Dynamic Sensor Buffer

Question

Problem: Dynamic Sensor Buffer. Solve this hands-on electronics task on EWskills.

Accepted Answer

#include 

int main() {
    int n;
    std::cin >> n;

    if (n < 1) {
        return 0;
    }

    int* samples = new int[n];   // dynamic sensor buffer

    int sum = 0;
    for (int i = 0; i < n; i++) {
        std::cin >> samples[i];
        sum += samples[i];
    }

    int average = sum / n;       // integer division
    std::cout << average;

    delete[] samples;            // free allocated memory
    return 0;
}

Explanation & Logic Summary:

Sensor burst size is determined at runtime, requiring dynamic allocation.
new[] allocates memory sized exactly to the required number of samples.
Sensor readings are accumulated and averaged using integer arithmetic.
delete[] is required to prevent memory leaks in long-running firmware systems.

Firmware Relevance & Real-World Context:

Embedded firmware frequently handles variable-length data buffers:
- ADC sampling bursts
- IMU or sensor fusion windows
- UART or DMA receive buffers
Dynamic allocation must be used carefully:
- Allocate only when necessary
- Release immediately after use
- Avoid long-lived heap usage
This task evaluates:
- Heap usage discipline
- Memory lifecycle awareness
- Safe handling of runtime-sized data

26. Dynamic Sensor Buffer