C++ programming. Please Help!!!!

[Stephanie I]

This program is supposed to read what user inputs backword. The errors I get are:
Line 33: expected primary-expression before ']' token
Line 34: expected primany-expression before ']' token

#include<iostream>  
#include<string>     

using namespace std;  

int main() {
     string str;
     typedef char* CharHead;
     CharHead head; 
     typedef char* CharTail;
     CharTail tail;
     typedef char* CharCstr;  
     CharCstr cstr;
    
     int i = 0;     

     cout << "Enter a string: ";  
     getline(cin, str);  

     cstr = new char[str.size() + 1];  
     strcpy(cstr, str.c_str());  

     head = &cstr[0];  
     tail = &cstr[str.size() - 1];  
     
     cout << "String inverted is: "; 
     
     typedef char* CharTemp;  
     CharTemp temp;

while (head <= tail) // this should be done only halfway of string and not for complete string, as you are swapping them now.  
{  
     temp = cstr[]; 
     cstr[] = tail;  
     tail = temp;  
     tail--;  
     head++;  
     i++;  
}  
       
    cout << cstr;  
    cout <<"\n"; 
    system ("PAUSE");
    return 0;  

} 

[Stephanie I]

Anyone??

[Whovian]

I think it expects an integer between the []'s.

[Stephanie I]

if I put integer, I get the error:
Line 33: invalid conversion from 'char' to 'char*'
Line 34: invalid conversion from 'char' to 'char*'

[Stephanie I]

I can't use pointer arthimetic, this is why I need to do it this way.

[Stephanie I]

anyone?

[Zhuge]

if I put integer, I get the error:
Line 33: invalid conversion from 'char' to 'char*'
Line 34: invalid conversion from 'char' to 'char*'

The compiler is complaining that those assignments don't make sense. Applying the array subscript operator to a char* gives you a char, which you try to assign to/from a separate char*.