Can anyone explain this program in detail

Question

#include <iostream>
using namespace std;

int main()
{
   const int SIZE=4;
   char Sentence[SIZE];
   char Sentence2[SIZE];

   cout << "Enter the sentence" <<endl;
   cin >> Sentence;

   cout << "\nThe string read with cin was"
 << endl <<Sentence <<endl;
  char ch = cin.get();

  cout << "Enter the second sentence: "<<endl;
  cin.get(Sentence2,SIZE,'$');
  cout << Sentence2 <<endl;
}

OUTPUT

Enter the sentence
This is my first sentence

The string read with cin was
This
Enter the second sentence:
is

I have just started learning C++ and I am not able to understand this program as well as it's output. Pls can anyone suggest me where to learn it from or explain it in detail.

Answer 1

cout << "Enter the second sentence: "<<endl;

Prints Enter the second sentence: to the console.

cin.get(Sentence2,SIZE,'$');

Reads up to SIZE - 1 number of characters, or until the first $ character from console to Sentence2 array (including space characters. 1 character reserved for the zero terminator).

cout << Sentence2 <<endl;

Prints Sentence2 variable to console.