12.13.cpp

这是C++的一部分练习程序!对初学者有一定的帮助作用。

#include <iostream.h>
#include <fstream.h>
#include <stdlib.h>
void main()
{
	fstream out;
	out.open("f1.txt",ios::out);
	if(!out)
	{
		cerr<<"f1.txt can't open.\n";
		abort();
	}
	out<<"this is a string.\n";
	out<<"this is a program.\n";
	out<<"ok!\n";
	out.close();
}