How Does Visual Studio Compiler Handle Overwritten Variable Values Like int x=5; x=6; x=7?

Hi guys, I'm working with visual studio compiler and I'm now know why is that correct:if I write:int x=5;x=6;x=7;
then the last value of x is saved into x, so how the other values (5 or 6) got deleted? is the PC delete the previous data? if so , so how he's deleting them?! if he doesn't delete them, then where the value of 5, 6 gone?!
thanks alot.

Ryan
Trying to make this as simple as possible to aid your understanding. A computer has memory called RAM and the RAM has an address and data. The address tells the PC where to look for the data, and the data is a binary value that can be modified. When you first start your PC the data in the RAM could be any binary value at all until the PC assigns it something specific.

In your example you have a variable called "x". You then assigned it a value of "5". Your PC would store this data in the RAM at a specified address. When you then reassigned variable "x" to "6" all your PC did was change the value of "x" from 5 to 6. It didn't delete "x" it just assigned it a new value.
The contents of all memory locations are just numbers, that is all. You just change it from one number to another. If you do a web search for RAM or memory you will find a lot of useful information on how this is achieved such as here
https://www.explainthatstuff.com/how-computer-memory-works.htmlRegards

Another way to look at this is to think of the value in variable "x" as a pattern in a series of switches. This is very close to how the hardware memory actually works.By setting the new value, you alter the pattern of switches which are on or off. The old pattern is destroyed when you set the new pattern.So, imagine we have three switches labelled "1", "2" and "4".  To set a value, ensure that you switch on the switches which add up to your value. The value "5" would be represented by the "1" and "4" switches being on. (1+4 = 5)
When you first assign the value "5" to the switches, you would switch "1" and "4" on, and make sure that "2" is off.
Then, when you assign "6", you would ensure that "2" and "4" are on, and "1" is off (2+4 = 6). The act of changing the switches is what erases the old value.In a real system, each value is represented by more than three switches (usually 8, 16, 32 or 64) but the rule is the same. Changing the switches to a new pattern erases the old pattern.

To get even simpler, suppose you have a whiteboard that we decide to call 'x', an eraser, and a whiteboard marker.First you use your marker to write the number 5 on your whiteboard (which we're calling 'x').You have a cup of coffee, then you use your eraser to rub out the 5 and you use your pen to write the number 6.Now you go for a walk. When you come back, you use your eraser to rub out the 6 and you use your pen to write the number 7.
Now, let me ask your question back to you: "where the value of 5, 6 gone?!"