Food Ordering System in C

15 Jun, 2022
Prerequisite: Modular Approach in Programming Problem Statement: Write C program to implement Food ordering with the following functionalities:
Login & Signup
Search by Food
Search by hotels
Cart & Order Confirmation
Approach and Functionality:
This is the main function for signup, From here we are calling the account_check() function to validate the inputs. Following are the functionalities:
Input the username, age, email, password, confirm the password, and mobile number.
Validate the inputsUsername must contain alphabets.Age must be greater than and not equal to 0.Email must contain @, a comma and length should be greater than 5.Passwords must contain length between 8 to 12 with at least one uppercase, lowercase, number and special character. Both password and confirm password should be the same.Mobile number should contain numbers and exactly 10 digits.
Username must contain alphabets.
Age must be greater than and not equal to 0.
Email must contain @, a comma and length should be greater than 5.
Passwords must contain length between 8 to 12 with at least one uppercase, lowercase, number and special character. Both password and confirm password should be the same.
Mobile number should contain numbers and exactly 10 digits.
After the successful validation of all input fields, it checks whether the same account already exists or not through account_check() functionality.
This function implements the login features of our project. While login, the Email, and Password are validated and checked whether it is already signed up. After the successful login, there is an option to choose either Search_by_food() or Search_by_hotels() functionalities.
In this functionality, the food order is placed after selecting any Hotel. Once the hotel is selected the list of food is displayed with their respective costs. Once the food is selected, you need to go to option Select Cart for the successful ordering of the foods.
Before ordering by the hotel, initialize some default hotels which we are given locally through structures in C for our demonstration. Once the hotels and their respective foods are initialized dynamically, it will display the list of hotels.
Once the hotel is selected in the above step, select the food and enter the number of items to order. Once the selection of all the foods is done it will display the total amount of food selected. Move to Select Cart for the successful ordering of the foods.
This functionality perform the following:
Display the total cost of your orders.
Confirm your order and enjoy your food.
Initialization
Boilerplate
Signup
Validate
Login
Hotel Initialization
Search by Hotels
Search by Food
Cart
Complete Code
// C program to initialize the Food// Ordering System// Initialization#include <stdio.h> // Structure to store the user details// i.e., Signup detailsstruct details {    char uname[100];    int age;    char password[100];    char email[100];    char mobile[10];}; // Structure to store the hotels// and their food detailsstruct hotels {    char hotel[100];    char first_food[20];    char second_food[20];    char third_food[20];    char fourth_food[25];    int first, second, third, fourth;}; // Initialize the hotels and detailsstruct hotels m[5];struct details s[100]; // Function to get the input for// a new accountvoid signup(); // Function to check whether account// is already existed or notvoid account_check(); // Function to validate all input fieldsint validate();void login();void cart();void search_by_hotels();void search_by_food();void food_order(int food); // Function to initialize the hotels and// food structure dynamicallyvoid hotel_initialize();void hotels(int hotel_choice); int flag = 1, i, j = 0, count = 0, caps = 0;int small = 0, special = 0, numbers = 0;int success = 0, x, choice;char temp_name[100], temp_password1[100];char temp_password2[100], temp_email[100];char temp_mobile[100]; int temp_age, total = 0, food_choice, n;int hotel_choice, search_choice, confirm;int ch, food, hotel_id;
// C program to implement Boilerplate// Code for the Food Ordering Systemint main(){    while (1) {        printf("\n\nWelcome to Food ");         printf("Ordering System"               "\n\n1)SIGNUP\n");        printf("2)LOGIN\n3)EXIT\n\n");        printf("Enter your choice\t");        scanf("%d", &choice);         // Switch Cases        switch (choice) {         // For Signup Function        case 1: {            signup();            break;        }         // For Login Function        case 2: {            login();            break;        }        case 3: {            exit(1);        }        default: {                printf("\nPlease Enter the "                printf("valid choice\n");                break;        }        }    }}
// Function to create a new user for// the Food ordering systemvoid signup(){    printf("Enter Your name\t");    scanf("%s", temp_name);     printf("Enter Your Age\t");    scanf("%d", &temp_age);     printf("Enter Your Email\t");    scanf("%s", temp_email);     printf("Enter Password\t");    scanf("%s", temp_password1);     printf("Confirm Password\t");    scanf("%s", temp_password2);     printf("Enter Your Mobile Number\t");    scanf("%s", temp_mobile);     // Function Call to validate    // the user creation    x = validate();    if (x == 1)        account_check();}
