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//Listing 17.17 Appending to the End of a File
#include <fstream>
#include <iostream>
using namespace std;
int main() // returns 1 on error
{
// PARTE 1: ABRIENDO ARCHIVO
char fileName[80];
char buffer[255];
cout<<"Please reenter the file name: ";
cin >> fileName;
ifstream fin(fileName);
if (!fin) // already exists?
{
cout<<"Unable to open "<<fileName<<" for reading.\n";
return(1);
}
cout<<"Current file contents:\n";
char ch;
while( fin.get(ch) )
cout<<ch;
cout<<"\n***End of file contents.***\n";
fin.close();
// PARTE 2: AGREGANDO TEXTO AL FINAL DEL ARCHIVO
cout<<"\nOpening "<<fileName<<" in append mode...\n";
ofstream fout(fileName, ios::app);
if( !fout ){
cout<<"Unable to open "<<fileName<<" for appending.\n";
return(1);
}
cout<<"\nEnter text for the file: ";
cin.ignore(1,'\n');
cin.getline(buffer, 255);
fout<<buffer<<"\n";
fout.close();
// PARTE 3: REABRIENDO EL ARCHIVO MODIFICADO
fin.open(fileName); // reassign existing fin object!
if( !fin ){
cout<<"Unable to open "<<fileName<<" for reading.\n";
return(1);
}
cout<<"\nHere's the contents of the file:\n";
//char ch;
while( fin.get(ch) )
cout<<ch;
cout<<"\n***End of file contents.***\n";
fin.close();
return 0;
}
xdw
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