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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 Find Fibonacci Number

 

C++ Program to Find Fibonacci Number

✅ C++ Program to Find Fibonacci Number (Iterative Method)


#include <iostream>
using namespace std;

int fib(int n)
{
    if (n == 0) return 0;
    if (n == 1) return 1;

    int a = 0, b = 1, c;

    for (int i = 2; i <= n; i++)
    {
        c = a + b;
        a = b;
        b = c;
    }
    return b;
}

int main()
{
    int n;
    cout << "Enter a number: ";
    cin >> n;

    cout << "Fibonacci number = " << fib(n);
    return 0;
}

📘 Explanation:

This C++ program calculates the Fibonacci number for a given input using the iterative approach.

The Fibonacci sequence starts as: 0, 1, 1, 2, 3, 5, 8, ...

Each number is the sum of the previous two numbers. This program avoids recursion and uses a loop, which makes it more efficient in terms of time and memory.

🧾 Sample Output:

Enter a number:
7
Fibonacci number = 13

🔑 Keywords:

C++ Fibonacci program, Fibonacci number in C++, iterative Fibonacci, C++ loop programs, number series in C++

🔍 Search Description:

Learn how to find Fibonacci number in C++ using an efficient iterative method. Includes full program, explanation, and output.

📌 Hashtags:

#CPlusPlus #Fibonacci #CPPPrograms #ProgrammingBasics #DSA #1printf

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