trying some c

main.c

#include "register.h"

int main() {
}

Makefile

run_test: test
	./test

run: main
	./main
test: test.c person.c person.h
	gcc -o test test.c person.c

build: main.c person.c person.h
	gcc -o main test.c person.c

person.c

#include "person.h"

void write_person_to_bin_file(struct Person * person, FILE * file) {
    fwrite(person, sizeof(struct Person), 1, file);

}
void read_person_to_bin_file(struct Person * person, FILE * file) {
    fread(person, sizeof(struct Person), 1, file);
}

person.h

#include <stdio.h>
struct Person {
    char name[100];
    char email[100];
    char phone[100];
};

typedef struct Person Person;

void write_person_to_bin_file(Person *person, FILE * file);
void read_person_to_bin_file(Person *person, FILE * file);

READ ME

THIS IS ME ONLY TRYING SOME C

test.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "person.h"
#include "assert.h"


void test_Person_members(){
    struct Person someone = {
        "name",
        "email",
        "phone"
    };
    assert(strcmp(someone.name, "name") == 0);
    assert(strcmp(someone.email, "email") == 0);
    assert(strcmp(someone.phone, "phone") == 0);
}

void test_Person_write_to_file_and_read_back_in() {
    struct Person to_be_writen = {
        "name",
        "email",
        "phone"
    };
    struct Person to_be_read;

    FILE * test_file;
    test_file = fopen("test.bin", "wb");
    write_person_to_bin_file(&to_be_writen, test_file);
    fclose(test_file);
    
    test_file = fopen("test.bin", "rb");
    read_person_to_bin_file(&to_be_read, test_file);
    fclose(test_file);

    assert(strcmp(to_be_writen.name, to_be_read.name) == 0);
    assert(strcmp(to_be_writen.email, to_be_read.email) == 0);
    assert(strcmp(to_be_writen.phone, to_be_read.phone) == 0);

}

int main() { 
    test_Person_members();
    test_Person_write_to_file_and_read_back_in();
    puts("All tests Passes!");
    return 0;
}

test_struct.c

#include<stdio.h>
#include<string.h>
#include<stdlib.h>

struct Person{
    char namn[120];
    char email[120];
    char telefon[120];
};

void print_person(struct Person *person){
    printf("Namn:    %s\n", person->namn);
    printf("Email:   %s\n", person->email);
    printf("Telefon: %s\n", person->telefon);
    printf("\n");
}

void print_persons(struct Person persons[], int length){
    int i = 0;
    while(i < length) {
        print_person(&persons[i]);
        i += 1;
    }
}

int main () {
    struct Person persons[4] = {
        {
            "My Name",
            "my@email.com",
            "09035768"
        },
        {
            "Your Name",
            "your@email.com",
            "09035761"
        },
        {
            "Someones Name",
            "Someones@email.com",
            "09035762"
        }
    };
    print_persons(persons, 4);
}