// Function to validate the user for// the signup processint validate(){    // Validate the name    for (i = 0; temp_name[i] != '\0'; i++) {        if (!((temp_name[i] >= 'a' && temp_name[i] <= 'z')              || (temp_name[i] >= 'A'                  && temp_name[i] <= 'Z'))) {            printf("\nPlease Enter the"            printf("valid Name\n");            flag = 0;            break;        }    }    if (flag == 1) {        count = 0;         // Validate the Email ID        for (i = 0;             temp_email[i] != '\0'; i++) {            if (temp_email[i] == '@'                || temp_email[i] == '.')                count++;        }        if (count >= 2            && strlen(temp_email) >= 5) {            // Validating the password            // check if it matches with            // correct password or not            if (!strcmp(temp_password1,                        temp_password2)) {                if (strlen(temp_password1) >= 8                    && strlen(temp_password1) <= 12) {                    caps = 0;                    small = 0;                    numbers = 0;                    special = 0;                    for (i = 0;                         temp_password1[i]                         != '\0';                         i++) {                        if (temp_password1[i] >= 'A'                            && temp_password1[i] <= 'Z')                            caps++;                        else if (temp_password1[i] >= 'a'                                 && temp_password1[i]                                        <= 'z')                            small++;                        else if (temp_password1[i] >= '0'                                 && temp_password1[i]                                        <= '9')                            numbers++;                        else if (temp_password1[i] == '@'                                 || temp_password1[i] == '&'                                 || temp_password1[i] == '#'                                 || temp_password1[i]                                        == '*')                            special++;                    }                    if (caps >= 1 && small >= 1                        && numbers >= 1 && special >= 1) {                        // Validating the Input age                        if (temp_age != 0 && temp_age > 0) {                            // Validating the Input mobile                            // number                            if (strlen(temp_mobile) == 10) {                                for (i = 0; i < 10; i++) {                                    if (temp_mobile[i]                                            >= '0'                                        && temp_mobile[i]                                               <= '9') {                                        success = 1;                                    }                                    else {                                        printf("\n\nPlease");                                        printf("Enter Valid ");                                        printf("Mobile "                                               "Number\n\n");                                        return 0;                                        break;                                    }                                }                                 // Success is assigned with                                // value 1, Once every                                // inputs are correct.                                if (success == 1)                                    return 1;                            }                            else {                                printf("\n\nPlease Enter the");                                printf("10 digit mobile");                                printf("number\n\n");                                return 0;                            }                        }                        else {                            printf("\n\nPlease Enter ");                            printf("the valid age\n\n");                            return 0;                        }                    }                    else {                        printf("\n\nPlease Enter the");                        printf("strong password, Your ");                        printf("password must contain ");                        printf("atleast one uppercase, ");                        printf("Lowercase, Number and ");                        printf("special character\n\n");                        return 0;                    }                }                else {                    printf("\nYour Password is very");                    printf("short\nLength must ");                    printf("between 8 to 12\n\n");                    return 0;                }            }            else {                printf("\nPassword "                       "Mismatch\n\n");                return 0;            }        }        else {            printf("\nPlease Enter Valid E-Mail\n\n");            return 0;        }    }}
