ram_address.c

#include <stdio.h>

int main() {
    
	int a = 9; //4 bytes
    int *ap = &a;//& is the operator to get the address
    //int b = *ap; //--->*Pointer get the value in the address (Pointer), don't be confused!!!
    int *b = ap; 
     
    //printf("1. a: %d, at address: %p or %p\n",a,ap,&a);
    //printf("1. b: %d, at address: %p\n\n\n",b,&b);
    printf("1. b: %d, at address: %p\n\n\n",b,b);
    
    //b=10;
    //printf("2. a: %d, at address: %p or %p\n",a,ap,&a);
    //printf("2. b: %d, at address: %p\n",b,&b);
    
    *b = 20;
    printf("2. a: %d, at address: %p or %p\n",a,ap,&a);
    printf("2. b: %d, at address: %p\n",*b,b);
    
	
	//int var = 10;
    //printf("var's value: %d\n", var);
    //printf("var's address in RAM: %p\n", &var);// %p: pointer data type, & is the operator to get the address
    //int *ptr = &var; //pointer for integer type, get the address in RAM of the variable var
	//printf ("The value at address %p is %d.\n",ptr,*ptr);// The * here is a dereference operator, which can get the variable value at this address
	
	//*ptr = 20;
    //printf("1. var = %d\n", var);
    //printf("1. *ptr = %d\n", *ptr);
	//printf("1. RAM address: %p\n\n",ptr);// address is the same.
//	
	//var= 30;	
    //printf("2. var = %d\n", var);
    //printf("2. *ptr = %d\n", *ptr);
	//printf("2. RAM address: %p",ptr);
    return 0;
}