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--- cplusplus:c_vs._c [2016/04/21 23:09] – [Dynamic memory] mithat
+++ cplusplus:c_vs._c [2016/04/21 23:35] – [Structs] mithat
@@ Line 76: / Line 76: @@
   * Best practice to use them anyway.
-===== Named constants (macros) =====
+===== Named constants and macros =====
   * ''const'' is available only in newer versions of C.
-  * ''#define'' precompiler directive typically used instead of ''const''.
+  * ''#define'' precompiler directive typically used instead.<code c>
-  * ''#define'' can also be used to create macros.
-<code c>
 #define PI 3.1415
 #define TAX_RATE 0.065
+</code>
+  * ''#define'' can also be used to create macros.<code c>
 #define square(x) ((x) * (x))
 </code>
-===== Dynamic memory =====
+===== Dynamic memory is different =====
-  * Allocating/deallocating dynamic memory is different.
+  * Allocating memory:<code c>
-<code c>
+int *x = malloc(sizeof(int));          /* allocate a single int */
-int *x = malloc(sizeof(int));            /* allocate a single int */
+int *xArry = malloc(sizeof(int) * 10); /* allocate array of ints */
-int *x_array = malloc(sizeof(int) * 10); /* allocate array of 10 ints */
-/* release storage that was allocated */
-free( x );
-free( x_array );
 </code>
+  * Deallocating memory:<code c>
+free(x);
+free(xArry);
+</code>
 ===== Structs =====
-  * Need to use ''struct'' keyword when defining ''struct'' variables
+  * You must use the ''struct'' keyword when defining ''struct'' variables.<code c>
-<code c>
 struct MyStruct
 {