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What is the difference between reference type and pointers.
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Answer Posted / snigdhadeb
REFERENCE:-
#include<iostream.h>
int main()
{
int a=3;
/*A reference variable must be initialized at the time
of it's declaration*/
int &ra=a;
int y=6;
/*int &ry;
ry=y; // not allowed */
int &ry=y;
/* It should be noted that a reference variable dose not
creat a copy so it dose not takes any additional memory
space. Thus memory space is conserved*/
/* It has notational clearness*/
int z=ra * ry;
/* To access the value of a variable thought it's
reference no additional symbol is required, i.e.
dereference is not required*/
return 0;
}
POINTER:-
include<iostream.h>
int main()
{
int a=3;
/* A pointer variable may be declared without
initialization*/
int *pt;
/* A pointer variable may be intialized later on*/
pa=&a;
/* Also a pointer variable may be intialized at the time
of int's declaration*/
int b=5;
int *pb=&b;
/* It is also observed that each pointer variable
required it's own storage, so memory is not conserved*/
/* it's dose not have notational clearness*/
int c=*pa * *pb;
/* Access the value of a variable through it's pointer
requires value at (*) symbol, i.e. dereference is required*/
return 0;
}
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