Palindrom in c++

#include<iostream.h>
#include<conio.h> 
int main() 
{
 int length=0;
int loop;
int i,j;
char arr[100], 
a[100]; 
cin>>arr;
for (i=0; arr[i]!='\0'; i++) length++;
loop=length;
for(j=0; j<length; j++) 
{ 
a[j]=arr[loop-1]; 
loop--; 
}
for (int k=0; k<length; k++)
{
 if(arr[k]==a[k]) 
continue;
else 
{
 cout<<"Not palandrome\n";
getch();
return 0; } 
}
 cout<<"Palandrome\n";
getch(); 
return 0;
}