下列程序完成从文件读取文件显示的同时写入第二个文件,则在程序中划线部分应该出现的语句是 【14】 。#include<iostream, h>#include<fstream, h>void main(){ fstream filel, file2; char fnl [10], fn2[10], ch; cout<<"输入源文件名"; cin>>fn1; cout<<"输入目标文件名"; cin>>fn2; file1. open(fn1, ios :: in); ______while((ch=file1. get()) ! =EOF) { cout<<ch; file2. put(ch) } file1, close() file2, close(); }