Program for Manipulating Arrays Using Pointers with Explanation

Program

#include <stdio.h>
void printarr(int a[]);
void printdetail(int a[]);
void print_usingptr(int a[]);
main()
{
    int a[5];
    for(int i = 0;i<5;i++)
    {
        a[i]=i;
    }
    print_usingptr(a);
}
void printarr(int a[])
{
    for(int i = 0;i<5;i++)
    {
        printf("value in array %d\n",a[i]);
    }
}
void printdetail(int a[])
{
    for(int i = 0;i<5;i++)
    {
        printf("value in array %d and address is %8u\n",a[i],&a[i]);
    }
}
void print_usingptr(int a[])
{
    int *b;
    b=a;
    for(int i = 0;i<5;i++)
    {
        printf("value in array %d and address is %16lu\n",*b,b);
        b++;                  // A
    }
}

Explanation

1. This function is similar to the preceding function except for the difference at statement A. In the previous version, b = b+2 is used. Here b++ is used to increment the pointer.

2. Since the pointer is a pointer to an integer, it is always incremented by 2.