Hello everyone
simply variable are names and the value of variable will store on the memory of PC. as variable is declared in the following format:
example of variableCode:<data type of variable> <name of variable>; OR <data type of variable> <name of variable>=<initial value of variable>;:
I want to understand how and where does value of variable store on memory of PC?Code:int i; /* * this declares the variables 'i', */ int i =6; /* * this declares the variables 'i', with assign value 6 */
The variable could be stored in either of two places, generally speaking, depending on how or where it is defined. If you declare that variable at global scope, it will be stored in the process's global data region. This is defined by the operating system. If you declare it within a function, it will typically be stored on the stack, unless it is declared to be static, in which case, it will be stored in the process's global data region.
You can also store variables in the "free store," or "heap," as it's more commonly called, by using malloc. This is generally done more often for large objects, such as memory buffers and structures.
As for how it is stored, on most C compilers for PC hardware, an int is 4 bytes, and is stored in memory least-significant-byte first. So in your example, starting at the memory address of your variable, you would find the four bytes (6, 0, 0, 0). You can experiment with this a bit, by taking the address of your variable, using the address-of operator (&), and cast it to a char pointer, then inspect the first four bytes, starting at the address stored in that pointer
What can this strange device be?
When I touch it, it gives forth a sound
It's got wires that vibrate and give music
What can this thing be that I found?
"simply variable are names and the value of variable will store on the memory of PC"
What???
for example int i,j,k; /* * this declares the variables name 'i', 'j' and 'k' */
int i,j,k=5; /* * this declares the variables name 'i', 'j' and 'k' and k=5 */
Please learn the difference between declare and define; then try to ask a question that makes some sense.Originally Posted by abhi143
What's the difference between declaring and defining in C and C++ - Cprogramming.com
Tim S.
"...a computer is a stupid machine with the ability to do incredibly smart things, while computer programmers are smart people with the ability to do incredibly stupid things. They are,in short, a perfect match.." Bill Bryson
In case you missed it, be sure to read Elkvis's answer as he's given some good info there.
