[Practice 6.2] Why isn’t this code accepted/working?

Question

Hello, I’m a newbie who just started coding a few weeks ago :) I’m curious on why this code doesn’t swap the numbers around. Thanks, in advance!

#include <iostream>
using namespace std;

int main() {
int aquariumDavid = 8;
int aquariumAlex = 11;
int aquariumthree = 8 + 11;

// your code goes here
{
int aquariumDavid = aquariumthree - 11;
}

{
int aquariumAlex = aquariumthree - 8;
}

cout << "David's aquarium: " << aquariumDavid << endl;
cout << "Alex's aquarium: " << aquariumAlex;
return 0;
}

Edit: I eventually got pass the practice with a different code, I’m just curious on why this doesn’t work :)

Answer 1

Because aquariumDavid/Alex is not the aquariumDavid/Alex you think

What you're actually doing is:

int aD = 8;
int aA = 11;
int t = 8 + 11;

{
int aD1 = t-11;
}

{
int aA1 = t-8;
}

Also, aD1 and aA1 are lost once you exit the {}

To solve this just delete the int before those statements, so you don't create new variables

Answer 2

Yep, it works now! I’ve just realized that I’ve completely messed up basic math too, haha