程式設計講義----PGM10-07.cpp

[Kenad (..大拇指腫歪歪..)]

#include <fstream.h>
#include <stdlib.h>
const int MAXCHARS = 21;
const int NUMLINES = 5;  // number of lines
const int LINELEN = 80;  // maximum line length

int get_open(ofstream&);  // pass a reference to an ofstream
void in_out(ofstream&);   // pass a reference to an ofstream

int main()
{

  ofstream out_file;    // file1 is an fstream object

  get_open(out_file);   // open the file
  in_out(out_file);     // write to it
}

int get_open(ofstream& file_out)
{

  char name[MAXCHARS];

  cout << "\nEnter a file name: " << endl;
  cin.getline(name,MAXCHARS,'\n');

  file_out.open(name);      // open the file

  if (file_out.fail())      // check for successful open
  {
    cout << "Cannot open the file" << endl;
    exit(1);
  }
  else
    return 0;
}

void in_out(ofstream& file_out)
{
  int count;
  char line[LINELEN];   // enough storage for one line of text

  cout << "Please enter five lines of text:" << endl;
  for (count = 0; count < NUMLINES; ++count)
  {
    cin.getline(line,LINELEN,'\n');
    file_out << line << endl;
  }

  return;
}

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