What follows is a slightly weird little C++ program. See if you can make out why it behaves the way it does.
The Program
#include <iostream>
using namespace std;
void main()
{
const int c = 10;
int *p = (int *)&c;
cout<<" p = "<<p<<endl;
cout<<" &c = "<<&c<<endl<<endl;
cout<<"Before assignment\n\n";
cout<<" c = "<<c<<endl;
cout<<" *p = "<<*p<<endl<<endl;
*p = 20; //assigning to a const object?!
cout<<"After assignment\n\n";
cout<<" c = "<<c<<endl;
cout<<" *p = "<<*p<<endl;
}
The Ouput
p = 006AFDF4 &c = 006AFDF4 Before assignment c = 10 *p = 10 After assignment c = 10 *p = 20
As is evident from the output, the pointer 'p' does in fact point to the location of 'c' in memory but quite strangely we are able to assign a value to that location and yet subsequent usage of the constant do not seem to be affected! If you are completely confused please click here.
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