C++ – Pointer to Structure
Last Updated :
07 Oct, 2022
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Pointer to structure in C++ can also be referred to as Structure Pointer. A structure Pointer in C++ is defined as the pointer which points to the address of the memory block that stores a structure. Below is an example of the same:
Syntax:
struct name_of_structure *ptr; // Initialization of structure is done as shown below ptr = &structure_variable;
Example 1:
C++
// C++ program to demonstrate Pointer to Structure#include <iostream>using namespace std;struct point { int value;};int main(){ struct point g; // Initialization of the structure pointer struct point* ptr = &g; return 0;} |
In the above code g is an instance of struct point and ptr is the struct pointer because it is storing the address of struct point.
Example 2:
C++
// C++ program to Demonstrate Pointer to Structure#include <iostream>#include <stdio.h>using namespace std;// Structure declaration for// verticesstruct GFG { int x; int y;};// Structure declaration for// Squarestruct square { // An object left is declared // with 'GFG' struct GFG left; // An object right is declared // with 'GFG' struct GFG right;};// Function to calculate area of// the given Squarevoid area_Square(struct square s){ // Find the area of the Square // using variables of point // structure where variables of // point structure is accessed // by left and right objects int area = (s.right.x) * (s.left.x); // Print the area cout << area << endl;}// Driver Codeint main(){ // Initialize variable 's' // with vertices of Square struct square s = { { 4, 4 }, { 4, 4 } }; // Function Call area_Square(s); return 0;} |
Output
16
