2-14-1（2） 小玩文件

#include <iostream>
#include <cstdlib>
#include <fstream>
using namespace std;
int main()
{
fstream outfile,infile;
infile.open("abc.txt",ios::in); // (1)
if(!infile) {
cout<<"Can’t open the file."<<endl;
abort();
}
outfile.open("newabc.txt",ios::out);//(2)
if(!outfile) {
cout<<"Can’t open the file."<<endl;
abort();
}
char buf[80];
int i=1;
while(!infile.eof()) // (3)
{
infile.getline(buf,'\r'); //(4)
outfile<<i++<<": "<<buf<<endl; //(5)
}
infile.close();
outfile.close();
return 0;
}