Swap Function - How to

Hello everyone, I'm trying to make a simple C++ game but I came across with some problems which are giving me a hard time.

I'll post a portion of code so you can understand my 'problem' better.

Code:

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void main()
{
    char cord1('1');
    char cord2('2');
    char cord3('3');
    char cord4('4');
    char cord5('5');
    char cord6('6');
    char cord7('7');
    char cord8('8');
    char cord9(' ');


    bool WinGame = true;

       
        cout<<"  " <<cord1 <<"  |  " <<cord2 <<"  |  " <<cord3 <<endl;
        cout<<"-----+-----+-----" <<endl;
        cout<<"  " <<cord4 <<"  |  " <<cord5 <<"  |  " <<cord6 <<endl;
        cout<<"-----+-----+-----" <<endl;
        cout<<"  " <<cord7 <<"  |  " <<cord8 <<"  |  " <<cord9 <<endl <<endl;


        int Play;


        cout<<"Wich piece do you wish to move?: ";
        cin>>Play;
        cin.ignore();

---

When the user inserts an integer from 1 to 8 (which are part of the game board), THAT integer is supposed to swap with the empty square.
Example:

1 | 2 | 3
4 | 5 | 6
7 | 8 |

Wich piece do you wish to move?: 1

| 2 | 3
4 | 5 | 6
7 | 8 | 1

I made some research and I know there is a "swap" function somewhat, I just don't know how to implement it (yet).

Thanks in advance, hope you can give me a hand.


PS. The code is NOT complete. It is just an example as to how I defined the slots of the game board

The swap function is easy:

Code:

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int arr[9] = { /* Initialize it... */ };
std::swap(arr[0], arr[8]);

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swap is in <algorithm>.

That was helpful, tyvm

FYI in C++ 11 swap is in <utility>

std::swap has always been in utility. Any improvement C++11 added was in r-value references.

According to swap - C++ Reference, it was in <algorithm> pre-C++11.

I guess my implementation of utility always included algorithm then. That's kind of ........ty.

Also, don't use void main(). In C++, the main() function must return int.

I've used void main() for a couple of games I made before and it worked just fine just like it is working now.

Quote:

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Originally Posted by Khabz

I've used void main() for a couple of games I made before and it worked just fine just like it is working now.

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Well yes, your computer isn't going to explode because of it, but per the C++ standard, void main() is not valid C++. It's not a biggie, but then again it's not that much extra work to write int main instead of void main, especially considering that the effect is that your program would then be standard-compliant (at least in that particular respect).

Quote:

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Originally Posted by Khabz

I've used void main() for a couple of games I made before and it worked just fine just like it is working now.

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void main(void) - the Wrong Thing

Okay thanks for the info :) I will change it