714.cpp

C++实训教程

//714.CPP  
//demo fstream 先向文件写一个整型数组，然后读出
#include <iostream.H>
#include <fstream.H>
main(void)
{
  int n[5]={1,2,3,4,5};
  int i;
  ofstream outFile("714.dat");
  if(!outFile)
  {
    cout << "Cannot open file";
    return 1;
  }
  outFile.write((unsigned char*)&n,sizeof n);
  outFile.close();
  for(i=0;i<5;i++)  n[i]=0;   //clear array
  ifstream inFile("714.dat");
  inFile.read((unsigned char *)&n,sizeof n);
  for(i=0;i<5;i++)      //show values read from file
    cout << n[i] << " ";
  cout << endl;
  inFile.close();
  return 0;
}
/*
1 2 3 4 5
*/