C++ Pointers-Concept Explained
@deepika-jf1ysv
•
Oct 21, 2024
Oct 21, 2024
1.1K
C++ pointer or simply a pointer is a simple variable that has the capability to store the memory address of some location.<BR><BR>Lets discuss a small program for illustration:<BR>
[*]Here p is a pointer variable and q is a simple interger variable.
[*]& is the address operator. So when we've the statement p=&q, we are actually initializing p with the memory address of q.
[*]As memory addresses are generally of hexadecimal type, so p now also has some hexadecimal value.
[*]p as such has no data type. But int *p means that the data type of the contents of memory location referenced by p (i.e. q) is interger.
[*]So p is also called pointer to integer.
[*]Displaying p will display the memory address of the variable q.
[*]*p displays the content of the memory location it refers to i.e. value of q.</UL>
<BR>int * p;<BR>int q=10;<BR>p=&q;<BR>cout<<"Address of q is: "<<p<<endl;<BR>cout<<"Value of q is: "<<*p<<endl;<BR><UL>
[*]Here p is a pointer variable and q is a simple interger variable.
[*]& is the address operator. So when we've the statement p=&q, we are actually initializing p with the memory address of q.
[*]As memory addresses are generally of hexadecimal type, so p now also has some hexadecimal value.
[*]p as such has no data type. But int *p means that the data type of the contents of memory location referenced by p (i.e. q) is interger.
[*]So p is also called pointer to integer.
[*]Displaying p will display the memory address of the variable q.
[*]*p displays the content of the memory location it refers to i.e. value of q.</UL>