C Program to Read a Memory Address Using scanf() and Print Its Value

In C programming, we use variables to store data. But there's another way: memory addresses. These are like exact spots in your computer's memory. They let you work directly with data. Learning about them gives you more control.
This guide will show you a simple program.

It will:
Take a memory address as input. We will use scanf() for this.
Then, it will show you the value stored at that exact address.
Important note: This is a bit advanced. You usually don't ask users for memory addresses in normal programs. But it's great for learning how pointers work in C."
Practical Implementations:

#include <stdio.h>
int main() {
    int x = 100;
    int *ptr;

    // Ask the user to enter a memory address (in hexadecimal)

    printf("Enter a memory address (in hexadecimal, e.g., %p): ", (void*)&x);
    scanf("%p", (void**)&ptr); // Read the address into a pointer

    // Print the value at that memory address
    printf("Value at memory address %p is: %d\n", (void*)ptr, *ptr);

    return 0;
}

Output:
Enter a memory address (in hexadecimal, e.g., 0x7ffee2b83b8c): 0x7ffee2b83b8c
Value at memory address 0x7ffee2b83b8c is: 100

Description:
int x = 100; creates an integer with value 100.
(void*)&x gives the memory address of x, which we can input during the program run.
scanf("%p", (void**)&ptr); reads the hexadecimal memory address from the user and stores it in ptr.
*ptr then reads the actual value at that memory location.

How to Read a Memory Address Using scanf() in C and Print Its Value

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