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Saturday, March 29, 2025

C program to deliver the product at the address

 Here's a simplified C program that simulates delivering a product to an address:


Product Delivery Program


#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <time.h>


// Define structure for products

typedef struct {

    int id;

    char name[50];

    float price;

} Product;


// Define structure for addresses

typedef struct {

    char street[100];

    char city[50];

    char state[50];

    int zip;

} Address;


// Define structure for deliveries

typedef struct {

    Product product;

    Address address;

    time_t deliveryTime;

} Delivery;


// Function to create a new product

Product createProduct(int id, char *name, float price) {

    Product product;

    product.id = id;

    strcpy(product.name, name);

    product.price = price;

    return product;

}


// Function to create a new address

Address createAddress(char *street, char *city, char *state, int zip) {

    Address address;

    strcpy(address.street, street);

    strcpy(address.city, city);

    strcpy(address.state, state);

    address.zip = zip;

    return address;

}


// Function to create a new delivery

Delivery createDelivery(Product product, Address address) {

    Delivery delivery;

    delivery.product = product;

    delivery.address = address;

    delivery.deliveryTime = time(NULL);

    return delivery;

}


// Function to display delivery details

void displayDelivery(Delivery delivery) {

    printf("Product ID: %d\n", delivery.product.id);

    printf("Product Name: %s\n", delivery.product.name);

    printf("Product Price: %.2f\n", delivery.product.price);

    printf("Delivery Address: %s, %s, %s %d\n", delivery.address.street, delivery.address.city, delivery.address.state, delivery.address.zip);

    printf("Delivery Time: %s", ctime(&delivery.deliveryTime));

}


int main() {

    // Create products

    Product product1 = createProduct(1, "Laptop", 999.99);

    Product product2 = createProduct(2, "Smartphone", 799.99);


    // Create addresses

    Address address1 = createAddress("123 Main St", "Anytown", "CA", 12345);

    Address address2 = createAddress("456 Elm St", "Othertown", "NY", 67890);


    // Create deliveries

    Delivery delivery1 = createDelivery(product1, address1);

    Delivery delivery2 = createDelivery(product2, address2);


    // Display delivery details

    printf("Delivery 1:\n");

    displayDelivery(delivery1);

    printf("\nDelivery 2:\n");

    displayDelivery(delivery2);


    return 0;

}


This program demonstrates the following concepts:


1. *Product structure*: A structure to represent products with attributes like ID, name, and price.

2. *Address structure*: A structure to represent addresses with attributes like street, city, state, and zip.

3. *Delivery structure*: A structure to represent deliveries with attributes like product, address, and delivery time.

4. *Delivery creation*: Functions to create products, addresses, and deliveries.

5. *Delivery display*: A function to display delivery details.


Note that this program is a highly simplified example and does not cover real-world complexities like logistics, payment processing, and order management.

C program to make a cryptocurrency

 Creating a cryptocurrency is a complex task that requires a deep understanding of cryptography, networking, and economics. Here's a simplified C program that demonstrates some basic concepts:


Cryptocurrency Program


#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <time.h>


// Define structure for blocks

typedef struct Block {

    int index;

    time_t timestamp;

    char previousHash[64];

    char hash[64];

    char data[256];

} Block;


// Define structure for transactions

typedef struct Transaction {

    char sender[50];

    char receiver[50];

    float amount;

} Transaction;


// Define structure for blockchain

typedef struct Blockchain {

    Block *blocks;

    int blockCount;

} Blockchain;


// Function to create a new block

Block createBlock(int index, time_t timestamp, char *previousHash, char *data) {

    Block block;

    block.index = index;

    block.timestamp = timestamp;

    strcpy(block.previousHash, previousHash);

    strcpy(block.data, data);

    // Calculate hash using SHA-256

    // For simplicity, this example uses a fake hash function

    sprintf(block.hash, "Hash%d", index);

    return block;

}


// Function to add a new block to the blockchain

void addBlock(Blockchain *blockchain, Block block) {

    blockchain->blocks = realloc(blockchain->blocks, (blockchain->blockCount + 1) * sizeof(Block));

    blockchain->blocks[blockchain->blockCount] = block;

    blockchain->blockCount++;

}


// Function to create a new transaction

Transaction createTransaction(char *sender, char *receiver, float amount) {

    Transaction transaction;

    strcpy(transaction.sender, sender);

    strcpy(transaction.receiver, receiver);

    transaction.amount = amount;

    return transaction;

}


// Function to add a new transaction to the blockchain

void addTransaction(Blockchain *blockchain, Transaction transaction) {

    // For simplicity, this example assumes transactions are stored in the block data

    char data[256];

    sprintf(data, "Transaction from %s to %s for %.2f", transaction.sender, transaction.receiver, transaction.amount);

    Block block = createBlock(blockchain->blockCount, time(NULL), blockchain->blocks[blockchain->blockCount - 1].hash, data);

    addBlock(blockchain, block);

}


int main() {

    Blockchain blockchain;

    blockchain.blocks = malloc(sizeof(Block));

    blockchain.blockCount = 0;


    // Create genesis block

    Block genesisBlock = createBlock(0, time(NULL), "Genesis", "Genesis Block");

    addBlock(&blockchain, genesisBlock);


    // Create transactions

    Transaction transaction1 = createTransaction("Alice", "Bob", 10.0);

    Transaction transaction2 = createTransaction("Bob", "Charlie", 5.0);


    // Add transactions to the blockchain

    addTransaction(&blockchain, transaction1);

    addTransaction(&blockchain, transaction2);


    // Print blockchain

    for (int i = 0; i < blockchain.blockCount; i++) {

        printf("Block %d:\n", blockchain.blocks[i].index);

        printf("Timestamp: %ld\n", blockchain.blocks[i].timestamp);

        printf("Previous Hash: %s\n", blockchain.blocks[i].previousHash);

        printf("Hash: %s\n", blockchain.blocks[i].hash);

        printf("Data: %s\n\n", blockchain.blocks[i].data);

    }


    return 0;

}


This program demonstrates the following concepts:


1. *Blockchain*: A chain of blocks, each containing a timestamp, previous hash, hash, and data.

2. *Blocks*: Individual units of the blockchain, containing a unique index, timestamp, previous hash, hash, and data.

3. *Transactions*: Data stored in the blocks, representing a transfer of value between parties.

4. *Hash function*: A function that takes input data and produces a fixed-size string of characters, used to identify blocks and transactions.


Note that this program is a highly simplified example and is not suitable for creating a real-world cryptocurrency. A real cryptocurrency would require a much more complex implementation, including:


- A secure hash function, such as SHA-256

- A consensus algorithm, such as proof-of-work or proof-of-stake

- A network of nodes to validate and relay transactions

- A wallet system for users to store and manage their cryptocurrency

- A user-friendly interface for interacting with the cryptocurrency

The rotation of money in business

 The rotation of money in business refers to the flow of funds within a company, encompassing various financial activities and transactions....