Calculation based on pointer
#include <iostream>
using namespace std;
int main()
{
int *p, num;
p = #
*p = 100;
cout << num << " ";
(*p)++;
cout << num << " ";
(*p)--;
cout << num << "\n";
return 0;
}100 101 100
Get address of an int variable
#include <iostream>
using namespace std;
int main()
{
int total;
int *ptr;
int val;
total = 3200; // assign 3,200 to total
ptr = &total; // get address of total
val = *ptr; // get value at that addres
cout << "Total is: " << val << "\n";
return 0;
}Total is: 3200
Using int pointers
#include <iostream>
using std::cout; // this file uses std::cout
int main()
{
int intValue; // a variable
int * intPointer = 0; // a pointer
intValue = 5;
intPointer = &intValue; // assign address of intValue to intPointer
cout << "intValue: " << intValue << "\n";
cout << "*intPointer: " << *intPointer << "\n\n";
cout << "*intPointer = 7\n";
*intPointer = 7; // sets intValue to 7
cout << "*intPointer: " << *intPointer << "\n";
cout << "intValue: " << intValue << "\n\n";
cout << "intValue = 9\n";
intValue = 9;
cout << "intValue: " << intValue << "\n";
cout << "*intPointer: " << *intPointer << "\n";
return 0;
}intValue: 5
*intPointer: 5
*intPointer = 7
*intPointer: 7
intValue: 7
intValue = 9
intValue: 9
*intPointer: 9
