Cycling through the fields in a structure

Is it possible to increment through the fields of a structure using an index value.

If I had a structure like:

Code:

---

typedef struct {
  int field1;
  int field2;
  int field3;
} mystruct;

---

And say I wanted to populate the fields of the structure within a loop like:

Code:

---

mystruct aStruct;

for ( index = 0 ; index == 3; index++)
{
      aStruct.index = 10;
}

---

Where index will refer to the field number in the structure?

Try an array:

Code:

---

typedef struct {
  int field[3];
} mystruct;

mystruct aStruct;

for ( index = 0 ; index < 3; index++)
{
      aStruct.field[index] = 10;
}

---

Cant do, there will be string fields in the stucture as well. Which I think answers my question in a slightly different way. Because unless I program in the loop which fields are strings and which are integers, it will not know whether to do a strcpy or an integer assignment, in which case it will probably be better handling each field of the structure sequentially and just having a very long function.

Unless you make each member of your struct into a union containing strings and integers, and something to discriminate which one you have at any moment, then it's lots of code to treat each member of the struct separately.