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Question

What is the output of this program?
    #include <iostream>
    #include <sstream>
    using namespace std;
    int main()
    {
        stringstream mys(ios :: in | ios :: out);
        std :: string dat("The double value is : 74.79 .");
        mys.str(dat);
        mys.seekg(-7, ios :: end);
        double val;
        mys >> val;
        val = val*val;
        mys.seekp(-7,ios::end);
        mys << val;
        std :: string new_val = mys.str();
        cout << new_val;
        return 0;
    }

a.

f

b.

Error

c.

Runtime error

d.

None of the mentioned

Answer: 5593.54

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Q. What is the output of this program?