exam1.cpp

C++语言程序设计题典

#include <iostream.h>
#include <fstream.h>
void main()
{
	char ch;
	fstream out("abc.txt",ios::in|ios::out);
	out << "abcdefg";
	out.seekp(0);
	out.get(ch);
	while (ch!=EOF)
	{
		cout << ch;
		out.get(ch);
	}
	cout << endl;
}