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Write Program in C++ that explains the difference of postfix decrement operator and prefix decrement operator used as independent expression.

	 
                                 		
include < iostream.h >
include < conio.h >
void main()
{
int a,b,x,y;
a=b=x=y=0;
a--;
b=a;
--x
y=x;
cout<<"a="<<a<<endl<<"b="<<b<<endl;
cout<<"x="<<x<<endl<<"y="<<y<<endl;
getch();
}