Program using with pointers to structure
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  • What you'll learn
  • ✓How can we use pointers to structures explain with an example?
    ✓How is structure different from pointer in C++?
    ✓What is the structure pointer reference?
    ✓What is the address of a struct in C++?
    ✓How to declare a pointer to a struct?
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  • To access members of a structure using pointers, we use the -> operator. In this example, the address of person1 is stored in the personPtr pointer using personPtr = &person1; . Now, you can access the members of person1 using the personPtr pointer.
  • Structure: Copies all member data when assigned or passed as a function argument. Pointer: Only copies the memory address, not the actual data it points to
  • The structure pointer points to the address of a memory block where the Structure is being stored. Like a pointer that tells the address of another variable of any data type (int, char, float) in memory.
  • The address of a struct is the same as the address of its first member variable. struct myStruct{ int number; char ch; }; int main() { myStruct mystruct = {8, 'a' }; cout << &mystruct << endl; cout << &(mystruct. number) << endl; This prints out the same address.
  • To declare a structure pointer struct keyword is used followed by the structure name and pointer name with an asterisk * symbol. Members of a structure can be accessed from pointers using two ways that are. Using dot and asterisk operator on a pointer.
  • The file pointer is actually a structure that stores the file data such as the file name, its location, mode, and the current position in the file. It is used in almost all the file operations in C such as opening, closing, reading, writing, etc.
  • Here, the address of variable d is stored in the pointer variable ptr , which means ptr is pointing to variable d . Distance* ptr = &d; Then, the member function of variable d is accessed using the pointer. cin >> (*ptr).
  • It is essentially a variable that stores the memory address of another variable or data structure rather than storing the data itself. Pointers are commonly used in programming languages that support direct memory manipulation, such as C and C++
  • A structure pointer is defined as the pointer which points to the address of the memory block that stores a structure known as the structure pointer. Complex data structures like Linked lists, trees, graphs, etc. are created with the help of structure pointers.
  • You begin a structure declaration with the Structure Statement, and you end it with the End Structure statement. Between these two statements you must declare at least one element. The elements can be of any data type, but at least one must be either a nonshared variable or a nonshared, noncustom event.

Requirement

The structure pointer points to the address of a memory block where the Structure is being stored. Like a pointer that tells the address of another variable of any data type (int, char, float) in memory.

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