#include<stdio.h>
#include<string.h>
#include<unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

struct cat_struct {
	char name[16];
	int age;
	int catches_per_month;
};

void print_cat(struct cat_struct *toprint){
	printf("Name:  %s\nAge:  %d\nCatchesPerMonth:  %d\n", toprint->name, toprint->age, toprint->catches_per_month);
}

void main(){
	char message[] = "There is a semiconductor in my cupcake";
	printf("The data is:  %s\n", message);
	printf("The data is:  %lx\n", message);
	printf("message is %d bytes\n", sizeof message );

	char *message_ref = message;
	printf("The data is:  %s\n", message_ref);
	printf("The data is:  %lx\n", message_ref);
	printf("message is %d bytes\n", sizeof message_ref);

	if(message == message_ref){
		printf("They are equal\n");
	}
	if(0 == strcmp(message, message_ref)){
		printf("They have the same contents\n");
	}

	int *iMessage = (int*)message;
	struct cat_struct *c = (struct cat_struct*)message;
	print_cat(c);
	c->age = 1400;
	print_cat(c);
	
	for(int i = 0; i < 10; i++){
		printf("iMessage[%d] = %d\n", i, iMessage[i]);
	}

	int fd = open("catfile", O_WRONLY| O_CREAT);
	if(fd == -1){
		perror("There was a problem with the file");
		return;
	}
	write(fd, c, sizeof(struct cat_struct));
	close(fd);
}