inventory-management.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>

// Function declarations
void menu();
void transaction();
void buying();
void selling();
void searchdata();
void showDetails();
void profit_loss_data();


struct veg {
    int SN;                 
    char name[20];          
    float quantity;         
    float rate;             
} v[100], temp[100];

// introduce a delay for loading animation
void delay(int mseconds) {
    clock_t goal = mseconds + clock(); 
    while (goal > clock());            
}

// entry point of the program
void main() {
    int loader; // counter for loading animation

    // set console colors
    system("COLOR 0A");
    printf("Loading...");

    // display a loading animation
    for (loader = 1; loader < 20; loader++) {
        delay(50); // introduce a delay for animation
        printf(".");
    }

    // call the main menu function 
    menu();
}

// display the main manu 
void menu() {
    system("cls"); // Clear the console
    printf("WELCOME TO INVENTORY MANAGEMENT SYSTEM\n");
    printf("1. Transaction\n");
    printf("2. View Details\n");
    printf("3. Exit\n");
    printf("Enter your choice: ");

    char choice;
    scanf(" %c", &choice); 

    switch (choice) {
        case '1': 
            transaction();
            break;
        case '2': 
            showDetails();
            break;
        case '3': 
            printf("Exiting program. Goodbye!\n");
            exit(0);
        default: 
            printf("Invalid choice! Try again.\n");
            getchar(); 
            menu(); 
    }
}

// display the transaction menu
void transaction() {
    system("cls"); // clear the console
    printf("TRANSACTION MENU\n");
    printf("1. Buying\n");
    printf("2. Selling\n");
    printf("3. Back to Menu\n");
    printf("Enter your choice: ");

    char choice;
    scanf(" %c", &choice);

    switch (choice) {
        case '1': 
            buying();
            break;
        case '2': 
            selling();
            break;
        case '3': 
            menu();
            break;
        default: 
            printf("Invalid choice! Try again.\n");
            getchar();
            transaction();
    }
}

// handle buying transactions
void buying() {
    system("cls"); // clear the console
    FILE *fp = fopen("buyingdata.txt", "a"); /
    if (fp == NULL) { 
        printf("Error opening file.\n");
        return;
    }

    struct veg item;
    // collect item details from the user
    printf("Enter item name: ");
    scanf("%s", item.name);
    printf("Enter quantity: ");
    scanf("%f", &item.quantity);
    printf("Enter rate: ");
    scanf("%f", &item.rate);

    fprintf(fp, "%s %.2f %.2f\n", item.name, item.quantity, item.rate);
    fclose(fp); // Close the file

    printf("Item added successfully!\n");
    transaction(); // return to the transaction 
}

// handle selling transactions
void selling() {
    system("cls");
    FILE *fp = fopen("sellingdata.txt", "a");
    if (fp == NULL) {
        printf("Error opening file.\n");
        return;
    }

    struct veg item;
    printf("Enter item name: ");
    scanf("%s", item.name);
    printf("Enter quantity: ");
    scanf("%f", &item.quantity);
    printf("Enter rate: ");
    scanf("%f", &item.rate);

    fprintf(fp, "%s %.2f %.2f\n", item.name, item.quantity, item.rate);
    fclose(fp);

    printf("Item added successfully!\n");
    transaction();
}

// display the details 
void showDetails() {
    system("cls");
    printf("VIEW DETAILS MENU\n");
    printf("1. Search Data\n");
    printf("2. View Profit/Loss\n");
    printf("3. Back to Menu\n");
    printf("Enter your choice: ");

    char choice;
    scanf(" %c", &choice);

    switch (choice) {
        case '1': 
            searchdata();
            break;
        case '2': 
            profit_loss_data();
            break;
        case '3': 
            menu();
            break;
        default: 
            printf("Invalid choice! Try again.\n");
            getchar();
            showDetails();
    }
}

// search for an item 
void searchdata() {
    system("cls");
    printf("Enter the item name to search: ");
    char itemName[20];
    scanf("%s", itemName);

    FILE *fp = fopen("buyingdata.txt", "r");
    if (fp == NULL) {
        printf("Error opening file.\n");
        return;
    }

    struct veg item;
    int found = 0;
    while (fscanf(fp, "%s %f %f", item.name, &item.quantity, &item.rate) != EOF) {
        if (strcmp(item.name, itemName) == 0) {
            printf("Item found in buying records: %s, Quantity: %.2f, Rate: %.2f\n", item.name, item.quantity, item.rate);
            found = 1;
        }
    }
    fclose(fp);

    fp = fopen("sellingdata.txt", "r");
    if (fp == NULL) {
        printf("Error opening file.\n");
        return;
    }

    while (fscanf(fp, "%s %f %f", item.name, &item.quantity, &item.rate) != EOF) {
        if (strcmp(item.name, itemName) == 0) {
            printf("Item found in selling records: %s, Quantity: %.2f, Rate: %.2f\n", item.name, item.quantity, item.rate);
            found = 1;
        }
    }
    fclose(fp);

    if (!found) {
        printf("Item not found in records.\n");
    }

    printf("Press Enter to return to menu.\n");
    getchar();
    getchar();
    showDetails();
}

// calculate and display profit or loss
void profit_loss_data() {
    system("cls");
    printf("PROFIT/LOSS DATA\n");

    FILE *buyFile = fopen("buyingdata.txt", "r");
    FILE *sellFile = fopen("sellingdata.txt", "r");

    if (buyFile == NULL || sellFile == NULL) {
        printf("Error opening files.\n");
        return;
    }

    float buyingCost = 0, sellingRevenue = 0;
    struct veg item;

    while (fscanf(buyFile, "%s %f %f", item.name, &item.quantity, &item.rate) != EOF) {
        buyingCost += item.quantity * item.rate;
    }
    fclose(buyFile);

    while (fscanf(sellFile, "%s %f %f", item.name, &item.quantity, &item.rate) != EOF) {
        sellingRevenue += item.quantity * item.rate;
    }
    fclose(sellFile);

    printf("Total Buying Cost: %.2f\n", buyingCost);
    printf("Total Selling Revenue: %.2f\n", sellingRevenue);

    if (sellingRevenue > buyingCost) {
        printf("Profit: %.2f\n", sellingRevenue - buyingCost);
    } else {
        printf("Loss: %.2f\n", buyingCost - sellingRevenue);
    }

    printf("Press Enter to return to menu.\n");
    getchar();
    getchar();
    showDetails();
}