Program for length of string without using in-built and check for palindrome

C program to find the length of a given string without using in-built
function. Also check for palindrome.

#include
#include
void main()
{
int m,n,i,j,l;
char a[50],*p;
clrscr();
printf("Enter String to check palindrome or not\n");
gets(a);
p=a;l=0;
while(*p!='\0')
{
l++;
p++;
}
p--;
printf("\nLength Of String Is == %d\n",l);
for(i=0;i<=l/2;i++,p--)
{
if(a[i]!=*p)
{
printf("\n\nString is not Palindrome");
break;
}

}
if(a[i]==*p)
printf("\n\nString Is Palindrome");
getch();
}
/*Output
Enter String to check palindrome or not
123321

Length Of String Is == 6


String Is Palindrome
*/