Declaring Integrars in a Switch // Case situtation

Hey guys...Im trying to declare z to either times multiply add subtract or devide. I take 2 numbers from the user at the beggining right...and then i ask them weather they wanna subtract (S) multiply (M) devide (D) or add (A) and watever they type in...the 2 numbers will do..heres the switch code:

switch(entry)
{
case 'm':
case 'M':
int z = x*y;
cout<<"Your numbers multiplied are:"<<z <<endl;
break;

case 'D':
case 'd':

cout<<"Your numbers devided are:"<<z <<endl;
break;

case 'S':
case 's':

cout<<"Your numbers subtracted are:"<<z <<endl;
break;

case 'A':
case 'a':

cout<<"Your numbers added are:"<<z <<endl;
break;

default:
{
cout<<"Sorry, You've entered an invalid character. Please retry!"<<endl;
}

}

where it sais <<z is where its gonna do watever method to the 2 numbers x and y. Where do i declare z each new time? how do i declare it?

When you did
cin >> x;
cin >> y;

Did you do a
cin >> entry;

And how did you declare entry.

Otherwise, it looks good.

Yea i did..cuz the entry is for weather the user types in S M D or A....and the X and Y is for the numbers..and the Z is for the 2 numbers either S (subtracted) M (multiplied) D (devided) or A (added) ...but i wanna know where i declare that z = x*y for multipling or z = x-y for subtracting.etc...in the cases..where would i declare that?

OIC
Declare z when you declare x and y

int x, y, z;

Yes yes yes!!!!!!! Its all coming together now!! I understand!!!! :)
Im gonna take it a stetp further now...im now doing:

cout<<" "<<x " multiplied by "<<y ", equals "<<z <<endl;


wat is wrong with that? theres an error...but i dont know how to correct it

nvm got it. heh...thanks guys:)....next question...how would i do a loop kinda thing..where at the end..the user can press a key or sumthin and it reduz the program all over again without reopening it? anyone help?

use a while loop...

char GoOn = y;
while(GoOn == y)
{
//do stuff
//ask if user wants to go on
}

sorry im not familiar with while declaration....can u explain the code for me plz?

http://www.cprogramming.com/tutorial/lesson3.html

That's all about loops...if you still have question lemme know and I'll edplan in more detail.

yea im totally pysched out. could you go through the code with me blocks at a time? id really appreciate it