（1）問題及程式碼：

#include <iostream>
#include <fstream>
using namespace std;
int main()
 {
    fstream outfile,infile;
    outfile.open("data.dat",ios::out);
    outfile<<"1111111111"<<endl;
    outfile<<"aaaaaaaaaa"<<endl;
    outfile<<"AAAAAAAAAA"<<endl;
    outfile<<"**********"<<endl;
    outfile.close();
    infile.open("data.dat",ios::in);
    char line[80];
    int i=0;
    while(!infile.eof())
    {
        i++;
        infile.getline(line,sizeof(line));
        cout<<i<<": "<<line<<endl;
    }
    infile.close();
    return 0;
}
 

執行結果：

（2）問題及程式碼：

#include <iostream>
#include <fstream>
using namespace std;
int main()
{
    ifstream readFile;
    ofstream writeFile;
    char ch;
    readFile.open("a.txt", ios::in);
    writeFile.open("b.txt", ios::out);
    while (readFile.get(ch))
        writeFile.put(ch);
    readFile.close();
    writeFile.close();
    cout << "Finish!" << endl;
    return 0;
}
 

執行結果：

（3）問題及程式碼：

#include <iostream>
#include <fstream>
#include<cstring>
using namespace std;
int main()
{
    ifstream readFile;
    ofstream writeFile;
    char ch[100];
    readFile.open("a.txt", ios::in);
    writeFile.open("b.txt", ios::out);
    while (!readFile.eof())
    {
        readFile.getline(ch,100,'\n');
        writeFile.write(ch,strlen(ch));
        writeFile.write("\n",1);
    }
    readFile.close();
    writeFile.close();
    cout << "Finish!" << endl;
    return 0;
}
 

執行結果：