Uses of References in C language

A significant difference between C and C++ (other than Factors and Classes!) is sources. 
Referrals are like a const suggestion to a varying. Giving a referrals is a bit like using a suggestion but with & not * and you don't need to dereference. The change is that you determine a deal with to a suggestion but a varying to a referrals varying. 
The range below indicates that the value of a is ripped into aref. But it is not, instead aref is a referrals to the varying a. Once allocated, aref is the same as a. Any changes to aref are changes to a as example 8_1 reveals. 
 int & aref = a; 

 //ex8_1
 #include <stdio.h>
 #include "stdafx.h"

 int main()
 {
  int a=9;
  int & aref = a;
  a++;
 cout << "The value of a is %i\n" << aref;
  return 0;
 }

Things you should always keep in mind about sources. 
A referrals must always consult something. NULLs are prohibited. 
A referrals must be initialized when it is designed. An unassigned referrals cannot are available. 
Once initialized, it cannot be modified to another varying. 

point of references:
For value like this not much. But in features, sources allow principles to be approved by referrals. In C, the big issue was that factors to features were ripped in. To modify a varying described exterior to the function necessary suggestions which created development more complex.
Definition of pass By Reference

Definition: In C and C++, factors to a function are approved by value. This creates a duplicate of the varying and can be quite slowly and ineffective if the varying is huge like a range. 
Pass by Reference moves in referrals to a varying - this is successfully the deal with of the varying into the function. This is significantly more effective than by value and allows the function  to modify the varying straight, something only possible in C by moving in a suggestion to the varying.
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