added answer files for C++ Arrays exercises

Author: alexoah

W3School-CPPExercises/CPP-Arrays/cppArraysE1.cpp

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+/**
+ *	from C++ Arrays: Exercise 1 ( https://www.w3schools.com/cpp/exercise.asp?filename=exercise_arrays1 )
+ *
+ *	question:
+ *	Create an array of type string called cars.
+ *
+ *	______ ____[4] = {"Volvo", "BMW", "Ford", "Mazda"};
+ *
+ */
+string cars[4] = {"Volvo", "BMW", "Ford", "Mazda"};

W3School-CPPExercises/CPP-Arrays/cppArraysE2.cpp

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+/**
+ *	from C++ Arrays: Exercise 2 ( https://www.w3schools.com/cpp/exercise.asp?filename=exercise_arrays2 )
+ *
+ *	question:
+ *	Print the value of the second element in the cars array.
+ *
+ *	______ ____[4] = {"Volvo", "BMW", "Ford", "Mazda"};
+ *	cout << _______;
+ *
+ */
+string cars[4] = {"Volvo", "BMW", "Ford", "Mazda"};
+cout << cars[1];

W3School-CPPExercises/CPP-Arrays/cppArraysE3.cpp

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+/**
+ *	from C++ Arrays: Exercise 3 ( https://www.w3schools.com/cpp/exercise.asp?filename=exercise_arrays3 )
+ *
+ *	question:
+ *	Change the value from "Volvo" to "Opel", in the cars array.
+ *
+ *	string cars[4] = {"Volvo", "BMW", "Ford", "Mazda"};
+ *	_______ = ______;
+ *	cout << cars[0];
+ *
+ */
+string cars[4] = {"Volvo", "BMW", "Ford", "Mazda"};
+cars[0] = "Opel";
+cout << cars[0];

W3School-CPPExercises/CPP-Arrays/cppArraysE4.cpp

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+/**
+ *	from C++ Arrays: Exercise 4 ( https://www.w3schools.com/cpp/exercise.asp?filename=exercise_arrays4 )
+ *
+ *	question:
+ *	Loop through the elements in the cars array.
+ *
+ *	string cars[4] = {"Volvo", "BMW", "Ford", "Mazda"};
+ *	___ (_____ = 0; _ < 4; ___) {
+ *		cout << _______ << "\n";
+ *	}
+ *
+ */
+string cars[4] = {"Volvo", "BMW", "Ford", "Mazda"};
+for (int i = 0; i < 4; i++) {
+	cout << cars[i] << "\n";
+}