C PROGRAMMING

Can someone help me compile my code? the goal is the get information from two text files called: rental.txt (which is filled as information for the rental function is p input) the other is cars.txt which has the createInventory information. Any help/advice would be appreciated :)

#include

#include

typedef struct {

int carId; // a unique ID of a car

char make[20]; // make of the car

char model[20]; // model of the car

int numDoors; // 2 or 4 door cars

double rate; // the rental rate of the car

} Car;

typedef struct {

char renterName[20]; // name of renter

int daysRenting; // days renting the car

int carId; // ID of the car rented

} Rental;

int createInventory(Car *allCars);

int addNewCar(Car *allCars, int totalCars, int size);

int addNewRental(Car *allCars, int totalCars, Rental *allRentals, int totalRentals, int size);

int findCarIDByMake(Car *allCars, int totalCars, char *carMake);

int findReservation(Rental *allRentals, int totalRentals, char *renterName);

int findCarById(Car *allCars, int totalCars, int carId);

void printAllRentals(Rental *allRentals, int totalRentals, Car *allCars, int totalCars);

void printCarInfo(Car *allCars, int totalCars, int carId);

double getAverageRentalDays(Rental *allRentals, int totalRentals);

// additional stuff

void writeRentals(char *filename, Rental *allRentals, int totalRentals);

int readRentals(char *filename, Rental *allRentals);

void writeCars(char *filename, Car *allCars, int totalCars);

int readCars(char *filename, Car *allCars);

/**

* main function, entry point of the program

*/

int main(int argc, char *argv[]) {

Car allCars[20]; // a list of cars

Rental allRentals[60]; // a list of rentals

int totalCars = 0; // number of all cars owned

int totalRentals = 0; // number of rental

int i = 0;

int menu_choice, renterIndex, carId;

char renterName[20], carMake[20];

totalCars = readCars(argv[1], allCars, totalCars);

totalRentals = readRentals(argv[2],allRentals, totalRentals);

while (1) {

printf("Please enter one of the menu choice: ");

printf("1. Add new car to the inventory. ");

printf("2. Make a reservation. ");

printf("3. Find a reservation using a renter name and print it to the screen. ");

printf("4. Print all rental information to the screen. ");

printf("5. Print car information to the screen of a selected car using the make of the car to search the inventory. ");

printf("6. Calculate and print average number of days rented. ");

printf("7. Exit program. ");

printf("Please input your choice:");

scanf("%d", &menu_choice);

switch (menu_choice) {

case 1:

totalCars = addNewCar(allCars, totalCars, 20);

break;

case 2:

totalRentals = addNewRental(allCars, totalCars, allRentals, totalRentals, 60);

break;

case 3:

printf("Please input the renter's name: ");

scanf("%s", renterName);

renterIndex = findReservation(allRentals, totalRentals, renterName);

printf("Renter name: %s ", renterName);

printf("Days renting: %d ", allRentals[renterIndex].daysRenting);

printCarInfo(allCars, totalCars, allRentals[renterIndex].carId);

break;

case 4:

printAllRentals(allRentals, totalRentals, allCars, totalCars);

break;

case 5:

printf("Please input the car make: ");

scanf("%s", carMake);

carId = findCarIDByMake(allCars, totalCars, carMake);

printCarInfo(allCars, totalCars, carId);

break;

case 6:

printf("The average number of days rented is: %.2lf ", getAverageRentalDays(allRentals, totalRentals));

break;

case 7:

printf("Thank you for using! Bye-bye! ");

totalCars = writeCars(argv[1], allCars, totalCars);

totalRentals = writeRentals(argv[2],allRentals, totalRentals);

return 0;

default:

printf("Invalid input! ");

}

printf(" ");

}

return 0;

}

void writeRentals(char *rental, Rental *allRentals, int totalRentals)

{

FILE *fp2 = fopen("rentals.txt", "w");

for(int i = 0; i < totalRentals; i++) {

fprintf(fp2, "%s %d %d ", allRentals[i].renterName, allRentals[i].daysRenting, allRentals[i].carId);

}

int readRentals(char *rental, Rental *allRentals){

int i = 0;

FILE *fp1 = fopen("rental.txt", "r");

if(fp1 ==NULL) {

printf("File doesn't exist");

}

while(!feof(fp1)){

fscanf(fp1, "%s %d %d", allRentals[i].renterName, &allRentals[i].daysRenting, &allRentals[i].carId);

i++;

}

return i;

}

void writeCars(char *car, Car *allCars, int totalCars){

FILE *fp2 = fopen("car.txt", "w");

if(fp2== NULL){

printf("File doesn't exist");

