#include &lt;iostream&gt;    #include &lt;sstream&gt;    using namespace std;    int main&#40;&#41;    &#123;        stringstream mys&#40;ios :: in | ios :: out&#41;;        std :: string dat&#40;&quot;The double value is : 74.79 .&quot;&#41;;        mys.str&#40;dat&#41;;        mys.seekg&#40;-7, ios :: end&#41;;        double val;        mys &gt;&gt; val;        val = val*val;        mys.seekp&#40;-7,ios::end&#41;;        mys &lt;&lt; val;        std :: string new_val = mys.str&#40;&#41;;        cout &lt;&lt; new_val;        return 0;    &#125;
A. 5593.54
B. Error
C. Runtime error
D. None of the mentioned
Answer:A
#include &lt;iostream&gt;    #include &lt;sstream&gt;    using namespace std;    int main&#40;&#41;    &#123;        stringstream mys&#40;ios :: in | ios :: out&#41;;        std :: string dat&#40;&quot;The double value is : 74.79 .&quot;&#41;;        mys.str&#40;dat&#41;;        mys.seekg&#40;-7, ios :: end&#41;;        double val;        mys &gt;&gt; val;        val = val*val;        mys.seekp&#40;-7,ios::end&#41;;        mys &lt;&lt; val;        std :: string new_val = mys.str&#40;&#41;;        cout &lt;&lt; new_val;        return 0;    &#125;
A. 5593.54 B. Error C. Runtime error D. None of the mentioned