//****************************************
//const_cast remove cast or volatile 
//attribute from variables
//worning removing attribute const could make
//mistake in program idea 
//****************************************

#include <iostream>
using namespace std;


//----------------------------------------
int editVal(const int *val){
	int *p;
	p=const_cast<int*>(val);
	*p=*val*2;
}

//===========================================
int main(){
	int val=10;
	cout<<"val before edit:... "<<val<<endl;
	editVal(&val);
	cout<<"val after edit:... "<<val<<endl;
	return 0;
}