}

for(int i = 0; i < totalCars; i++)

fprintf(fp2, "%d %s %s %d %.2lf ", allCars[i].carId, allCars[i].make, allCars[i].model, allCars[i].numDoors, allCars[i].rate);

}

int readCars(char *car, Car *allCars){

int i = 0;

FILE *fp1 = fopen("car.txt", "r");

if(fp1== NULL) {

printf("File doesn't exist!");

}

else{

while(!feof(fp1)) {

fscanf(fp1, "%d %s %s %d %lf", &allCars[i].carId, allCars[i].make, allCars[i].model, &allCars[i].numDoors, &allCars[i].rate);

i++;

}

return i;

}

}

/**

* Creates the initial inventory

*/

int createInventory(Car *allCars) {

allCars[0].carId = 1234;

strcpy(allCars[0].make, "VW");

strcpy(allCars[0].model, "Golf");

allCars[0].numDoors = 2;

allCars[0].rate = 66.0;

allCars[1].carId = 2241;

strcpy(allCars[1].make, "Ford");

strcpy(allCars[1].model, "Focus");

allCars[1].numDoors = 4;

allCars[1].rate = 45.0;

allCars[2].carId = 3445;

strcpy(allCars[2].make, "BMW");

strcpy(allCars[2].model, "X3");

allCars[2].numDoors = 4;

allCars[2].rate = 128.0;

return 3;

}

/**

* Adds a new car to the list

*/

int addNewCar(Car *allCars, int totalCars, int size) {

if (totalCars == size) {

printf("Inventory full, add new car failed! ");

return totalCars;

}

printf("Please input the car ID: ");

scanf("%d", &allCars[totalCars].carId);

printf("Please input car make: ");

scanf("%s", allCars[totalCars].make);

printf("Please input car model: ");

scanf("%s", allCars[totalCars].model);

printf("Please input the number of doors: ");

scanf("%d", &allCars[totalCars].numDoors);

printf("Please input the rate: ");

scanf("%lf", &allCars[totalCars].rate);

totalCars++;

return totalCars;

}

/**

* Adds a new rental

*/

int addNewRental(Car *allCars, int totalCars, Rental *allRentals, int totalRentals, int size) {

char carMake[20];

int carId;

if (totalRentals == size) {

printf("Cannot add more rental information! ");

return totalRentals;

}

printf("Please input the renter's name: ");

scanf("%s", allRentals[totalRentals].renterName);

printf("Please input the days to rent: ");

scanf("%d", &allRentals[totalRentals].daysRenting);

do {

printf("Please input the car make: ");

scanf("%s", carMake);

} while ((carId = findCarIDByMake(allCars, totalCars, carMake)) == -1);

allRentals[totalRentals].carId = carId; // assume user input correct car make

totalRentals++;

return totalRentals;

}

/**

* Find a car ID by the maker of car

*/

int findCarIDByMake(Car *allCars, int totalCars, char *carMake) {

int i;

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

if (!strcmp(allCars[i].make, carMake)) return allCars[i].carId;

return -1;

}

/**

* Find a reservation by renter's name

*/

int findReservation(Rental *allRentals, int totalRentals, char *renterName) {

int i;

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

if (!strcmp(allRentals[i].renterName, renterName)) return i;

return -1;

}

/**

* Find a car by car ID

*/

int findCarById(Car *allCars, int totalCars, int carId) {

int i;

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

if (allCars[i].carId == carId) return i;

return -1;

}

/**

* Print the details of all rentals

*/

void printAllRentals(Rental *allRentals, int totalRentals, Car *allCars, int totalCars) {

int i;

for (i = 0; i < totalRentals; i++) {

printf("Rental #%d ", i);

printf("Renter's name: %s ", allRentals[i].renterName);

printf("Days renting: %d ", allRentals[i].daysRenting);

printCarInfo(allCars, totalCars, allRentals[i].carId);

printf(" ");

}

}

/**

* Print the information of a car

*/

void printCarInfo(Car *allCars, int totalCars, int carId) {

int carIndex = findCarById(allCars, totalCars, carId);

printf("Car make: %s ", allCars[carIndex].make);

printf("Car model: %s ", allCars[carIndex].model);

printf("Number of doors: %d ", allCars[carIndex].numDoors);

printf("Renting rate: %.2lf ", allCars[carIndex].rate);

}

/**

* Calculate the average rental days

*/

double getAverageRentalDays(Rental *allRentals, int totalRentals) {

int i, sum = 0;

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

sum += allRentals[i].daysRenting;

return (double) sum / totalRentals;

}