C++ Program To Display String From Backward

#include<iostream>
using namespace std;
int main()
{
    char str[80];
  int l, i;
 cout<<"\n\nEnter a String: ";
    cin.getline(str, 80);
    for(l = 0; str[l] != '\0'; l++);// to find the length of a string
    cout<<"\n\nString From Backward is below\n\n";
    for(i = l - 1; i >= 0; i--)
    {
        cout << str[i];
    }
    return 0;
}