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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 Demonstrate Friend Function

C++ Program to Demonstrate Friend Function

C++ Program to Demonstrate Friend Function


#include <iostream>
using namespace std;

class Sample
{
    int x;
public:
    Sample()
    {
        x = 10;
    }
    friend void show(Sample s);
};

void show(Sample s)
{
    cout << "Value of x = " << s.x << endl;
}

int main()
{
    Sample obj;
    show(obj);
    return 0;
}

📘 Explanation:

This program demonstrates the concept of a friend function in C++. A friend function is not a member of the class, but it can access the private and protected data members of the class.

  • The class Sample contains a private variable x.
  • The constructor initializes x with the value 10.
  • The function show() is declared as a friend inside the class.
  • Because it is a friend, show() can access the private variable x.

Friend functions are mainly used when a function needs access to class data but does not logically belong to the class.

🧾 Sample Output:

Value of x = 10

🔑 Keywords:

C++ friend function, accessing private members, C++ OOP concepts, friend function example, C++ classes and objects

📌 Hashtags:

#CPlusPlus #FriendFunction #OOP #CPPBasics #Programming #1printf

🔍 Search Description:

Learn how friend functions work in C++ with a simple example that accesses private data members. Includes explanation, output, and dark-themed code.

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