Iterating over same type struct members in C

Question

Is it possible to iterate of a C struct, where all members are of same type, using a pointer. Here\'s some sample code that does not compile:

#include 

        

Answer 1

You can also use an unnamed union/struct:

struct foo {
    union {
        struct {
            int mem1;
            int mem2;
            int mem3;
            int mem4;
        };
        int elements[4];
    };
};

foo thefoo;
for (int i = 0; i < 4; ++i) {
    thefoo.elements[i] = i;
}

This might not work on some compilers, int this case you'll have to explicitily name the union and struct inside foo,