// Function to Login the usersvoid login(){    printf("\n\nLOGIN\n\n");    printf("\nEnter Your Email\t");    scanf("%s", temp_email);     printf("Enter Your Password\t");    scanf("%s", temp_password1);     for (i = 0; i < 100; i++) {        // Check whether the input email        // is already existed or not        if (!strcmp(s[i].email, temp_email)) {            // Check whether the password            // is matched with email or not            if (!strcmp(s[i].password, temp_password1)) {                printf("\n\nWelcome %s, ");                printf("Your are successfully ");                printf("logged in\n\nWe Provide ");                printf("two ways of search\n1) ");                printf("Search By Hotels\n2) ");                printf("Search by Food\n3) ");                printf("Exit\n\nPlease Enter");                printf("your choice\t", s[i].uname);                scanf("%d", &search_choice);                 // Get the input whether                // the user are going to search                // /Order by hotels or search/                // order by food                switch (search_choice) {                case 1: {                    search_by_hotels();                    break;                }                case 2: {                    search_by_food();                    break;                }                case 3: {                    exit(1);                }                default: {                    printf("Please Enter ");                    printf("the valid choice\n\n");                    break;                }                }                break;            }            else {                printf("\n\nInvalid Password! ");                printf("Please Enter the ");                printf("correct password\n\n");                main();                break;            }        }        else {            printf("\n\nAccount doesn't ");            printf("exist, Please signup!!\n\n");            main();            break;        }    }}
// Function that initializes the// Hotelsvoid hotel_initialize(){    // Initialize the structure with    // Aarya_bhavan hotel and some    // foods name with their cost    strcpy(m[1].hotel, "Aarya_Bhavan");    strcpy(m[1].first_food, "Sandwich");    strcpy(m[1].second_food, "Pizza");    strcpy(m[1].third_food, "Fried_Rice");    m[1].first = 70;    m[1].second = 100;    m[1].third = 95;     // Initialize the structure with    // Banu_Hotel and some foods name    // and their respective costs    strcpy(m[2].hotel, "Banu_Hotel");    strcpy(m[2].first_food, "Parotta");    strcpy(m[2].second_food, "Noodles");    strcpy(m[2].third_food, "Chicken_Rice");    m[2].first = 15;    m[2].second = 75;    m[2].third = 80;     // Initialize the structure with    // SR_Bhavan hotel and some foods    // name and their respective costs    strcpy(m[3].hotel, "SR_Bhavan");    strcpy(m[3].first_food, "Chicken_Biriyani");    strcpy(m[3].second_food, "Prawn");    strcpy(m[3].third_food, "Faloda");    m[3].first = 90;    m[3].second = 120;    m[3].third = 35;}
// Function that implements the// functionality search by hotelsvoid search_by_hotels(){    hotel_initialize();    printf("\n\nPlease Choose the");    printf("hotels\n\n1) %s\n2) %s\n3) %s",           m[1].hotel,           m[2].hotel, m[3].hotel);    printf("\n4) Exit\n\nPlease ");    printf("select the hotel\t");     scanf("%d", &hotel_choice);     if (hotel_choice > 4) {        printf("Please Enter the");        printf("valid choice\n\n");        search_by_hotels();    }    else if (hotel_choice == 4)        exit(1);    else        hotels(hotel_choice);} void hotels(int hotel_choice){    total = 0;    while (1) {        // Displays the list of foods        // available in selected hotel        printf("\n\nList of foods available");        printf("in %s\n\n1) %s\tRs: %d\n2)",               m[hotel_choice].hotel,               m[hotel_choice].first_food,               m[hotel_choice].first);         printf("%s\tRs: %d\n3) %s\tRs: %d\n4)",               m[hotel_choice].second_food,               m[hotel_choice].second,               m[hotel_choice].third_food,               m[hotel_choice].third);         printf("Cart\n5) Exit\n\nPlease Enter");        printf("Your Choice\t");        scanf("%d", &food_choice);         // Get the input for no. of foods        // to calculate the total amount        if (food_choice == 1) {            printf("Please Enter the ");            printf("Count of %s\t",                   m[hotel_choice].first_food);            scanf("%d", &n);             total = total                    + (n * m[hotel_choice].first);        }        else if (food_choice == 2) {            printf("Please Enter Count");            printf("of %s\t",                   m[hotel_choice].second_food);            scanf("%d", &n);            total = total                    + (n * m[hotel_choice].second);        }        else if (food_choice == 3) {            printf("Please Enter the Count");            printf("of %s\t",                   m[hotel_choice].third_food);            scanf("%d", &n);            total = total                    + (n * m[hotel_choice].third);        }         // Once the user, completed their        // order, they can go to cart        // by giving choice as 4.        else if (food_choice == 4) {            cart();        }        else if (food_choice == 5) {            search_by_hotels();        }        else {            printf("Please Enter the");            printf("valid Choice\n\n");        }    }}
