Command line argument example 03

CLA03.cpp

// Command line argument example #03

#include <iostream>
#include <fstream>
#include <cassert>

using namespace std;


int main ( int argc, char *argv[] )
{
  string st;
  fstream filestr;
  
  if ( argc < 2 ) {
    cout<<"usage: "<< argv[0] <<" <filename>\n";
    exit(1);
  }

  filestr.open(argv[1]);
  assert(filestr.is_open());

  filestr >> st;
  while(!filestr.eof()) {
    cout << st << " ";
    filestr >> st;
  } 
  
  filestr.close();
}