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returning a c_str() not working.

wtf (670)
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char *strswap(const string & s)
{
    const char * temp = new (nothrow) char[s.size()];
    temp = s.c_str();
    char * rv = new (nothrow) char [s.size()];
    int i;
    for (i = 0; i < s.size(); ++i)
        rv[i] = temp[i];
    rv[i] = 0;
    return rv;
}

(also, where should I delete temp and rv?)

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string str; char ch; char * chp; char charray[16];

int main()
{
     chp = new (nothrow) char [16]; 
     getline(cin, str);
     chp = swap(str);
     cout << "chp = " << chp << endl;
     return 789;
}


It compiles and runs I get:
chp =
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