C++primer plus第六版课后编程题答案17.3

main173.cpp

#include <iostream>
#include <fstream>
#include <string>
using namespace std;
void main173()
{
ofstream fout;
ifstream fin;
char filename[50];
cout<<"Enter the file source:";//请输入当前目录下的文件，不可输入路径名，否则会出错
cin>>filename;
fin.open(filename);
while(!fin.is_open())//打开失败
{
cout<<"\nWrong filename ,can't open it!";
cout<<"Enter the file source:";
cin>>filename;
fin.open(filename);
}
char copy[50]={"Copy"};
strcat(copy,filename);//要写入的文件,因为我是在前面+Copy的
fout.open(copy);
while(!fout.is_open())//打开失败
{
cout<<"\nWrong Copyfilename ,can't open it!";
fout.open(copy);
}
string temp;
while(!fin.fail())
{
getline(fin,temp);
fout<<temp;
fout<<endl;
}
if(fin.eof())
cout<<"Copy complete!"<<endl;
else
cout<<"copy failed!"<<endl;

fin.close();
fout.close();

cin.get();

}