1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 | #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;
}
/* vim: set tabstop=4 shiftwidth=4 fileencoding=utf-8 noexpandtab: */
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