utility.c

/*Project by:
Hamza Nizamani SE231027
Abdullah Nabi Ahmed SE231040
Jawad Nasir SE231041
*/
#include <stdio.h>

void calculate_bill();
void currency_conversion();
void estimateGroceries();
void displayGroceries(const char *groceries[], const double prices[]);
double calculateTotal(const int choices[], const double prices[], int size);

int main()
{
    int choose, a = 1;

    while (a == 1)
    {
        printf("\n**************************************WELCOME****************************************\n"
               "--> Enter 1 for Bill Calculation\n"
               "--> Enter 2 for Currency Conversions\n"
               "--> Enter 3 to Estimate Groceries Budget\n"
               "--> Enter 4 to Exit\n");

        scanf("%d", &choose);

        switch (choose)
        {
        case 1:
            calculate_bill();
            break;
        case 2:
            currency_conversion();
            break;
        case 3:
            estimateGroceries();
            break;
        case 4:
            printf("Exiting the program. Goodbye!\n");
            a = 0;
            break;
        default:
            printf("Invalid Entry!!\n");
            break;
        }
    }

    return 0;
}

// Bill function
void calculate_bill()
{
    int choose, curr_units, prev_units, units;
    float bill;

    printf("\nPlease,\n");
    printf("--> Enter 1 for Electricity Bill\n");
    printf("--> Enter 2 for Gas Bill\n");

    scanf("%d", &choose);

    switch (choose)
    {
    case 1:
        printf("Please enter number of units for this month: ");
        scanf("%d", &curr_units);
        printf("Please enter number of units for the previous month: ");
        scanf("%d", &prev_units);

        units = curr_units - prev_units;

        if (units <= 200)
        {
            printf("Your bill for this month is Rs %.3f", bill = units * 50);
        }
        else if (units > 200)
        {
            printf("Your bill for this month is Rs %.3f", bill = units * 61);
        }
        break;
    case 2:
        printf("Please enter number of units for this month: ");
        scanf("%d", &curr_units);
        printf("Please enter number of units for the previous month: ");
        scanf("%d", &prev_units);

        units = curr_units - prev_units;

        if (units <= 100)
        {
            printf("Your bill for this month is R.s %f", bill = units * 18);
        }
        else if (units > 150)
        {
            printf("Your bill for this month is R.s %f", bill = units * 30);
        }
        break;

    default:
        printf("Invalid Entry!!");
        break;
    }
}

// Currency conversion function
void currency_conversion()
{
    int currency;
    double amount, converted;

    printf("\nSelect the currency you want to exchange:\n");
    printf("1. USD to PKR\n");
    printf("2. PKR to USD\n");
    printf("3. DIRHAM to PKR\n");
    printf("4. PKR to DIRHAM\n");
    printf("5. RIYAL to PKR\n");
    printf("6. PKR to RIYAL\n");
    printf("7. POUND to PKR\n");
    printf("8. PKR to POUND\n");
    printf("9. EUR to PKR\n");
    printf("10. PKR to EUR\n");
    scanf("%d", &currency);

    switch (currency)
    {
    case 1:
        printf("Enter your amount in USD: ");
        scanf("%lf", &amount);
        printf("PKR = %.2lf", converted = amount * 276.91);
        break;
    case 2:
        printf("Enter your amount in PKR: ");
        scanf("%lf", &amount);
        printf("USD = %.2lf", converted = amount / 276.91);
        break;
    case 3:
        printf("Enter your amount in DIRHAMS: ");
        scanf("%lf", &amount);
        printf("PKR = %.2lf", converted = amount * 75.89);
        break;
    case 4:
        printf("Enter your amount in PKR: ");
        scanf("%lf", &amount);
        printf("DIRHAM = %.2lf", converted = amount / 75.89);
        break;
    case 5:
        printf("Enter your amount in RIYAL: ");
        scanf("%lf", &amount);
        printf("PKR = %.2lf", converted = amount * 74.32);
        break;
    case 6:
        printf("Enter your amount in PKR: ");
        scanf("%lf", &amount);
        printf("RIYAL = %.2lf", converted = amount / 74.32);
        break;
    case 7:
        printf("Enter your amount in POUND: ");
        scanf("%lf", &amount);
        printf("PKR = %.2lf", converted = amount * 351.99);
        break;
    case 8:
        printf("Enter your amount in PKR: ");
        scanf("%lf", &amount);
        printf("POUND = %.2lf", converted = amount / 351.99);
        break;
    case 9:
        printf("Enter your amount in EUR: ");
        scanf("%lf", &amount);
        printf("PKR = %.2lf", converted = amount * 304.41);
        break;
    case 10:
        printf("Enter your amount in PKR: ");
        scanf("%lf", &amount);
        printf("EUR = %.2lf", converted = amount / 304.41);
        break;
    default:
        printf("SELECT A VALID CURRENCY!!\n");
        break;
    }
}
// Groceries function
void estimateGroceries()
{
    const char *groceries[8] = {"Bread", "Milk(1L)", "Eggs(1 Dozen)", "Cheese", "Cooking Oil(1L)", "Rice(5kg)", "Sugar(1kg)", "Salt(1kg)"};
    const double prices[8] = {120.50, 180.20, 320.80, 3000.50, 2400.87, 1800.85, 180.00, 200.00};

    int userChoices[8] = {0};
    int choice;
    double totalAmount = 0;

    do
    {
        displayGroceries(groceries, prices);

        printf("\nEnter the number of the grocery to add to your basket (0 to finish): ");
        scanf("%d", &choice);

        if (choice >= 1 && choice <= 8)
        {
            userChoices[choice - 1]++;
            totalAmount += prices[choice - 1];
        }
        else if (choice != 0)
        {
            printf("Invalid choice. Please enter a number between 1 and %d.\n", 8);
        }

    } while (choice != 0);

    printf("\nYour Choices:\n");
    for (int i = 0; i < 8; i++)
    {
        if (userChoices[i] > 0)
        {
            printf("%-15s - Quantity: %d\n", groceries[i], userChoices[i]);
        }
    }

    printf("\nYour Estimated Grocery Budget is: Rs %.2f\n", totalAmount);
}

// For displaying groceries function
void displayGroceries(const char *groceries[], const double prices[])
{
    printf("\nList of items:\n");
    for (int i = 0; i < 8; i++)
    {
        printf("%d. %-15s \t- Rs %.2f\n", i + 1, groceries[i], prices[i]);
    }
}