C incoming data

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

#define MAX_DATA 100  // Maximum number of stored values (can be dynamic if needed)

// Structure to store a value and its timestamp
typedef struct {
    int value;
    time_t timestamp;
} Data;

// Global buffer to store data and the index of the next position in the buffer
Data data_buffer[MAX_DATA];
int buffer_index = 0;
int data_count = 0;

// Function to calculate sum of values in the last 10 seconds
int calculate_sum() {
    time_t current_time = time(NULL);
    int sum = 0;

    // Iterate over the data buffer and sum values within the last 10 seconds
    for (int i = 0; i < data_count; i++) {
        if (difftime(current_time, data_buffer[i].timestamp) <= 10) {
            sum += data_buffer[i].value;
        }
    }

    return sum;
}

// Function to add new data to the buffer
void add_data(int value) {
    time_t current_time = time(NULL);

    // Add new data to the buffer
    data_buffer[buffer_index].value = value;
    data_buffer[buffer_index].timestamp = current_time;

    // Update buffer index and count
    buffer_index = (buffer_index + 1) % MAX_DATA;
    if (data_count < MAX_DATA) {
        data_count++;
    }
}

// Function to discard old data and update the buffer
void update_data() {
    time_t current_time = time(NULL);

    // Remove data older than 10 seconds
    int i = 0;
    while (i < data_count) {
        if (difftime(current_time, data_buffer[i].timestamp) > 10) {
            // Shift elements to remove the old data
            for (int j = i; j < data_count - 1; j++) {
                data_buffer[j] = data_buffer[j + 1];
            }
            data_count--;
        } else {
            i++;
        }
    }
}

int main() {
    // Seed the random number generator
    srand(time(NULL));

    // Simulate incoming data with random intervals and values
    while (1) {
        // Simulate random wait time between 1 to 3 seconds
        int wait_time = rand() % 3 + 1;
        sleep(wait_time);

        // Simulate random data value between 1 and 10
        int value = rand() % 10 + 1;
        printf("Received value: %d\n", value);

        // Update data and calculate sum
        add_data(value);
        update_data();

        int sum = calculate_sum();
        printf("Sum of values in the last 10 seconds: %d\n", sum);
    }

    return 0;
}