Create file containing lower case vowels from another file

//Program that reads a file first.txt and creates a new file second.txt which contains only those words from first.txt which starts from lower-case vowels.
/*first.txt:-
The C++ is a the general purpose the programmingthe language.
An appple a day keeps the doctor away.
History repeats itself.
All that glitters is not gold.
If life deals you lemons, make lemonade.
*/

#include<iostream.h>
#include<conio.h>
#include<fstream.h>
#include<ctype.h>
void main()
{
    clrscr();

    char a[80];
    ifstream ifile("first.txt");

    ofstream ofile("second.txt");

    while(!ifile.eof())
    {
        ifile>>a;
        if((a[0]=='a')||(a[0]=='e')||(a[0]=='i')||(a[0]=='o')||(a[0]=='u'))
        ofile<<a;
    }
    getch();
}