#include <stdio.h>

int main() {
    int num=0;

    printf("Enter a number from 0-100:");
    scanf("%d",&num);    
    
    /* think of scanf performing two tasks:
       1) reads the raw input from the user, based on the format specifier  (%d for integers)
       2) Stores the user input at the memory address of the variable (provided by &num).
    */
    
    printf("\nYou typed in %d %p\n",num,&num);
    return 0;
}

/*
 *The symbol table is meant to show how variables are represented in memory
 *symbol table
 
  symbol name,  address,   size
  num           1000       4 bytes (32 bits)
    
1000 [0000 0000][0000 0000][0000 0000][0100 0001]     [0000 0000][0000 0000][0000 0000][0000 0000]
1008 [0000 0000][0000 0000][0000 0000][0000 0000][0000 0000][0000 0000][0000 0000][0000 0000]
1016 [0000 0000][0000 0000][0000 0000][0000 0000][0000 0000][0000 0000][0000 0000][0000 0000]
1024 [0000 0000][0000 0000][0000 0000][0000 0000][0000 0000][0000 0000][0000 0000][0000 0000]
1032 [0000 0000][0000 0000][0000 0000][0000 0000][0000 0000][0000 0000][0000 0000][0000 0000]
1040 [0000 0000][0000 0000][0000 0000][0000 0000][0000 0000][0000 0000][0000 0000][0000 0000]
1048 [0000 0000][0000 0000][0000 0000][0000 0000][0000 0000][0000 0000][0000 0000][0000 0000]
1056 [0000 0000][0000 0000][0000 0000][0000 0000][0000 0000][0000 0000][0000 0000][0000 0000]
1064 [0000 0000][0000 0000][0000 0000][0000 0000][0000 0000][0000 0000][0000 0000][0000 0000]
*/