#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <assert.h>

// Define and use a struct type using cannonical syntax aka "Basic syntax" for struct type definitions.

// Define a new type called 'struct Point'
struct Point {
    int x;
    int y;
};  // IMPORTANT:  Remember the semicolon at the end of a struct type definition.

// Type definition does not create a variable.
// "    "          does not allocate space.
// It only tells the compiler that if you use that type name in the future, what it is supposed to 
// mean.

void print_point(struct Point p) {
    printf("(p.x, p.y) == (%d, %d)\n", p.x, p.y);
}

int main(int argc, char* argv[]) {
    
    // Declare an object called 'p' of type 'struct Point' and intialize its two fields:
    // .x to 5, and .y to 7.
    struct Point p = { .x = 5, .y = 7 };
                  // └────────┬───────┘
                  //   NAMED INITIALIZER
    // We can only use a named initializer with the declaration of that variable.

    print_point(p);

    // TERMINOLOGY
    // 'p' is an object of type 'struct Point'.
    // 'x' (or '.x') and 'y' (or '.y') are fields of the type 'struct Point'.

    return EXIT_SUCCESS;
}
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