Challenge 1: A Point Struct via typedef struct — Possible Solution
====================================================================

#include <stdio.h>

typedef struct {
    int x;
    int y;
} Point;

int main() {
    Point p = {5, 10};
    printf("x=%d y=%d\n", p.x, p.y);
    return 0;
}

Output:

    x=5 y=10

WHY THIS WORKS AS AN ANSWER
------------------------------
The typedef struct { ... } Point; form defines an anonymous struct and
immediately gives it the alias Point in one statement -- exactly the
idiomatic pattern the chapter names as the default in real C code --
so declaring p as Point p = {5, 10} needs no "struct" keyword, and
member access uses the same dot syntax (p.x, p.y) as a plain struct.