[19/12, 12:50 pm] Rajadurai: #include <stdio.h>
#include <string.h>

struct Inventory
{
    int id;
    char name[30];
    int quantity;
    float price;
};
int main()
{
    struct Inventory item[10];
    int n, i, choice;
    int found;
    int addQty, sellQty;
    char searchItem[60];

    printf("Enter number of items: ");
    scanf("%d", &n);

    /* Input inventory details */
    for(i = 0; i < n; i++)
    {
        printf("ID: ");
        scanf("%d", &item[i].id);
        printf("Name: ");
        scanf("%s", item[i].name);
        printf("Quantity: ");
        scanf("%d", &item[i].quantity);
        printf("Price: ");
        scanf("%f", &item[i].price);
    }
    do
    {
        printf("--- Inventory Menu ---");
        printf("\n1. View Items");
        printf("\n2. Add Stock");
        printf("\n3. Sell Item");
        printf("\n4. Exit");
        printf("\nEnter your choice: ");
        scanf("%d", &choice);

        switch(choice)
        {
            case 1:
                printf("\nID\tName\tQuantity\tPrice\n");
                for(i = 0; i < n; i++)
                {
                    printf("%d\t%s\t%d\t\t%.2f\n",
                           item[i].id,
                           item[i].name,
                           item[i].quantity,
                           item[i].price);
                }
                break;

            case 2:
                printf("Enter item name to add stock: ");
                scanf("%s", searchItem);
                found = 0;

                for(i = 0; i < n; i++)
                {
                    if(strcmp(item[i].name,searchItem)==0)
                    {
                        found=1;
                        printf("Enter quantity to add: ");
                        scanf("%d", &addQty);
                        item[i].quantity += addQty;
                        printf("Stock added successfully.\n");
                        printf("Available quantity =%d\n",item[i]. quantity);
                        break;
                    }
                }
                if(found == 0)
                    printf("Item not found.\n");
                break;

            case 3:
                printf("Enter item name to sell: ");
                scanf("%s", searchItem);
                
                
                
                for(i = 0; i < n; i++)
                {
                    if(strcmp(item[i].name,searchItem)==0)
                    
                    {
                        printf("Enter quantity to sell: ");
                        scanf("%d", &sellQty);

                        if(item[i].quantity >= sellQty)
                        {
                            item[i].quantity -= sellQty;
                            printf("Item sold successfully.\n");
                            printf("Available quantity =%d\n",item[i]. quantity);
                        }
                        else
                        {
                            printf("Insufficient stock.\n");
                        }
                    
                }
                
                else
                    printf("Item not found.\n");
                    }
                break;

            case 4:
                printf("Exiting program...\n");
                break;

            default:
                printf("Invalid choice. Try again.\n");
        }

    } while(choice != 4);

    return 0;
}
[19/12, 12:53 pm] Rajadurai: #include <stdio.h>
#include <string.h>

struct Book {
    int id;
    char title[50];
    char author[50];
    char publisher[50];
    int copies;
};

int main() {
    int choice, i, found;
    char searchTitle[50];

    struct Book lib[3] = {
        {101, "CProgramming", "Dennis", "PHI", 5},
        {102, "DataStructures", "Seymour", "McGraw", 3},
        {103, "OperatingSystems", "Silberschatz", "Wiley", 2}
    };

    int n = 3;

    do {
        printf("\n--- MENU ---\n");
        printf("1. Display All Books\n");
        printf("2. Issue a Book\n");
        printf("3. Return a Book\n");
        printf("4. Exit\n");
        printf("Enter your choice: ");
        scanf("%d", &choice);

        switch (choice) {

        // -------- DISPLAY BOOKS --------
        case 1:
            printf("\nID\tTitle\t\tAuthor\t\tPublisher\tCopies\n");
            for (i = 0; i < n; i++) {
                printf("%d\t%-15s %-15s %-15s %d\n",
                       lib[i].id,
                       lib[i].title,
                       lib[i].author,
                       lib[i].publisher,
                       lib[i].copies);
            }
            break;

        // -------- ISSUE BOOK --------
        case 2:
            found = 0;
            printf("Enter title to issue: ");
            scanf("%s", searchTitle);

            for (i = 0; i < n; i++) {
                if (strcmp(lib[i].title, searchTitle) == 0) {
                    found = 1;
                    if (lib[i].copies > 0) {
                        lib[i].copies--;
                        printf("Book issued successfully.\n");
                    } else {
                        printf("Sorry! No copies available.\n");
                    }
                    break;
                }
            }
            if (!found) {
                printf("Book not found.\n");
            }
            break;

        // -------- RETURN BOOK --------
        case 3:
            found = 0;
            printf("Enter title to return: ");
            scanf("%s", searchTitle);

            for (i = 0; i < n; i++) {
                if (strcmp(lib[i].title, searchTitle) == 0) {
                    lib[i].copies++;
                    found = 1;
                    printf("Book returned successfully.\n");
                    break;
                }
            }
            if (!found) {
                printf("Book not found.\n");
            }
            break;

        // -------- EXIT --------
        case 4:
            printf("Exiting program...\n");
            break;

        default:
            printf("Invalid choice!\n");
        }

    } while (choice != 4);

    return 0;
}

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