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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
program
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A palindrome is a string that reads the same from both the ends. Given a string S convert it to a palindrome by doing character replacement. Your task is to convert S to palindrome
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#questio#A Padovan string P(n) for a natural number n is defined as: P(0) = ‘X’ P(1) = ‘Y’ P(2) = ‘Z’ P(n) = P(n-2) + P(n-3), n>2 where + denotes string concate
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The default Constructor and Destructor If you fail to write a constructor and destructor function, the compiler automatically supplies them for you. These functions have publi
Q: But operator overloading makes class look ugly; isn't it assumed to make my code clearer? A: Operator overloading makes life simpler for the users of a class, not for develop
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