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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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C Program to Convert Hexadecimal to Octal

C Program to Convert Hexadecimal to Octal

✅ C Program to Convert Hexadecimal to Octal

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

    printf("Octal: %o\n", num);   // print in octal
    return 0;
}

📘 Explanation:

This program converts a hexadecimal number into its octal form.

  • scanf("%x", &num) → reads a number in hexadecimal format and stores it as an integer.
  • printf("%o", num) → prints the same number in octal format.
  • No manual conversion is needed — C automatically handles it using format specifiers.

🧾 Sample Output:

Enter a hexadecimal number: 1A
Octal: 32

Enter a hexadecimal number: FF
Octal: 377

🔑 Keywords:

C program hex to octal, hexadecimal to octal conversion, scanf %x example, printf %o example, number system conversion in C

📌 Hashtags:

#CProgramming #HexToOctal #CodingForBeginners #InterviewQuestions #LearnC

🔍 Search Description:

This C program converts a hexadecimal number to octal using scanf with %x and printf with %o format specifiers. Includes explanation and sample outputs.

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