#include
using namespace std;
void sqrval(const int &val)
{
const_cast (val) = val * val;
}
int main()
{
int x = 10;
cout << "x before call: " << x << endl;
sqrval(x);
cout << "x after call: " << x << endl;
return 0;
}
x before call: 10
x after call: 100