Really Need Help in Palindrome Strings

Code:

#include <iostream.h>
#include <fstream>
using namespace std;

main()
{
    char strn[80];
    int i,j,len;
    
     
    ifstream myFile("input.txt");
    
    while(myFile.getline(strn,80)){
    cout<<strn<<endl;
    
    bool flag=false;
    
    len=strlen(strn);
    for(i=0,j=len-1;i<=(len/2);i++,j--)
    {
    if(strn[i]==strn[j])
    flag=true;
    }
    if(flag)
       {
             cout<<"Palindrome"<<endl<<endl;
             }
             else
             {
                 cout<<"Not a palindrome"<<endl<<endl;
                 }
}
cout<<endl;
system("pause");
}

can someone correct the code for me ? because i got a little bit wrong answers of my program . . .

the word from the .txt is

A car, a man, a maraca. =it is a palindrome
Palindromelist =it is not palindrome
Your Ad Here =it is not palindrome
A Toyota’s a Toyota. = palindrome
Animal loots foliated detail of stool lamina. =palindrome
Was it a cat I saw? = it is palindrome also
A word, phrase, verse, or sentence that reads the same backward or forward = not a palindrome
1001 = palindrome. .

but at my output of my program . . .

Your Ad here is a palindrome

A word, phrase, verse, or sentence that reads the same backward or forward = is a palindrome

and that 2 sentence must not be palindrome it must be not a palindrome
i got 2 wrong answer . ..plz i really need help . .

You should start with flag is true, then set it to false (and exit your loop) when you find the first pair of characters that fail the test.

As it stands, your test only works to find ANY pair of letters which match, not ALL of them.

Oh, and your indentation still sucks.