25. Reset Fault Buffer

#include <iostream>
using namespace std;

int main() {
    int code;
    cin >> code;

    int* faultBuf = new int;   // dynamic allocation
    *faultBuf = code;

    cout << *faultBuf << " "; // print stored code

    delete faultBuf;          // free memory
    faultBuf = nullptr;       // reset pointer

    if (faultBuf == nullptr)
        cout << "OK";
    else
        cout << "NOT_OK";

    return 0;
}

Explanation & Logic Summary:

• Dynamic memory stores the fault code temporarily.
• Memory is freed using delete.
• Pointer reset prevents accidental reuse or double delete.
• Final check ensures the pointer was properly cleared.

Firmware Relevance & Real-World Context:

• Fault buffers and diagnostic logs are often allocated dynamically in embedded firmware.
• Resetting pointers after deletion avoids undefined behavior and memory corruption.
• This pattern appears in watchdog handlers, error recovery logic, and diagnostic modules.