Lowercase Vowels

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 //prg to count no of lower case vowels in a string  
 //Downloaded From www.c4cpp.co.nr. (C)2009.All rights reserved.  
 #include<iostream.h>  
 #include<conio.h>  
 #include<stdlib.h>  
 #include<string.h>  
 #include<math.h>  
 #include<ctype.h>  
 void main()  
 {  
 clrscr();  
 char st[100];  
 int l,c,i;  
 cout<<"Enter the string"<<endl;  
 cin.getline(st,100);  
 l=strlen(st);  
 for(i=0;i<=l;i++)  
 {  
 if(islower(st(i))) && ((st(i)==a)||(st(i)==e)||(st(i)==i)||(st(i)==o)||(st(i)==u))  
 c++;  
 }  
 cout<<"The no is"<<c;  
 getch();  
 }