C Array Elements Memory Locations

Array Elements Memory Locations

Array elements are always stored in continuous memory locations.

Memory locations address can be accessed using '&' symbol.

#include<stdio.h>
                                                                                
void main()                                                                     
{                                                                               
    int numbers[] = {10, 20, 30, 40, 50};                                       
    int i = 0;                                                                  
                                                                                
    while(i<5)                                                                  
    {                                                                           
        printf("address: %u\t", &numbers[i]);                                   
        printf("number: %d\n", numbers[i]);                                     
        i++;                                                                    
    }                                                                           
}     

$ cc array-mem-locations.c 
$ ./a.out 
address: 1713697360	number: 10
address: 1713697364	number: 20
address: 1713697368	number: 30
address: 1713697372	number: 40
address: 1713697376	number: 50

Access the Array Elements Using Pointers

A pointer when incremented always points to an immediately next location of it's type.

#include<stdio.h>
                                                                                
void main()                                                                     
{                                                                               
    int numbers[] = {10, 20, 30, 40, 50};                                       
    int i = 0, *j;                                                              
                                                                                
    j = &numbers[0];                                                            
                                                                                
    while(i<5)                                                                  
    {                                                                           
        printf("address: %u\t", &numbers[i]);                                   
        printf("number: %d\n", *j);                                             
        i++;                                                                    
        j++;                                                                    
    }                                                                           
}   

$ cc array-elements-using-pointers.c
$ ./a.out 
address: 726339664	number: 10
address: 726339668	number: 20
address: 726339672	number: 30
address: 726339676	number: 40
address: 726339680	number: 50