I am having an issue with the following code for C$++.$

b#include "Rectangle.h$"$

#include "Circle.h$"$

#include

void showShape$($Shape$*$ shape$)$

$\{$

shape$->$draw$()$;

$\}$

$//$Why can you use a pointer and not a Shape object?

$//$I could not get this to work with a showShape$($uniquePtr shape$)$ function.

void showShape$($unique$\_$ptr shape$)$

$\{$

shape$->$draw$()$;

$\}$

int main$()$

$\{$

vector shapes;

Rectangle rectangle$(2\mathrm{.}0,3\mathrm{.}0)$;

shapes.push$\_$back$($&rectangle$)$;

Circle circle$(4\mathrm{.}0)$;

shapes.push$\_$back$($&circle$)$;

for $($int i $=0$; i $<$ shapes.size$()$; i$++)$

$\{$

showShape$($shapes$.$at$($i$))$;

$//$cout $<<$ shapes.at$($i$)<<$ endl;

$\}$

cout $<<$ endl;

vector $>$ uniqueShapes $(4)$;

unique$\_$ptr rectanglePtr;

rectanglePtr $=$ make$\_$unique $(5\mathrm{.}0,6\mathrm{.}0)$;

$//$rectanglePtr$->$draw$()$;

unique$\_$ptr circlePtr;

circlePtr $=$ make$\_$unique $(7\mathrm{.}0)$;

$//$circlePtr$->$draw$()$;

uniqueShapes.at$(0)=$ move$($rectanglePtr$)$;

uniqueShapes.at$(1)=$ move$($circlePtr$)$;

$//$uniqueShapes$.$push$\_$back$($move$($rectanglePtr$))$;

$//$uniqueShapes$.$push$\_$back$($move$($circlePtr$))$;

$//$Press control $+$ k $+$ c to comment out large sections of code.

$//$Press control $+$ k $+$ u to undo the commented out code.

uniqueShapes.at$(2)=$ make$\_$unique $(8\mathrm{.}0,9\mathrm{.}0)$;

uniqueShapes.at$(3)=$ make$\_$unique $(10\mathrm{.}0)$;

$//$uniqueShapes$.$push$\_$back$($make$\_$unique $(8\mathrm{.}0,9\mathrm{.}0))$;

$//$uniqueShapes$.$push$\_$back$($make$\_$unique $(10\mathrm{.}0))$;

for $($int i $=0$; i $<$ uniqueShapes.size$()$; i$++)$

$\{$

$//$showShape$($uniqueShapes$.$at$($i$))$;

$//$This line above says that is has been deleted somewhere already. I do not know why.

uniqueShapes.at$($i$)->$draw$()$;

$\}$

for $($auto index : shapes$)$

$\{$

delete index;

$\}$

$\}$

The T$.$A$.$ said it is supposed to work the same, but did not help me solve the issue. I only have the one instance of the delete $($right above$).$ None of my header or cpp files use delete. Why is showShape$($uniqueShapes$.$at$($i$))$; not working?