What is the output of this C++ program in the "test.txt" file?

#include <fstream>
using namespace std;
int main ()
{
    long pos;
    ofstream outfile;
    outfile.open ("test.txt");
    outfile.write ("This is an apple",16);
    pos = outfile.tellp();
    outfile.seekp (pos - 7);
    outfile.write (" sam", 4);
    outfile.close();
    return 0;
}