Check out example codes for "c++ tutorial". It will help you in understanding the concepts better.

Code Example 1

C++ is a general-purpose programming language created by Bjarne 
Stroustrup as an extension of the C programming language, or 
"C with Classes".

//as you can also see to your right ---------------------->

C++ still qualifies as a high-level languge, yet the rise of 
languages like Ruby and Java have given capabilities that sway
people's opinion towards what is and is not "high-level". 

Yet high-level simply means it's farther from machine code and closer 
to human-readable form. Hence the need for a compliler/interpreter.

So don't get too worked up about granular specifics.

Code Example 2

#include <iostream>
using namespace std;

int main() {
  cout << "Hello World!";
  return 0;
}

Code Example 3

int x (0);

Code Example 4

Application of c++ in youtube program

Code Example 5

C++ is a high-level, general-purpose programming language.

//totally not right there ----------------------------------->

Code Example 6

#include <iostream>
using namespace std;
 
// function declaration
int max(int num1, int num2);
 
int main () {
   // local variable declaration:
   int a = 100;
   int b = 200;
   int ret;
 
   // calling a function to get max value.
   ret = max(a, b);
   cout << "Max value is : " << ret << endl;
 
   return 0;
}
 
// function returning the max between two numbers
int max(int num1, int num2) {
   // local variable declaration
   int result;
 
   if (num1 > num2)
      result = num1;
   else
      result = num2;
 
   return result; 
}

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