// Function to implement the// search by foodvoid search_by_food(){    total = 0;     // Initialize all the hotels    // and their foods    hotel_initialize();    while (1) {        printf("\n\nPlease choose the ");        printf("food\n\n1) %s\t%d\n2) %s\t%d",               m[1].first_food, m[1].first,               m[1].second_food, m[1].second);         printf("\n3) %s\t%d\n4) %s\t%d\n",               m[1].third_food, m[1].third,               m[2].first_food, m[2].first);         printf("5) %s\t%d\n6) %s\t%d\n",               m[2].second_food, m[2].second,               m[2].third_food, m[2].third);        printf("7) %s\t%d\n8) %s\t%d\n",               m[3].first_food, m[3].first,               m[3].second_food, m[3].second);        printf("9) %s\t%d\n10) Cart\n",               m[3].third_food,               m[3].third);        printf("11) Exit");         printf("\nPlease Enter Your Choice\t");        scanf("%d", &food);        if (food > 10) {            printf("Please Enter the ");            printf("valid choice\n\n");            search_by_food();        }        // Moves to the cart        // functionality        else if (food == 10)            cart();        else if (food == 11)            exit(1);        // Call food_order functionality        // to get the no of foods and        // to calculate the total        // amount of the order.        else            food_order(food);    }}
// Function to implement the cartvoid cart(){    printf("\n\n\n\n--------------Cart");    printf("----------------");    printf("\nYour Total Order");    printf("Amount is %d\n", total);    printf("\n\nDo You wish to");    printf("order (y=1/n=0):");    scanf("%d", &ch);    if (ch == 1) {        printf("\n\nThank You for your");        printf("order!! Your Food is on ");        printf("the way. Welcome again!!\n\n");        exit(1);    }    else if (ch == 0) {        printf("Do You want to exit -1");        printf("or Go back -0");        scanf("%d", &confirm);        if (confirm == 1) {            printf("\n\nOops! Your order is");            printf("cancelled!! Exiting..");            printf("Thank You visit again!\n");            exit(1);        }        else {            printf("\n\nThank You\n\n");            login();        }    }    else {        printf("\n\nPlease Enter the ");        printf("correct choice\n\n");        cart();    }}
// C program to implement the Food// Ordering System#include <stdio.h>#include <string.h> // Structure to store the// user details (Signup details)struct details {    char uname[100];    int age;    char password[100];    char email[100];    char mobile[10];}; // Structure to store the// hotels and their food detailsstruct hotels {    char hotel[100];    char first_food[20];    char second_food[20];    char third_food[20];    char fourth_food[25];    int first, second, third, fourth;}; struct hotels m[5];struct details s[100]; // Function to get the// input for new account.void signup(); // Function to check whether// the account is already// existed or notvoid account_check(); // Function to validate// all the input fields.int validate();void login();void cart();void search_by_hotels();void search_by_food();void food_order(int food); // Function to initialize the// hotels and food// structure dynamicallyvoid hotel_initialize();void hotels(int hotel_choice);int flag = 1, i, j = 0, count = 0, caps = 0;int small = 0, special = 0, numbers = 0;int success = 0, x, choice;char temp_name[100], temp_password1[100];char temp_password2[100], temp_email[100];char temp_mobile[100];int temp_age, total = 0, food_choice, n;int hotel_choice, search_choice, confirm;int ch, food, hotel_id; // Boilerplate Code for the// Food Ordering Systemint main(){    while (1) {        printf(""               "\n\nWelcome to Food ");        printf("Ordering System\n\n1)SIGNUP\n");        printf("2)LOGIN\n3)EXIT\n\n");        printf("Enter your choice\t");        scanf("%d", &choice);        switch (choice) {        case 1: {            signup();            break;        }        case 2: {            login();            break;        }        case 3: {            // exit(1);            return 0;        }        default: {            printf("\nPlease Enter the ");            printf("valid choice\n");            break;        }        }    }} // Function to create a new// user for the Food ordering// systemvoid signup(){    printf("Enter Your name\t");    scanf("%s", temp_name);     printf("Enter Your Age\t");    scanf("%d", &temp_age);     printf("Enter Your Email\t");    scanf("%s", temp_email);     printf("Enter Password\t");    scanf("%s", temp_password1);     printf("Confirm Password\t");    scanf("%s", temp_password2);     printf("Enter Your Mobile Number\t");    scanf("%s", temp_mobile);     // Function Call to validate    // the user creation    x = validate();    if (x == 1)        account_check();} // Function to validate the user// for signup processint validate(){    // Validate the name    for (i = 0; temp_name[i] != '\0'; i++) {        if (!