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C Program to Solve Two Sum Using Brute Force (With Algorithm & Output)

 Introduction The Two Sum problem is a popular coding interview question where we must find two indices of an array whose values add up to a given target. This program demonstrates a simple brute-force solution in C using nested loops and dynamic memory allocation. Problem Statement Given an integer array and a target value, return the indices of the two numbers such that they add up to the target. Each input has exactly one solution, and the same element cannot be used twice. The result should return the indices, not the values. If no solution exists, return NULL.  Algorithm / Logic Explanation Start the program. Traverse the array using a loop from index 0 to numsSize - 1 . Inside this loop, use another loop starting from i + 1 to numsSize - 1 . For every pair (i, j) , check if nums[i] + nums[j] == target . If condition becomes true: Allocate memory for 2 integers using malloc() . Store indices i and j . Set returnSize = 2 . Return the result poi...
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Armstrong Number Check in C

Armstrong Number in C

✅ Armstrong Number Check in C

#include<stdio.h>
int main( )
{
    int num, remainder, temp, sum = 0;
    printf("Enter the number:\n");
    scanf("%d", &num);
    temp = num;
    while (num > 0)
    {
        remainder = num % 10;
        sum = sum + (remainder * remainder * remainder);
        num = num / 10;
    }
    if (temp == sum)
    {
        printf("%d is armstrong:\n", temp);
    }
    else
    {
        printf("%d is not armstrong:\n", temp);
    }
}

📘 Explanation:

An Armstrong number (also known as a narcissistic number) is a number that is equal to the sum of the cubes of its digits.

  • The user is prompted to enter an integer.
  • Each digit is separated using modulus (%) and divided out using division (/).
  • The cube of each digit is added to a sum.
  • Finally, if sum == original number, it is an Armstrong number.

Example: 153 → 1³ + 5³ + 3³ = 1 + 125 + 27 = 153 ✔️

💻 Sample Output:

Enter the number:
153
153 is armstrong:

🔑 Keywords:

Armstrong number in C, C Armstrong program, digit cube sum, Armstrong logic in C, C programming for beginners, Armstrong check using while loop, C interview coding question, temp and remainder in C

📌 Hashtags:

#CProgramming #ArmstrongNumber #BeginnerCPrograms #DigitExtraction #WhileLoopInC #CCodeForInterview #TechBlog #CodeWithMe

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