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The Scope Resolution Operator( :: )
Global variables are explained outside any functions and thus can be used by all the functions defined thereafter. However, if a global variable is declared with the similar name as that of a local variable of a function , the local variable is the one in the scope when the program implements that function . The C++ language provides the scope resolution operator ( :: ) to access the global variable thus overriding a local variable with the similar name. This operator is prefixed to the name of the global variable . The following example shows its usage.
int global = 10;
void main()
{
int global = 20;
printf(" Just writing global prints : %d\n", global);
printf(" Writing ::global prints : %d\n", ::global);
}
The output of this program will be:
Just writing global prints : 20
Writing ::global prints : 10
Reference Oddities A reference variable can demote to any integer variable, be it in an array or a member variable from structure or class. Reference variables can demote to co
how to create?
Asks the user for an integer. if the number is less than 21, ask them for a number again; repeat this until you get a number bigger than 20. 20 is not an acceptable number. Once yo
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Friend Functions One of the major features of OOP is information hiding. A class encapsulates data and methods to operate on that data in a single unit. The data from the class
A: They are following: Const: point out that memory once initialized, must not be modify through a program. Volatile: denote that value in the memory location can be modified
Program is to store first n natural no in a file: Write a program to store first n natural no in a file void main() { fstream file; file.open("studen
How to compute the Cost of GCD algorithm?
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