C Program To Display String From Backward

#include<iostream>
using namespace std;
int main( )
{
    char str[80];
    cout<<"Enter string: ";
    cin.getline(str, 80);
    int l; //Hold length of string
    //Find the length of the string
    for(l = 0; str[l] != '\0'; l++);
    //Display the string backwards
    for(int i = l - 1; i >= 0; i--)
    {
        cout << str[i];
    }
    return 0;
}