((temp_name[i] >= 'a' && temp_name[i] <= 'z')              || (temp_name[i] >= 'A'                  && temp_name[i] <= 'Z'))) {            printf("\nPlease Enter the");            printf("valid Name\n");            flag = 0;            break;        }    }    if (flag == 1) {        count = 0;         // Validate the Email ID        for (i = 0;             temp_email[i] != '\0'; i++) {            if (temp_email[i] == '@'                || temp_email[i] == '.')                count++;        }        if (count >= 2            && strlen(temp_email) >= 5) {            // Validating the Password and            // Check whether it matches            // with Conform Password            if (!strcmp(temp_password1,                        temp_password2)) {                if (strlen(temp_password1) >= 8                    && strlen(temp_password1) <= 12) {                    caps = 0;                    small = 0;                    numbers = 0;                    special = 0;                    for (i = 0; temp_password1[i] != '\0';                         i++) {                        if (temp_password1[i] >= 'A'                            && temp_password1[i] <= 'Z')                            caps++;                        else if (temp_password1[i] >= 'a'                                 && temp_password1[i]                                        <= 'z')                            small++;                        else if (temp_password1[i] >= '0'                                 && temp_password1[i]                                        <= '9')                            numbers++;                        else if (temp_password1[i] == '@'                                 || temp_password1[i] == '&'                                 || temp_password1[i] == '#'                                 || temp_password1[i]                                        == '*')                            special++;                    }                    if (caps >= 1 && small >= 1                        && numbers >= 1 && special >= 1) {                        // Validating the Input age                        if (temp_age != 0 && temp_age > 0) {                            // Validating the Input mobile                            // number                            if (strlen(temp_mobile) == 10) {                                for (i = 0; i < 10; i++) {                                    if (temp_mobile[i]                                            >= '0'                                        && temp_mobile[i]                                               <= '9') {                                        success = 1;                                    }                                    else {                                        printf("\n\nPlease");                                        printf("Enter Valid ");                                        printf("Mobile "                                               "Number\n\n");                                        return 0;                                        break;                                    }                                }                                 // Success is assigned with                                // value 1, Once every                                // inputs are correct.                                if (success == 1)                                    return 1;                            }                            else {                                printf("\n\nPlease Enter the");                                printf("10 digit mobile");                                printf("number\n\n");                                return 0;                            }                        }                        else {                            printf("\n\nPlease Enter ");                            printf("the valid age\n\n");                            return 0;                        }                    }                    else {                        printf("\n\nPlease Enter the");                        printf("strong password, Your ");                        printf("password must contain ");                        printf("atleast one uppercase, ");                        printf("Lowercase, Number and ");                        printf("special character\n\n");                        return 0;                    }                }                else {                    printf("\nYour Password is very");                    printf("short\nLength must ");                    printf("between 8 to 12\n\n");                    return 0;                }            }            else {                printf("\nPassword Mismatch\n\n");                return 0;            }        }        else {            printf("\nPlease Enter"                   " Valid E-Mail\n\n");            return 0;        }    }} // Function to check if the account// already exists or notvoid account_check(){    for (i = 0; i < 100; i++) {        // Check whether the email        // and password are already        // matched with existed account        if (!