chore: add resource link to cpp >> introduction:what-is-cpp

src/data/roadmaps/cpp/content/100-introduction/100-what-is-cpp.md

@@ -1,45 +1 @@
-#  What is C++?
-C++ is a general-purpose programming language created by Bjarne Stroustrup as an extension of the C programming language. It was first introduced in 1985 and provides object-oriented features like classes and inheritance. C++ is widely used in various applications like game development, system programming, embedded systems, and high-performance computing.
-
-C++ is a statically-typed language, meaning that the type of a variable is determined during compilation, and has an extensive library called the C++ Standard Library, which provides a rich set of functions, algorithms, and data structures for various tasks.
-
-C++ builds upon the features of C, and thus, most C programs can be compiled and run with a C++ compiler. 
-
-## Code Example
-
-Here's a simple example of a C++ program that demonstrates some essential features of the language:
-
-```cpp
-#include <iostream>
-
-// A simple function to add two numbers
-int add(int a, int b) {
-    return a + b;
-}
-
-class Calculator {
-public:
-    // A member function to multiply two numbers
-    int multiply(int a, int b) {
-        return a * b;
-    }
-};
-
-int main() {
-    int x = 5;
-    int y = 3;
-
-    // Using the standalone function 'add'
-    int sum = add(x, y);
-    std::cout << "Sum: " << sum << std::endl;
-
-    // Using a class and member function
-    Calculator calc;
-    int product = calc.multiply(x, y);
-    std::cout << "Product: " << product << std::endl;
-
-    return 0;
-}
-```
-
-In the above program, we define a simple function `add` and a class `Calculator` with a member function `multiply`. The `main` function demonstrates how to use these to perform basic arithmetic.
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