = id;
      st->name = name;
      st->score = score;
  }
  ...
  int main() {
      ...
      struct Student s1;
      iniStudent(&s1, 1, "foo", 2.0);
      ...
  }
  

Pick among those (or other respecting C standard), but s1 = {id, name, score}; is nothing but a syntax error ;-)