Add Two Integers

The provided code is a simple implementation of a function that sums two integers. Let's break down the components step by step:

Components of the Code

1. Class Definition:

   class Solution {

   This line defines a class named Solution. In the context of LeetCode problems, it is common to encapsulate solution logic within a class.

2. Public Access Specifier:

   public:

   This line starts the public section of the class, meaning that any member functions or variables declared after this will be accessible from outside the class.

3. Function Definition:

   int sum(int num1, int num2) {

   Here, a member function called sum is defined, which takes two integer parameters (num1 and num2). The function's return type is int, indicating that it will return an integer value.

4. Return Statement:

   return num1 + num2;

   This line executes the core logic of the function: it computes the sum of num1 and num2 and returns the result.

5. Closing Braces:

   }
   };

   These lines close the sum function and the Solution class, respectively.

Purpose of the Code

The sum function takes in two integers and returns their sum. It is a straightforward implementation typically used as an introductory problem on LeetCode, allowing users to practice basic function creation and understand how to work with classes in C++.

Example Usage

Here’s how the sum function could be called:

Solution sol;
int result = sol.sum(3, 4); // result will hold the value 7

In this case, sol is an instance of the Solution class. We call the sum method on this instance, passing 3 and 4 as arguments. The method computes 3 + 4 and returns 7, which is then stored in the result variable.

Conclusion

The solution is efficient and utilizes basic programming constructs in C++. It serves as a starting point for solving more complex problems on LeetCode by reinforcing understanding of functions, classes, and basic arithmetic.