




C Programs
C programs are frequently asked in the interview. These programs can be asked from basics, array, string, pointer, linked list, file handling etc. Let's see the list of c programs.

1) Fibonacci Series
Write a c program to print fibonacci series without using recursion and using recursion.
Input: 10
Output: 0 1 1 2 3 5 8 13 21 34

2) Prime number
Write a c program to check prime number.
Input: 44
Output: not prime number
Input: 7
Output: prime number

3) Palindrome number
Write a c program to check palindrome number.
Input: 329
Output: not palindrome number
Input: 12321
Output: palindrome number

4) Factorial
Write a c program to print factorial of a number.
Input: 5
Output: 120
Input: 6
Output: 720

5) Armstrong number
Write a c program to check armstrong number.
Input: 153
Output: armstrong
Input: 22
Output: not armstrong

6) Sum of Digits
Write a c program to print sum of digits.
Input: 234
Output: 9
Input: 12345
Output: 15

7) Reverse Number
Write a c program to reverse given number.
Input: 123
Output: 321

8) Swap two numbers without using third variable
Write a c program to swap two numbers without using third variable.
Input: a=10 b=20
Output: a=20 b=10

9) Print "hello" without using semicolon
Write a c program to print "hello" without using semicolon

10) Assembly Program in C
Write a c program to add two numbers using assembly code.

11) C Program without main() function
Write a c program to print "Hello" without using main() function.

12) Matrix Multiplication
Write a c program to print multiplication of 2 matrices.
Input:

first matrix elements:
1 1 1
2 2 2
3 3 3
second matrix elements
1 1 1
2 2 2
3 3 3

Output:

multiplication of the matrix:
6 6 6
12 12 12
18 18 18

13) Decimal to Binary
Write a c program to convert decimal number to binary.
Input: 5
Output: 101
Input: 20
Output: 10100

14) Alphabet Triangle
Write a c program to print alphabet triangle.
Output:

     A
    ABA
   ABCBA
  ABCDCBA
 ABCDEDCBA

15) Number Triangle
Write a c program to print number triangle.
Input: 7
Output:

enter the range= 6
      1
     121
    12321
   1234321
  123454321
 12345654321

16) Fibonacci Triangle
Write a c program to generate fibonacci triangle.
Input: 5
Output:

1
1	1	
1	1	2	
1	1	2	3	
1	1	2	3	5		


17) Number in Characters
Write a c program to convert number in characters.
Input: 5
Output: five
Input: 203
Output: two zero three













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