Checking whether a String is Palindrome,Complete Source Code

Strings which are read the same, both forward and backward  are called Palindrome Strings eg:malayalam. Palindrome checking is a Common Program for Beginners.The program below can be used to check whether a String is a Palindrome.

 #include<stdio.h>  
 #include<conio.h>  
 #include<string.h>  
 void main()  
 {  
 int i,l,f=0;  
 char a[20];  
 printf("\nEnter the string:");  
 scanf("%s",a);  
 l=strlen(a);  
 for(i=0,l=l-1;a[i]!='\0';i++,l--)  
 {  
 if(a[i]!=a[l])  
 {  
 f=1;  
 break;  
 }  
 }  
 if(f==0)  
 printf("String is palindrome");  
 else  
 printf("String is not palindrome");  
 }