Differences

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--- cplusplus:pointers_4_slides [2019/03/31 22:36] – mithat
+++ cplusplus:pointers_4_slides [2021/10/24 02:56] – [Memory management of dynamically allocated storage] mithat
@@ Line 16: / Line 16: @@
   * ''new <data-type>''
     * reserves a block of memory to hold the specified %%<data-type>%%
-    * returns the base address of that block:
+    * returns the base address of that block.
+    * optional parenthesis around ''<data-type>''
 <code cpp>
@@ Line 25: / Line 26: @@
 </code>
-  * ''foo'' points to a ''double'' that is not associated with a regular variable identifier.
+  * ''foo'' points to a ''double'' that isn't associated with a variable identifier.
 ===== Example =====
@@ Line 108: / Line 109: @@
 void ninetynine()
 {
-    int localVar = 99;
+    int localVar = 99;  // localVar is destroyed at end of fcn call
     cout << localVar << endl;
 }
@@ Line 138: / Line 139: @@
 void ninetynine()
 {
-    int *localPtr = new int;
+    int *localPtr = nullptr;  // localPtr is destroyed at end of fcn call
+    localPtr = new int;       // but not dynamically allocated storage
     *localPtr = 99;