need step by step explanation in the code

#include //innehller in- och utmatnigsfunktioner scanf, printf, fgetc, fopen, fread

#include //innehller generella hjlpmedel malloc, size_t, atoi

#include // deklarerar en uppsttning funktioner fr att klassificera (och transformera) enskilda tecken.

#include //innehller texthantering strlen, strcmp, strtok

#define STR_LANGD 30

#define VEHICLE 10

#define NUMBEROF_PEOPLE 10

typedef struct

{

char name[STR_LANGD];

int age;

}

Person;

typedef struct

{

Person person;

char model[STR_LANGD];

char carbrand[STR_LANGD];

char registrationnumber[STR_LANGD];

}

Vehicle;

void initVehicle(Vehicle myVehicle[])

{

int i;

for (i = 0; i < VEHICLE; i++)

{

myVehicle[i].person.age = 0;

}

}

int menu() {

int choice = 0;

printf ("1. Add a vehicle. ");

printf ("2. Remove a vehicle ");

printf ("3. Sort by car brand. ");

printf ("4. Print vehicle information. ");

printf ("5. Print the entire vehicle register. ");

printf ("0. Exit. ");

scanf("%d", &choice);

return choice;

}

void AddVehicle(Vehicle myVehicle[])

{

Vehicle temp;

int i;

fflush(stdin);

printf("Enter name: ");

scanf("%s", temp.person.name);

printf("Enter personens lder: ");

scanf("%d", &temp.person.age);

printf("Enter Vehiclestyp: ");

scanf("%s", temp.model);

printf("Enter car brand: ");

scanf("%s", temp.carbrand);

printf("Enter registration number: ");

scanf("%s", temp.registrationnumber);

for (i = 0; i < VEHICLE; i++)

{

if (myVehicle[i].person.age == 0)

{

myVehicle[i] = temp;

break;

}

}

}

void showVehicle(Vehicle myVehicle[])

{

int i;

printf(" All vehicle in database ");

printf("------------------- ");

for (i = 0; i < VEHICLE; i++)

{

if (myVehicle[i].person.age != 0)

{

printf("Place: %d ", i);

printf("Name: ");

puts(myVehicle[i].person.name);

printf("lder p garen: %d ", myVehicle[i].person.age);

printf("Car model: %s ", myVehicle[i].model);

printf("Car brand: %s ", myVehicle[i].carbrand);

printf("Registration number: %s ", myVehicle[i].registrationnumber);

}

}

}

void DeleteVehicle(Vehicle myVehicle[VEHICLE])

{

int temp;

printf("P vilken plats (0-10) vill du ta bort Vehicleinfo? Plats: ");

scanf("%d", &temp);

if (myVehicle[temp].person.age != 0)

{

myVehicle[temp].person.age = 0;

}

}

void printinfo(Vehicle myVehicle[VEHICLE])

{

int temp;

printf("P vilken plats (0-10) vill du se Vehicleinfo? Plats: ");

scanf("%d", &temp);

if (myVehicle[temp].person.age != 0)

{

printf(" ------------Vehicleinfo----------- ");

printf("Place: %d", temp);

printf("name: %s ", myVehicle[temp].person.name);

printf("Age on owner: %d ", myVehicle[temp].person.age);

printf("Car model: %s ", myVehicle[temp].model);

printf("Car brand: %s ", myVehicle[temp].carbrand);

printf("Registration number: %s ", myVehicle[temp].registrationnumber);

}

}

void carSort(Vehicle myVehicle[VEHICLE])

{

int i;

int j;

Vehicle temp;

for (i = 1; i < VEHICLE; i++)

{

for (j = 0; j < VEHICLE - i; j++)

{

if (myVehicle[j].carbrand[0] > myVehicle[j+1].carbrand[0])

{

temp = myVehicle[j];

myVehicle[j] = myVehicle[j+1];

myVehicle[j+1] = temp;

}

}

}

}

int main() //main: hr startar alla C-program

{

Vehicle myVehicle[VEHICLE];

int menuchoice = 0;

initVehicle(myVehicle);

do

{

menuchoice = menu();

switch (menuchoice)

{

case 1: AddVehicle(myVehicle); break;

case 2: DeleteVehicle(myVehicle); break;

case 3: carSort(myVehicle); break;

case 4: printinfo(myVehicle); break;

case 5: showVehicle(myVehicle); break;

default: break;

}

}

while (menuchoice !=0);

return 0;

}