elaborated on ptr to structs and typedef usage (#30511)

guide/english/c/structures/index.md

@@ -19,7 +19,7 @@ struct StudentRecord
   char Phone[10];
 };
 ```
-* We can also define a **structure** using **typedef** which makes initializing a structure later in our program easier.
+* We can also define a **structure** using **typedef** which makes initializing a structure later in our program easier. Note that using typedef requires naming the structure, in the example below **struct StudentRecord** was given the name **Record**.
 ```C
 typedef struct StudentRecord
 {
@@ -36,7 +36,8 @@ int main(void)
   struct StudentRecord student1;
 }
 ```
-And using **typedef**, the user-defined data-type looks like:
+the keyword struct must always precede **StudentRecord**, as it was not defined as a type.
+Using **typedef**, only the given name is sufficient to declare a type, so the user-defined data-type looks like:
 ```C
 int main(void)
 {
@@ -59,5 +60,29 @@ int main(void)
   printf("Name: %s \n, Class: %d \n, Address: %s \n, Phone: %s \n",student1.Name, student1.Class, student1.Address, student1.Phone);
 }
 ```
+We can also dynamically allocate memory for a struct, as follows:
+```C
+Record *student1Ptr = (Record *)malloc(sizeof(Record));
+//always check for null after malloc
+```
+This will make malloc calculate the size of all the elements in the struct and allocate the appropriate amount of memory accordingly. To access members of a struct's pointer we use an arrow `->`
+```C
+int main(void)
+{
+  Record *student1Ptr = (Record *)malloc(sizeof(Record));
+  //check for null
+  student1Ptr->Class = 10;
+  printf("Enter Name of Student\n");
+  scanf("%s",student1Ptr->Name);
+  printf("Enter Address of Student\n");
+  scanf("%s",student1Ptr->Address);
+  printf("Enter Phone Number of Student\n");
+  scanf("%s",student1Ptr->Phone);
+  // Printing the Data
+  printf("Name: %s \n, Class: %d \n, Address: %s \n, Phone: %s \n",student1->Name, student1->Class, student1->Address, student1->Phone);
+  free(student1Ptr);
+}
+```
+
 ### More Information  
 https://www.tutorialspoint.com/cprogramming/c_structures.htm