Merge pull request #4846 from shalala66/patch-1

Update destructors-cpp.md

Author: Jak-MS

docs/cpp/destructors-cpp.md

@@ -14,38 +14,42 @@ Consider the following declaration of a `String` class:
 
 ```cpp
 // spec1_destructors.cpp
-#include <string>
-
-class String {
-public:
-   String( char *ch );  // Declare constructor
-   ~String();           //  and destructor.
-private:
-   char    *_text;
-   size_t  sizeOfText;
+#include <string> // strlen()
+
+class String
+{
+    public:
+        String(const char* ch);  // Declare the constructor
+        ~String();               // Declare the destructor
+    private:
+        char* _text{nullptr};
 };
 
-// Define the constructor.
-String::String( char *ch ) {
-   sizeOfText = strlen( ch ) + 1;
+// Define the constructor
+String::String(const char* ch)
+{
+    size_t sizeOfText = strlen(ch) + 1; // +1 to account for trailing NULL
 
-   // Dynamically allocate the correct amount of memory.
-   _text = new char[ sizeOfText ];
+    // Dynamically allocate the correct amount of memory.
+    _text = new char[sizeOfText];
 
-   // If the allocation succeeds, copy the initialization string.
-   if( _text )
-      strcpy_s( _text, sizeOfText, ch );
+    // If the allocation succeeds, copy the initialization string.
+    if (_text)
+    {
+        strcpy_s(_text, sizeOfText, ch);
+    }
 }
 
 // Define the destructor.
-String::~String() {
-   // Deallocate the memory that was previously reserved
-   //  for this string.
-   delete[] _text;
+String::~String()
+{
+    // Deallocate the memory that was previously reserved for the string.
+    delete[] _text;
 }
 
-int main() {
-   String str("The piper in the glen...");
+int main()
+{
+    String str("We love C++");
 }
 ```