problem with control flow

[alikeshvari]

Hi every body
I want to write a program that get a char value and put it in the pointer array until the user reach to end of line. what is the problem with my code.
my code:

#include <iostream>
using namespace std;
int main(){
char str ;
int lenght=1 ;
char *mystr[lenght] ;
for(int i = 0; i < length ; i++){
cin.get (str);
*mystr[lenght] = str ;
++lenght ;
}
cout << lenght ;
return 0 ;
}