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Merge Sort in C++

  Merge Sort in C++ Introduction Merge Sort is a popular sorting algorithm that follows the Divide and Conquer approach. It divides an array into smaller subarrays, recursively sorts those subarrays, and finally merges the sorted subarrays to produce a completely sorted array. In this tutorial, we will learn how to implement Merge Sort in C++ . The program divides the array into two halves using the mid index, recursively sorts both halves, and then combines them using the merge() function. Merge Sort has a time complexity of O(n log n) in the best, average, and worst cases. Table of Contents Algorithm C++ Program Input Sample Output Output Explanation Dry Run Flow of Execution Time Complexity Space Complexity Applications Key Points Interview Questions Frequently Asked Questions Keywords Conclusion Algorithm Start the program. Read the size of the array. Read the array elements from the user. Call the mer...
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C Program to Convert Hexadecimal to Binary

C Program to Convert Hexadecimal to Binary

✅ C Program to Convert Hexadecimal to Binary (Using Bitwise Operators)

#include <stdio.h>
int main() {
    int num;
    printf("Enter a hexadecimal number: ");
    scanf("%x", &num);   // read hex directly into int

    printf("Binary: ");
    for (int i = 31; i >= 0; i--) {
        int bit = (num >> i) & 1;
        printf("%d", bit);
    }
    printf("\n");
    return 0;
}

📘 Explanation:

This program converts a hexadecimal number into its binary form using bitwise operators.

  • scanf("%x", &num) → directly reads a hexadecimal number into an integer.
  • (num >> i) & 1 → extracts the i-th bit from the number.
  • Loop runs from bit 31 to 0 → prints all 32 bits (full binary representation).
  • Output shows the binary form padded to 32 bits.

🧾 Sample Output:

Enter a hexadecimal number: 1A
Binary: 00000000000000000000000000011010

Enter a hexadecimal number: FF
Binary: 00000000000000000000000011111111

🔑 Keywords:

C program hex to binary, hexadecimal to binary conversion, bitwise operators in C, scanf %x example, binary representation in C

📌 Hashtags:

#CProgramming #HexToBinary #BitwiseOperators #CodingForBeginners #InterviewQuestions

🔍 Search Description:

This C program converts hexadecimal to binary using bitwise operators. It reads hex with %x and prints the 32-bit binary representation.

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