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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 Find Remainder Without Using % Operator

C Program to Find Remainder Without Using % Operator

✅ C Program to Find Remainder Without Using % Operator

#include <stdio.h>
int main() {
    int a, b;
    printf("Enter two numbers (a %% b): ");
    scanf("%d %d", &a, &b);

    int sign = 1;
    if (a < 0) { a = -a; sign = -sign; } // handle negative dividend
    if (b < 0) { b = -b; }               // divisor just made positive

    while (a >= b) {
        a -= b;   // keep subtracting divisor from dividend
    }

    printf("Remainder is: %d\n", sign * a);
    return 0;
}

📘 Explanation:

This program calculates the remainder without using the modulus (%) operator. It repeatedly subtracts the divisor from the dividend until the remainder is smaller than the divisor.

  • Handles negative dividends by tracking the sign.
  • a -= b; keeps subtracting divisor until remainder is less.
  • Final result is adjusted using sign * a.

🧾 Sample Output:

Enter two numbers (a % b): 17 5
Remainder is: 2

Enter two numbers (a % b): -17 5
Remainder is: -2

🔑 Keywords:

C program remainder without %, modulus without operator, remainder using subtraction, arithmetic operators in C, tricky C programs

📌 Hashtags:

#CProgramming #Modulo #InterviewPrep #LearnC #BitwiseTricks

🔍 Search Description:

Learn how to find remainder in C without using modulus (%) operator. Uses repeated subtraction and handles negative numbers. Includes explanation and sample output.

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