const_cast doesn't work c++? [duplicate]

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Two different values at the same memory address (6 answers)

Closed 2 years ago.

I have the following code :

const int k=1;
    int *p=const_cast<int *>( &k);
    cout<<"k before="<<*p<<endl;
    *p=10;
    *const_cast<int *>( &k)=12;
    cout<<"k after="<<k<<endl;

the output was :

k before=1
k after=1

why doesn't const cast work here ?