Bit-Fields in C - Real World Example

July 10, 2026

C++ Program to Perform Linear Search on a Vector

C++ Program to Perform Linear Search on a Vector Introduction In this C++ program, we will learn how to perform a Linear Search on a vector. The program first takes the size of the vector and its elements as input. Then it asks the user for the element to search. If the element is found, it displays the index where it is located. Otherwise, it displays a message indicating that the element is not found. C++ Program #include<bits/stdc++.h> using namespace std; int main() { int num, search, found = 0; cout << "Enter the size of the vector:" << endl; cin >> num; vector<int> v(num); cout << "Enter " << num << " elements in vector:" << endl; for(int i = 0; i < num; i++) { cin >> v[i]; } cout << "Enter element that you want to search:" << endl; cin >> search; for(int i = 0; i < num; i++) { ...

📌 Bit-Fields in C – Real World Example

🔋 1. Embedded System: Status Flags using Bit-Fields

#include <stdio.h>

struct StatusFlags {
    unsigned int powerOn : 1;
    unsigned int error : 1;
    unsigned int batteryLow : 1;
    unsigned int reserved : 5;
};

int main() {
    struct StatusFlags device = {1, 0, 1, 0};

    printf("Power ON: %u\n", device.powerOn);
    printf("Error: %u\n", device.error);
    printf("Battery Low: %u\n", device.batteryLow);

    return 0;
}

🧠 Explanation:

struct StatusFlags uses only 8 bits (1 byte) instead of 4 bytes.
Each flag (like power, error) is a bit-field that takes just 1 bit.
Perfect for embedded systems where memory and performance are critical.

🖥️ Sample Output:

Power ON: 1
Error: 0
Battery Low: 1

🔑 Keywords:

bit field in C, struct with bit-fields, embedded systems flags, memory-efficient C code, real-world struct usage, flag register, C interview examples

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C++ Program to Perform Linear Search on a Vector