dsa-programs/Lecture25.cpp at main · Aadharbindal/dsa-programs · GitHub

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#include<iostream>
using namespace std;

int main () {

//pointer to int is created, and pointing to some garbage address
//int *p = 0;
//cout << *p << endl;

/*

int i = 5;
int *q = &i;
cout << q << endl;
cout << *q << endl;
int *p = 0;
p = &i;
cout << p << endl;
cout << *p << endl;

*/

int num = 5;
int a = num;

cout << "a before " << num << endl;
a++;
cout << "a after " << num << endl;

int *p  = &num;
cout << "before " << num << endl;
(*p)++;
cout << "after " << num << endl;

//copying a pointer

int *q = p;

cout << p <<" - " << q << endl;
cout << *p <<" - " << *q << endl;

//important concept

int i = 3;
int *t = &i;
//cout <<  (*t)++ << endl;

*t = *t +1;
cout << *t << endl;

cout << " before t " << t << endl;
t = t + 1;
cout << " after t " << t << endl;

return 0;
}