Answer Posted / vikram

scope resolution operator(::) is used to define member
functions outside the class,that is we are defining the
member functions explicitly.
Scope resolution operator is also used to access the
globally declared variables.
for example,
#include<iostream.h>
int a=20;
main()
{
int a=10;
cout<<a<<endl<<::a;
}
here,the output will be:
10
20
thnx

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