Написать программу, которая будет зеркально выводить введенную строку - C++

# include <iostream>
# include <stdlib.h>
# include <conio.h>
 
 
using namespace std;
 
int main()
 
{
int i, j, k=0;
const int n=100;
char arr[n], mir[n];
 
cout<< "enter string: ";
 
gets(arr);
 
for(i=0; i< n ;i++) if(arr[i] ) k++;
 
cout<< endl << "mirror of your string is: ";
for( i=k, j=0; i>-1; i--, j++ ) 
         mir[j] = arr[i];
 
cout<< mir;
 
 
return 0;
    
}

for(i=0; i< n ;i++) if(arr[i] ) k++;// length of string
 
cout<< endl << "mirror of your string is: ";
for( i=k, j=0; i>-1; i--, j++ ) // content of the last index of arr copy to the content of the first index mir, and so on till the arr[0]

    char buf[100];
    int i = 0;
 
    gets(buf);
 
    while (buf[i])
        i++;
 
    for (int j = i - 1; j >= 0; j--)
        cout << buf[j];
 
    cout << endl;

for (int j = i - 1; j >= 0; j--)

while (buf[i])
        i++;

int main()
 
{
int i, j, k=0;
const int n=100;
char arr[n], mir[n], ch;
 
cout<< "enter string: ";
 
gets(arr);
 
for(i=0; i< n ;i++) if(arr[i] ) k++;// length of string
else break;//out of cycle
cout<< endl << "mirror of your string is: ";
for( i=k-1, j=0; i>-1; i--, j++ ) // content of the last index of arr copy to the content of the first index mir, and so on till the arr[0]
         mir[j] = arr[i];
 
cout<< mir;
 
return 0;
    
}

for (int j = i - 1; j >= 0; j--)

for (int j = 1 -1; j>=0; j--);