f01b.cpp

//Lab Program 1 Part b: Repeat the exercise using an input file specified by the user instead of the standard input and using an output file specified by the user instead of the standard output.

#include<iostream>	
#include<string.h>
#include<fstream>
#include<stdlib.h>

using namespace std;

int main()		
{
	string name, rev;
	char infile[30], outfile[30];
	fstream fpinp, fpoutp;	
	int j;

	system("clear");	
	
	cout<<"Enter the input filename: \n";
	cin>>infile;

	cout<<"Enter the output filename: \n";
	cin>>outfile;
	
	fpinp.open(infile, ios::in);
	fpoutp.open(outfile, ios::out);

	if(!fpinp||!fpoutp)
	{
		cout<<"FATAL ERROR!: Unable to open the file(s)";
		exit(0);
	}
	while(fpinp)
	{
		getline(fpinp, name);
		rev.erase();		
		for(j=name.length()-1; j>=0; j--)
			rev+=name[j];			
		fpoutp<<rev<<endl;
	}	

	fpinp.close();
	fpoutp.close();

	return 0;	
}