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++ 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++ program to Demonstrate Pointer to Structure
#include <iostream>
#include <stdio.h>
using namespace std;
// Structure declaration for
// vertices
struct GFG {
int x;
int y;
};
// Structure declaration for
// Square
struct 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 Square
void 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 Code
int main()
{
// Initialize variable 's'
// with vertices of Square
struct square s = { { 4, 4 }, { 4, 4 } };
// Function Call
area_Square(s);
return 0;
}
Output
16
