第16周-阅读程序4（2）

#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;
}