// An example program making use of structs.

#include <stdio.h>

struct student {
    int zid;
    char first[20];
    char last[20];
    int program;
    char alias[10];
};

struct student abiram = {
    .zid = 5308310,
    .first = "Abiram",
    .last = "Nadarajah",
    .program = 3778,
    .alias = "abiramn"
};

struct student xavier = {
    .zid = 5417087,
    .first = "Xavier",
    .last = "Cooney",
    .program = 3778,
    .alias = "xavc"
};

int main(void) {
    struct student *selection = &abiram;

    printf("zID: z%d\n", selection->zid);
    printf("First name: %s\n", selection->first);
    printf("Last name: %s\n", selection->last);
    printf("Program: %d\n", selection->program);
    printf("Alias: %s\n", selection->alias);

    // What's the size of each field of this struct,
    // as well as the overall struct?

    printf("sizeof(zid) = %zu\n", sizeof(selection->zid));
    printf("sizeof(first) = %zu\n", sizeof(selection->first));
    printf("sizeof(last) = %zu\n", sizeof(selection->last));
    printf("sizeof(program) = %zu\n", sizeof(selection->program));
    printf("sizeof(alias) = %zu\n", sizeof(selection->alias));

    // What's the size of the overall struct?
    printf("sizeof(struct student) = %zu\n", sizeof(struct student));

    // We can see that two extra padding bytes were added to the end
    // of the struct, to ensure that the next struct in memory is aligned
    // to a word boundary.

    return 0;

}