Latest ads
-
ZTE MF283U 4G Unlocked Router (Used)
- ayanthamaxi
- Updated:
-
ලංකාවේ හොඳම උපකාරක පන්ති සහ ගුරුවරුන් එකම තැනකින් - TopTuition.lk- dulithapathum
- Updated:
-
Colombo RidhMathraa ’26 🎶✨- Tmadhusanka
- Updated:
-
Colombo PXN V10 Pro Direct Drive Racing Wheel (Under Warranty)
- Abdur Rahman
- Updated:
-
USDT ණය සේවාව - USDT Loan Service
- පුරවැසියා
- Updated:
c++ වල pass by value සහ pass by reference
- Thread starter Sea1men
- Start date
Value : කියන්නෙහ් උබ පාස් කරන්නහ් ඔනි එකට වෙරියබල් එකක් දැම්මොත් පාස් වෙන්නෙහ් එ වෙරියබල් එකේ තියෙනහ් වැලිව් එක විතරයි
Reference: දැම්මොත් උබ පාස් කරන්නහ් ඔනි තැනට දාන වෙරියබල් එක තමා පාස් වෙන්නෙහ් උබට එ වෙරියබල් එකෙ වැලිව් එක චෙන්ජ් කරන්නහ් පුලුවන් එ ෆන්ශන් එක තෘ
Reference: දැම්මොත් උබ පාස් කරන්නහ් ඔනි තැනට දාන වෙරියබල් එක තමා පාස් වෙන්නෙහ් උබට එ වෙරියබල් එකෙ වැලිව් එක චෙන්ජ් කරන්නහ් පුලුවන් එ ෆන්ශන් එක තෘ
If I tell you the URL, I'm passing by reference. You can use that URL to see the same web page I can see. If that page is changed, we both see the changes. If you delete the URL, all you're doing is destroying your reference to that page - you're not deleting the actual page itself.
If I print out the page and give you the printout, I'm passing by value. Your page is a disconnected copy of the original. You won't see any subsequent changes, and any changes that you make (e.g. scribbling on your printout) will not show up on the original page. If you destroy the printout, you have actually destroyed your copy of the object - but the original web page remains intact.
If I print out the page and give you the printout, I'm passing by value. Your page is a disconnected copy of the original. You won't see any subsequent changes, and any changes that you make (e.g. scribbling on your printout) will not show up on the original page. If you destroy the printout, you have actually destroyed your copy of the object - but the original web page remains intact.
If I tell you the URL, I'm passing by reference. You can use that URL to see the same web page I can see. If that page is changed, we both see the changes. If you delete the URL, all you're doing is destroying your reference to that page - you're not deleting the actual page itself.
If I print out the page and give you the printout, I'm passing by value. Your page is a disconnected copy of the original. You won't see any subsequent changes, and any changes that you make (e.g. scribbling on your printout) will not show up on the original page. If you destroy the printout, you have actually destroyed your copy of the object - but the original web page remains intact.
බොහොම ස්තුතියි. ගොඩක් පින් 
c++ වල pass by value සහ pass by reference වල වෙනස පොඩ්ඩක් පැහැදිලි කරලා දෙන්නකෝ....
variable ekata assign karana value eka pass karannath puluwan...naththan variable eka thiyena memory location adress eka pass karannath puluwan...
In C++ you can use both pass by value and pass by reference.In C++There are two types of pass by reference.1)Pass by pointers
2)Pass by reference
pointer types store the address of particular type. Reference is just another name for that type .Once you assign a value to reference , you can not reassign it.Unlike references you can reassign values to pointers.
int a = 12;
int *b = &a; //this is a integer type pointer that stores the address of a
int &c =a; //this integer type reference
i think previous answers tell difference between pass by value and pass by reference.In pass by value , you pass an exact copy of values.Performance wise this is not good.In pass by reference ,you do not pass copy values or objects, just pass address or reference .
int myFuntion(int a,int b); //funtion prototype
Pass by value
int x=2;
int y =3;
myFuntion(x,y);
pass by reference using pointers
int x=2;
int y =3;
int myFuntion(int *a, int *b);
myFuntion(&x,&y);
Pass by reference by references
int myFuntion(int &a, int &b);
int x=2;
int y =3;
myFuntion(x,y);
There is an another use for pass by reference is that you can modify original variables .In pass by value you can not do this.
void swap (int& first, int& second)
{
int temp = first;
first = second;
second = temp;
}
int a = 2;
int b = 3;
swap( a, b );
Some times you do not need to modify originals .Just pass as const references or pointers
myFuntion(const int &z);
Diffidence between pass by pointers vs Pass by references
pointers are more prone to bugs. so if possible use references .Use pointers when needed.
reference can not take null values directly. when your function need to take null values use pointers.
Other than this , pass by references is a good way of returning multiple values .Normally a function can return a single value.But using pass by references you can return more than one values.
2)Pass by reference
pointer types store the address of particular type. Reference is just another name for that type .Once you assign a value to reference , you can not reassign it.Unlike references you can reassign values to pointers.
int a = 12;
int *b = &a; //this is a integer type pointer that stores the address of a
int &c =a; //this integer type reference
i think previous answers tell difference between pass by value and pass by reference.In pass by value , you pass an exact copy of values.Performance wise this is not good.In pass by reference ,you do not pass copy values or objects, just pass address or reference .
int myFuntion(int a,int b); //funtion prototype
Pass by value
int x=2;
int y =3;
myFuntion(x,y);
pass by reference using pointers
int x=2;
int y =3;
int myFuntion(int *a, int *b);
myFuntion(&x,&y);
Pass by reference by references
int myFuntion(int &a, int &b);
int x=2;
int y =3;
myFuntion(x,y);
There is an another use for pass by reference is that you can modify original variables .In pass by value you can not do this.
void swap (int& first, int& second)
{
int temp = first;
first = second;
second = temp;
}
int a = 2;
int b = 3;
swap( a, b );
Some times you do not need to modify originals .Just pass as const references or pointers
myFuntion(const int &z);
Diffidence between pass by pointers vs Pass by references
pointers are more prone to bugs. so if possible use references .Use pointers when needed.
reference can not take null values directly. when your function need to take null values use pointers.
Other than this , pass by references is a good way of returning multiple values .Normally a function can return a single value.But using pass by references you can return more than one values.
Last edited:
precisely
Pass by value kiwwama original eke copy ekak thama pass wenne. Pass by reference kiwwama original eke memory location ekata reference ekak thama pass wenne.
Subscribed for entertainment purposes
precisely
Pass by value kiwwama original eke copy ekak thama pass wenne. Pass by reference kiwwama original eke memory location ekata reference ekak thama pass wenne.
thanx all 
Similar threads
