Differences

This shows you the differences between two versions of the page.

--- notes:cprog:spring2024:projects:cppx [2024/04/17 03:05] – [Member Functions] hcopp1
+++ notes:cprog:spring2024:projects:cppx [2024/04/24 12:23] (current) – [Classes] amelvil2
@@ Line 1: / Line 1: @@
 ======CPPX======
 =====C++ compiler=====
+To compile a C++ script, you can use g++ -o (new name) (uncompiled name).cpp
+For example, to compile a script called script.cpp:
+<code>g++ -o script script.cpp</code>
 ====common file extensions====
@@ Line 25: / Line 29: @@
   * The public members form an interface to the class and are accessible outside the class.
+For example:
+<code>
+// Define the class
+class MyClass {
+    // Class members go here
+};
+</code>
 ====Member Functions====
@@ Line 114: / Line 126: @@
 A destructor is a member function that is invoked automatically when the object goes out of scope or is explicitly destroyed by a call to ''delete'' or ''delete[]''. A destructor has the same name as the class and is preceded by a ''~''. Example:....
   * the destructor for class __String__ is declared: __~String()__
+<code>
+class String
+{
+    public:
+        String(const char* ch);  // Declare the constructor
+        ~String();               // Declare the destructor
+    private:
+        char* _text{nullptr};
+};
+// Define the destructor.
+String::~String()
+{
+    // Deallocate the memory that was previously reserved for the string.
+    delete[] _text;
+}
+</code>
 ====Member Data====
+A data member in C++ is a non-function member of a class (class, struct, or union).
+<code>
+class C {
+    // In C++, this is a "data member".
+    int x;
+};
+</code>
 ====Access Control====
+Access controls enable you to separate the ''public'' interface of a class from the ''private'' implementation details and the ''protected'' members that are only for use by derived classes.
+Access control helps prevent you from using objects in ways they weren't intended to be used. This protection is lost when you make explicit type conversions.
 ===Public===
+Class members declared as ''public'' can be used by any function.
+For example:
+<code>
+class MyClass {
+public:
+    int publicMember;
+};
+</code>
 ===Private===
+Class members declared as ''private'' can be used only by member functions and friends (classes or functions) of the class.
+For example:
+<code>
+class MyClass {
+private:
+    int privateMember;
+};
+</code>
 ===Protected===
+Class members declared as ''protected'' can be used by member functions and friends (classes or functions) of the class. Additionally, they can be used by classes derived from the class.
+For example:
+<code>
+class MyClass {
+protected:
+    int protectedMember;
+};
+</code>
 =====Objects=====
+In C++, an object is created from a class.
+<code>
+class CLASSNAME {
+   Public:
+      int sumthinNumb;
+}
+/////////////////////////
+int main()
+{
+   CLASSNAME objname;
+   objname.sumthinNumb = 12834589028390458;
+   cout << objname.sumthinNUmb << "/n";
+   return 0;
+}
+}
+</code>