Practical List – 3
1.
WAP to print address of variable.
Program:
#include
<stdio.h>
#include
<conio.h>
void
main()
{
clrscr();
int number = 5, *ptr;
ptr = &number;
printf("Address of number: %u", ptr);
printf("\nValue of number: %u", *ptr);
printf("\nAddress of ptr: %u", &ptr);
getch();
}
Output:
Address
of number: 2856320204
Value
of number: 5
Address
of ptr: 2856320192
2.
WAP to access element using pointer.
Program:
#include
<stdio.h>
#include
<conio.h>
void
main()
{
clrscr();
int arr[] = {10, 20, 30, 40, 50};
int *ptr;
ptr = &arr[0];
for (int i = 0; i < 5; i++)
{
printf("\narr[%d] = %d", i, *(ptr + i));
}
getch();
}
Output:
arr[0]
= 10
arr[1]
= 20
arr[2]
= 30
arr[3]
= 40
arr[4]
= 50
Please follow me for more practicals....
3.
WAP to read & print array elements using pointer.
Program:
#include
<stdio.h>
#include
<conio.h>
void
main()
{
clrscr();
int arr[5], i;
int *ptr;
ptr = &arr[0];
printf("\nEnter the array elements:\n");
for (i = 0; i < 5; i++)
{
printf("Enter arr[%d] = ", i);
scanf("%d", (ptr + i));
}
printf("\nPrinting array elements:");
for (i = 0; i < 5; i++)
{
printf("\narr[%d] = %d", i, *(ptr + i));
}
getch();
}
Output:
Enter
the array elements:
Enter
arr[0] = 10
Enter
arr[1] = 20
Enter
arr[2] = 30
Enter
arr[3] = 40
Enter
arr[4] = 50
Printing
array elements:
arr[0]
= 10
arr[1]
= 20
arr[2]
= 30
arr[3]
= 40
arr[4]
= 50
4.
WAP for pointer to pointer.
Program:
#include
<stdio.h>
#include
<conio.h>
int
main()
{
clrscr();
int a, *ptr1, **ptr2, ***ptr3;
ptr1 = &a, ptr2 = &ptr1, ptr3 = &ptr2;
printf("\nAddress of normal variable 'a' = %u\n", ptr1);
printf("Address of pointer variable '*ptr1' = %u\n", ptr2);
printf("Address of pointer-to-pointer '**ptr2' = %u\n", ptr3);
return 0;
}
Output:
Address
of normal variable 'a' = 1293940644
Address
of pointer variable '*ptr1' = 1293940632
Address
of pointer-to-pointer '**ptr2' = 1293940624
Please follow me for more practicals....
5.
WAP of void pointer.
Program:
#include
<stdio.h>
#include
<conio.h>
int
main()
{
clrscr();
int iNum = 10;
float fNum = 10.202022;
void *ptr;
ptr = &iNum;
printf("\nValue of iNum = %d", *((int *)ptr));
ptr = &fNum;
printf("\nValue of fNum = %f", *((float *)ptr));
return 0;
}
Output:
Value
of iNum = 10
Value
of fNum = 10.202022
6.
WAP of null pointer.
Program:
#include
<stdio.h>
#include
<conio.h>
int
main()
{
clrscr();
int *ptr = NULL;
if (ptr == NULL)
{
printf("Pointer is NULL\n");
}
else
{
printf("Pointer is not NULL\n");
}
return 0;
}
Output:
Pointer
is NULL
7.
WAP of array of pointer.
Program:
#include
<stdio.h>
#include
<conio.h>
const
int MAX = 3;
int
main()
{
clrscr();
int arr[] = {10, 100, 200};
int i, *ptr[MAX];
for (i = 0; i < MAX; i++)
{
ptr[i] = &arr[i];
}
for (i = 0; i < MAX; i++)
{
printf("Value of arr[%d] = %d\n", i, *ptr[i]);
}
return 0;
}
Output:
Value
of arr[0] = 10
Value
of arr[1] = 100
Value
of arr[2] = 200
Please follow me for more practicals....
