C Programming Exercises, Practice, Solution : Pointer
This resource offers a total of 110 C Pointer problems for practice. It includes 22 main exercises, each accompanied by solutions, detailed explanations, and four related problems.
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1. Basic Pointer Declaration
Write a program in C to show the basic declaration of a pointer.
Expected Output :
Pointer : Show the basic declaration of pointer :
-------------------------------------------------------
Here is m=10, n and o are two integer variable and *z is an integer
z stores the address of m = 0x7ffd40630d44
*z stores the value of m = 10
&m is the address of m = 0x7ffd40630d44
&n stores the address of n = 0x7ffd40630d48
&o stores the address of o = 0x7ffd40630d4c
&z stores the address of z = 0x7ffd40630d50
2. Pointer Handling Demonstration
Write a program in C to demonstrate how to handle pointers in a program.
Expected Output :
Address of m : 0x7ffcc3ad291c
Value of m : 29
Now ab is assigned with the address of m.
Address of pointer ab : 0x7ffcc3ad291c
Content of pointer ab : 29
The value of m assigned to 34 now.
Address of pointer ab : 0x7ffcc3ad291c
Content of pointer ab : 34
The pointer variable ab is assigned with the value 7 now.
Address of m : 0x7ffcc3ad291c
Value of m : 7
3. Use of & and * Operators
Write a program in C to demonstrate the use of the &(address of) and *(value at address) operators.
Expected Output :
Pointer : Demonstrate the use of & and * operator :
--------------------------------------------------------
m = 300
fx = 300.600006
cht = z
Using & operator :
-----------------------
address of m = 0x7ffda2eeeec8
address of fx = 0x7ffda2eeeecc
address of cht = 0x7ffda2eeeec7
Using & and * operator :
-----------------------------
value at address of m = 300
value at address of fx = 300.600006
value at address of cht = z
Using only pointer variable :
----------------------------------
address of m = 0x7ffda2eeeec8
address of fx = 0x7ffda2eeeecc
address of cht = 0x7ffda2eeeec7
Using only pointer operator :
----------------------------------
value at address of m = 300
value at address of fx= 300.600006
value at address of cht= z
4. Add Two Numbers with Pointers
Write a program in C to add two numbers using pointers.
Test Data :
Input the first number : 5
Input the second number : 6
Expected Output :
The sum of the entered numbers is : 11
5. Add Numbers Using Call by Reference
Write a program in C to add numbers using call by reference.
Test Data :
Input the first number : 5
Input the second number : 6
Expected Output :
The sum of 5 and 6 is 11
6. Maximum of Two Using Pointer
Write a program in C to find the maximum number between two numbers using a pointer.
Test Data :
Input the first number : 5
Input the second number : 6
Expected Output :
6 is the maximum number.
7. Print Array Using Pointer
Write a program in C to store n elements in an array and print the elements using a pointer.
Test Data :
Input the number of elements to store in the array :5
Input 5 number of elements in the array :
element - 0 : 5
element - 1 : 7
element - 2 : 2
element - 3 : 9
element - 4 : 8
Expected Output :
The elements you entered are : element - 0 : 5 element - 1 : 7 element - 2 : 2 element - 3 : 9 element - 4 : 8
8. Permutations of a String Using Pointers
Write a program in C to print all permutations of a given string using pointers.
Expected Output :
The permutations of the string are : abcd abdc acbd acdb adcb adbc bacd badc bcad bcda bdca bdac cbad cbda cabd cadb cdab cdba db ca dbac dcba dcab dacb dabc
9. Largest Element Using Dynamic Memory Allocation
Write a program in C to find the largest element using Dynamic Memory Allocation.
Test Data :
Input total number of elements(1 to 100): 5
Number 1: 5
Number 2: 7
Number 3: 2
Number 4: 9
Number 5: 8
Expected Output :
The Largest element is : 9.00
10. String Length Using Pointer
Write a program in C to calculate the length of a string using a pointer.
Test Data :
Input a string : w3resource
Expected Output :
The length of the given string w3resource is : 10
11. Swap Elements Using Call by Reference
Write a program in C to swap elements using call by reference.
Test Data :
Input the value of 1st element : 5
Input the value of 2nd element : 6
Input the value of 3rd element : 7
Expected Output :
The value before swapping are :
element 1 = 5
element 2 = 6
element 3 = 7
The value after swapping are :
element 1 = 7
element 2 = 5
element 3 = 6
12. Factorial Using Pointers
Write a program in C to find the factorial of a given number using pointers.
Test Data :
Input a number : 5
Expected Output :
The Factorial of 5 is : 120
13. Count Vowels and Consonants Using Pointer
Write a program in C to count the number of vowels and consonants in a string using a pointer.
Test Data :
Input a string: string
Expected Output :
Number of vowels : 1 Number of constant : 5
14. Sort Array Using Pointer
Write a program in C to sort an array using a pointer.
Test Data :
testdata
Expected Output :
Test Data :
Input the number of elements to store in the array : 5
Input 5 number of elements in the array :
element - 1 : 25
element - 2 : 45
element - 3 : 89
element - 4 : 15
element - 5 : 82
Expected Output :
The elements in the array after sorting : element - 1 : 15 element - 2 : 25 element - 3 : 45 element - 4 : 82 element - 5 : 89
15. Function Returning a Pointer
Write a C program to demonstrate how a function returns a pointer.
Test Data :
Input the first number : 5
Input the second number : 6
Expected Output :
The number 6 is larger.
16. Sum of Array Using Pointers
Write a program in C to compute the sum of all elements in an array using pointers.
Test Data :
Input the number of elements to store in the array (max 10) : 5
Input 5 number of elements in the array :
element - 1 : 2
element - 2 : 3
element - 3 : 4
element - 4 : 5
element - 5 : 6
Expected Output :
The sum of array is : 20
17. Print Array in Reverse Using Pointer
Write a program in C to print the elements of an array in reverse order.
Test Data :
Input the number of elements to store in the array (max 15) : 5
Input 5 number of elements in the array :
element - 1 : 2
element - 2 : 3
element - 3 : 4
element - 4 : 5
element - 5 : 6
Expected Output :
The elements of array in reverse order are : element - 5 : 6 element - 4 : 5 element - 3 : 4 element - 2 : 3 element - 1 : 2
18. Pointers to Structures
Write a program in C to demonstrate the use of pointers to structures.
Expected Output :
John Alter from Court Street
19. Pointer to a Union
Write a program in C to show a pointer to a union.
Expected Output :
Jhon Mc Jhon Mc
20. Pointer to an Array of Pointers to Structures
Write a program in C to show a pointer to an array whose contents are pointers to structures.
Expected Output :
Exmployee Name : Alex Employee ID : 1002
21. Print Alphabets Using Pointer
Write a program in C to print all the alphabets using a pointer.
Expected Output :
The Alphabets are : A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
22. Print String in Reverse Using Pointer
Write a program in C to print a string in reverse using a pointer.
Test Data :
Input a string : w3resource
Expected Output :
Pointer : Print a string in reverse order : ------------------------------------------------ Input a string : w3resource Reverse of the string is : ecruoser3w
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