Pointer in C++:
A pointer is a variable whose value will be another variable’s address. Generally, a pointer variable is declared as follows:
type *var-name;
Here, type is the pointer’s base type and var-name is the pointer variable name. The asterisk is used to designate a variable as a pointer.
Given Program:
//Include libraries
#include <iostream>
//Use namespace
using namespace std;
//Define main method
int main()
{
// Declare pointer variables
int *p1, *p2;
//Assign value
p1 = new int;
//Assign value
p2 = new int;
//Assign value
*p1 = 10;
//Assign value
*p2 = 20;
//Display value
cout << *p1 << " " << *p2 << endl;
//Assign value
p1 = p2;
//Display value
cout << *p1 << " " << *p2 << endl;
//Assign value
*p1 = 30;
//Display value
cout << *p1 << " " << *p2 << endl;
//Pause console window
system("pause");
//Return 0 value
return 0;
}
Pointer in C++:
A pointer is a variable whose value will be another variable’s address. Generally, a pointer variable is declared as follows:
type *var-name;
Here, type is the pointer’s base type and var-name is the pointer variable name. The asterisk is used to designate a variable as a pointer.
Given Program:
//Include libraries
#include <iostream>
//Use namespace
using namespace std;
//Define main method
int main()
{
// Declare pointer variables
int *p1, *p2;
//Assign value
p1 = new int;
//Assign value
p2 = new int;
//Assign value
*p1 = 10;
//Assign value
*p2 = 20;
//Display value
cout << *p1 << " " << *p2 << endl;
//Assign value
p1 = p2;
//Display value
cout << *p1 << " " << *p2 << endl;
//Assign value
*p2 = 30;
//Display value
cout << *p1 << " " << *p2 << endl;
//Pause console window
system("pause");
//Return 0 value
return 0;
}
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Problem Solving with C++ (10th Edition)
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