(strcmp(temp_email, s[i].email)              && strcmp(temp_password1,                        s[i].password))) {            printf("\n\nAccount Already");            printf("Existed. Please Login !!\n\n");            main();            break;        }    }    // if account does not already    // existed, it creates a new    // one with new inputs    if (i == 100) {        strcpy(s[j].uname, temp_name);        s[j].age = temp_age;        strcpy(s[j].password, temp_password1);        strcpy(s[j].email, temp_email);        strcpy(s[j].mobile, temp_mobile);        j++;        printf("\n\n\nAccount Successfully");        printf("Created!!\n\n");    }} // Function to Login the usersvoid login(){    printf("\n\nLOGIN\n\n");    printf("\nEnter Your Email\t");    scanf("%s", temp_email);    printf("Enter Your Password\t");    scanf("%s", temp_password1);    for (i = 0; i < 100; i++) {        // Check whether the input        // email is already existed or not        if (!strcmp(s[i].email, temp_email)) {            // Check whether the password            // is matched with the email or not            if (!strcmp(s[i].password, temp_password1)) {                printf("\n\nWelcome %s, ", s[i].uname);                printf("Your are successfully ");                printf("logged in\n\nWe Provide ");                printf("two ways of search\n1) ");                printf("Search By Hotels\n2) ");                printf("Search by Food\n3) ");                printf("Exit\n\nPlease Enter");                printf("your choice\t");                scanf("%d", &search_choice);                 // Getting the input whether                // the user are going to search                // /Order by hotels or search/                // order by food.                switch (search_choice) {                case 1: {                    search_by_hotels();                    break;                }                case 2: {                    search_by_food();                    break;                }                case 3: {                    // exit(1);                    return;                }                default: {                    printf("Please Enter ");                    printf("the valid choice\n\n");                    break;                }                }                break;            }            else {                printf("\n\nInvalid Password! ");                printf("Please Enter the ");                printf("correct password\n\n");                main();                break;            }        }        else {            printf("\n\nAccount doesn't ");            printf("exist, Please signup!!\n\n");            main();            break;        }    }} // Function to implement the Hotel// initializervoid hotel_initialize(){    // Initializing the structure    // with Aarya_bhavan hotel and    // some foods name and    // their respective costs.    strcpy(m[1].hotel, "Aarya_Bhavan");    strcpy(m[1].first_food, "Sandwich");    strcpy(m[1].second_food, "Pizza");    strcpy(m[1].third_food, "Fried_Rice");    m[1].first = 70;    m[1].second = 100;    m[1].third = 95;     // Initializing the structure with    // Banu_Hotel and some foods name    // and their respective costs.    strcpy(m[2].hotel, "Banu_Hotel");    strcpy(m[2].first_food, "Parotta");    strcpy(m[2].second_food, "Noodles");    strcpy(m[2].third_food, "Chicken_Rice");    m[2].first = 15;    m[2].second = 75;    m[2].third = 80;     // Initializing the structure with    // SR_Bhavan hotel and some foods    // name and their respective costs.    strcpy(m[3].hotel, "SR_Bhavan");    strcpy(m[3].first_food, "Chicken_Biriyani");    strcpy(m[3].second_food, "Prawn");    strcpy(m[3].third_food, "Faloda");    m[3].first = 90;    m[3].second = 120;    m[3].third = 35;} // Function to implement the search// by hotelsvoid search_by_hotels(){    hotel_initialize();    printf(""           "\n\nPlease Choose the");    printf("hotels\n\n1) %s\n2) %s\n3) %s",           m[1].hotel,           m[2].hotel, m[3].hotel);    printf("\n4) Exit\n\nPlease ");    printf("select the hotel\t");    scanf("%d", &hotel_choice);    if (hotel_choice > 4) {        printf("Please Enter the");        printf("valid choice\n\n");        search_by_hotels();    }    else if (hotel_choice == 4)        // exit(1);        return;    else        hotels(hotel_choice);} // Function to implement the hotelvoid hotels(int hotel_choice){    total = 0;    while (1) {        // Displays the list of        // foods available in        // selected hotel        printf("\n\nList of foods available");         printf("in %s\n\n1) %s\tRs: %d\n2)",               m[hotel_choice].hotel,               m[hotel_choice].first_food,               