Programming Support: C Practice

I. Operators

Program to find sum of two numbers without using '+' operator.
Program to find sum of two numbers without using arithmetic operator.
Program to find largest number among two without using relational operators.
Program to find second largest number among three numbers without using relation operators.
Program to check whether the number is even or odd without using '%' operator.
Program to swap two numbers without using temporary variable.
Program to swap two numbers without using temporary variable and arithmetic operators.
Program to check whether the number is even or odd using bit-wise operator.
Program to count number of bits set.
Program to double the given number without using '*' operator.

II. if-else

Program to find largest number between two numbers.
Program to find largest number between three numbers.
Program to find second largest number between three numbers.
Program to check whether the given number is positive, negative or zero.
Program to print wishes according to the time given in hours.
Program to check whether given alphabet is vowel or consonant.
Program to check whether given character is alphabet, digit or symbol.
Pogram to check given year is leap year or not.
Program to input marks of five subjects Physics, Chemistry, Biology, Mathematics and Computer. Calculate percentage and grade according to following:
Percentage >= 90% : Grade A
Percentage >= 80% : Grade B
Percentage >= 70% : Grade C
Percentage >= 60% : Grade D
Percentage >= 40% : Grade E
Percentage < 40% : Grade F
Program to input basic salary of an employee and calculate its Gross salary according to following:
Basic Salary <= 10000 : HRA = 20%, DA = 80%
Basic Salary <= 20000 : HRA = 25%, DA = 90%
Basic Salary > 20000 : HRA = 30%, DA = 95%
Program to find minimum number of denominations for given amount.

III. Switch

Program to read a single digit number and print in words.
Program to display number of days in a given month.
Program to perform simple calculator operation.
Program to check number is even or odd using switch.
Program to find largest number between two numbers using switch

IV. Loops

Program to print 'Hello' 5 times.
Program to print natural numbers from 1 to N.
Program to print natural numbers from 1 to N without using looping statements.
Program to find sum of N natural numbers without using arrays.
Program to display multiplication table of a given number.
Program to count number of digits of a given number.
Program to find sum of digits of a given number.
Program to find reverse of a given number.
Program to check whether given number is palindrome or not.
Program to find factorial of given number.
Program to check whether a number is prime or not.
Program to print Fibonnaci series upto n-terms
Program to compute and display the sum of the following series up to n-terms:
X – X/2 + X/3 – X/4 +…
Program to compute and display the sum of the following series up to n-terms:
(1*2)/(1+2) + (1*2*3)/(1+2+3) + … + (1*2*3*…*n)/(1+2+3+…+n)

V. Arrays

Program that calculate the fractions of its elements that are positive, negative and zeros.
Sample Input:
8
-3 -2 -1 0 0 1 2 3
Sample Output:
0.375
0.25
0.375
Explanation:
Number of positive elements / total elements = 3/8 = 0.375
Number of zero elements / total elements = 2/8 = 0.25
Number of negative elements / total elements = 3/8 = 0.375
Program to insert an element at given position in array.
Sample Input:
5
10 20 30 40 50
2
25
Sample Output:
10 20 25 30 40 50
Explanation:
n = 5
arr[] = {10,20,30,40,50}
pos = 2
newelement = 25
New Array after insertion is {10,20,25,30,40,50}
Program to delete an element from an array at specified position.
Sample Input:
5
10 20 30 40 50
2
Sample Output:
10 20 40 50
Explanation:
n = 5
arr[] = {10,20,30,40,50}
Position to be delete 2
New Array after element delete {10,20,40,50}
Program to reverse of array elements.
Sample Input:
5
10 20 30 40 50
Sample Output:
50 40 30 20 10
Program to remove duplicates in array.
Sample Input:
6
1 2 3 2 4 2
Sample Output:
1 2 3 4
Program to count the frequency of each element of an array.
Sample Input:
6
1 2 3 2 4 2
Sample Output:
1 1
2 3
3 1
4 1
Program to sort the elements in array.
Sample Input:
5
3 4 2 5 1
Sample Output:
1 2 3 4 5
Explanation:
Arrange the array elements in ascending order.
Program to find second smallest and second largest numbers from array.
Sample Input:
8
4 6 1 5 2 7 3 8
Sample Output:
2 7
Program for left rotate of array.
Sample Input:
6
1 2 3 4 5 6
2
Sample Output:
3 4 5 6 1 2
Explanation:
n = 6
arr[] = {1,2,3,4,5,6}
After first left rotation, arr[] becomes {2,3,4,5,6,1} and after the second rotation, arr[] becomes {3,4,5,6,1,2}
Program to find duplicate element in k-distance. If found print "YES" otherwise "NO".
Sample Input1:
8
1 2 3 4 1 2 3 4
3
Sample Output1:
NO
Explanation:
Each element in the given array arr[] appears twice and the distance between every element and its duplicate is 4.
Sample Input2:
6
1 2 3 2 4 5
3
Sample Output2:
YES
Explanation:
2 is present at index 1 and 3.

VI. Strings

Program to count the number alphabets, digits and symbols in a String.
Sample Input: 8+8+8 is daily time management strategy
Sample Output: 29 3 7
Explanation: In the given String, Number of alphabets are 29, digits are 3 and symbols are 7.
Program to find the frequency of characters in a string(case insensitivity).
Sample Input:
helloHowarEyou?
Sample Output:
h - 2
e - 2
l - 2
o - 3
w - 1
a - 1
r - 1
y - 1
u - 1
? - 1
Program to swap cases in the given String.
Sample Input: Hello Govardhan1206
Sample Output: hELLO gOVARDHAN1206
Explanation: In the given String, if a character is in uppercase convert it into lowercase and vice-versa.
Program to remove special characters from string.
Sample Input:
Training programs @ 4 placements
Sample Output:
Trainingprogramsplacements
Explanation: From the given string remove spaces, @ and 4 because their are not alphbets.
Program to find the length of the longest word in a string.
Sample Input: Hello Govardhan How are you?
Sample Output: 9
Explanation: In the given String, substring Govardhan is longest string its length is 9.
Program to find duplicate words in a string.
Sample Input:
where there is a will there is a way
Sample Output:
there
is
a
Explanation: Duplicate words in the specified string: there, is and a
Program to find number of words having non-repeating characters.
Sample Input:
where there is a will there is a way
Sample Output:
5
Program to reverse of individual words in the given string.
Sample Input:
Hello developers how are you
Sample Output:
olleH srepoleved woh era uoy
Program to find highest frequency character in the given string.
Sample Input:
hello developer how are you?
Sample Output:
e 5
Program to replace a substring with another string in the given string.
Sample Input:
hello world how are you
world
developer
Sample Output:
hello developer how are you