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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 Decimal

C Program to Convert Hexadecimal to Decimal

✅ C Program to Convert Hexadecimal to Decimal

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

    printf("Decimal: %d\n", num);
    return 0;
}

📘 Explanation:

This program converts a hexadecimal number into its decimal form.

  • scanf("%x", &num) → reads a number in hexadecimal format and stores it in an integer.
  • printf("%d", num) → prints the decimal equivalent of the number.
  • No manual calculation is required since C handles the conversion automatically.

🧾 Sample Output:

Enter a hexadecimal number: 1A
Decimal: 26

Enter a hexadecimal number: FF
Decimal: 255

🔑 Keywords:

C program hex to decimal, hexadecimal to decimal conversion, scanf %x example, C programming basics, interview C programs

📌 Hashtags:

#CProgramming #HexToDecimal #CodingForBeginners #InterviewQuestions #LearnC

🔍 Search Description:

This C program converts a hexadecimal number to decimal using scanf with %x format specifier. Simple explanation with output examples.

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