m[hotel_choice].first);         printf("%s\tRs: %d\n3) %s\tRs: %d\n4)",               m[hotel_choice].second_food,               m[hotel_choice].second,               m[hotel_choice].third_food,               m[hotel_choice].third);         printf("Cart\n5) Exit\n\nPlease Enter");        printf("Your Choice\t");        scanf("%d", &food_choice);         // Get the input for no        // of foods to calculate        // the total amount        if (food_choice == 1) {            printf("Please Enter the ");            printf("Count of %s\t",                   m[hotel_choice].first_food);            scanf("%d", &n);            total = total                    + (n * m[hotel_choice].first);        }        else if (food_choice == 2) {            printf("Please Enter the Count");            printf("of %s\t",                   m[hotel_choice].second_food);            scanf("%d", &n);            total = total                    + (n * m[hotel_choice].second);        }        else if (food_choice == 3) {            printf("Please Enter the Count");            printf("of %s\t",                   m[hotel_choice].third_food);            scanf("%d", &n);            total = total                    + (n * m[hotel_choice].third);        }         // Once the user, completed their        // order, they can go to cart        // by giving choice as 4.        else if (food_choice == 4) {            cart();        }        else if (food_choice == 5) {            search_by_hotels();        }        else {            printf("Please Enter the");            printf("valid Choice\n\n");        }    }} void search_by_food(){    total = 0;    // Initialize all the    // hotels and their foods    hotel_initialize();    while (1) {        printf("\n\nPlease choose the ");        printf("food\n\n1) %s\t%d\n2) %s\t%d",               m[1].first_food, m[1].first,               m[1].second_food, m[1].second);         printf("\n3) %s\t%d\n4) %s\t%d\n",               m[1].third_food, m[1].third,               m[2].first_food, m[2].first);         printf("5) %s\t%d\n6) %s\t%d\n",               m[2].second_food, m[2].second,               m[2].third_food, m[2].third);         printf("7) %s\t%d\n8) %s\t%d\n",               m[3].first_food, m[3].first,               m[3].second_food, m[3].second);         printf("9) %s\t%d\n10) Cart\n",               m[3].third_food,               m[3].third);        printf("11) Exit");        printf("\nPlease Enter Your Choice\t");        scanf("%d", &food);        if (food > 10) {            printf("Please Enter the ");            printf("valid choice\n\n");            search_by_food();        }        // Moves to the cart        // functionality        else if (food == 10)            cart();        else if (food == 11)            // exit(1);            return;        // Call food_order functionality        // to get the no of foods and        // to calculate the total        // amount of the order.        else            food_order(food);    }} // Function to implement the food// order functionalityvoid food_order(int food){    if (food >= 1 && food <= 3)        hotel_id = 1;    else if (food >= 4 && food <= 6)        hotel_id = 2;    else        hotel_id = 3;    if ((food % 3) == 1) {        printf("Please Enter the");        printf(" Count of %s\t",               m[hotel_id].first_food);        scanf("%d", &n);        total = total + (n * m[hotel_id].first);    }    else if ((food % 3) == 2) {        printf("Please Enter the ");        printf("Count of %s\t",               m[hotel_id].second_food);        scanf("%d", &n);        total = total + (n * m[hotel_id].second);    }    else if ((food % 3) == 0) {        printf("Please Enter the ");        printf("Count of %s\t",               m[hotel_id].third_food);        scanf("%d", &n);        total = total + (n * m[hotel_id].third);    }} // Function to implement the cartvoid cart(){    printf("\n\n\n\n--------------Cart");    printf("----------------");    printf("\nYour Total Order");    printf("Amount is %d\n", total);    printf("\n\nDo You wish to");    printf("order (y=1/n=0):");    scanf("%d", &ch);    if (ch == 1) {        printf("\n\nThank You for your");        printf("order!! Your Food is on ");        printf("the way. Welcome again!!\n\n");        // exit(1);        return;    }    else if (ch == 0) {        printf("Do You want to exit -1");        printf("or Go back -0");        scanf("%d", &confirm);        if (confirm == 1) {            printf("\n\nOops! Your order is");            printf("cancelled!! Exiting..");            printf("Thank You visit again!\n");            // exit(1);            return;        }        else {            printf("\n\nThank You\n\n");            login();        }    }    else {        printf("\n\nPlease Enter the ");        printf("correct choice\n\n");        cart();    }}
Output:
Boilerplate Code:
Signup:
Login:
Validate:
Account Check:
Search By Hotels:
Search By Food:
Cart:
sumitgumber28
simmytarika5
C-programming
C Language
C Programs
Project
School Programming
Writing code in comment?
Please use ide.geeksforgeeks.org,
generate link and share the link here.