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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 top 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: 17

Output: not prime number

Input: 57

Output: prime number


3) Palindrome number

Write a c++ program to check palindrome number.

Input: 121

Output: not palindrome number

Input: 113

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: 371

Output: armstrong

Input: 342

Output: not armstrong


6) Sum of Digits

Write a c++ program to print sum of digits.

Input: 23

Output: 5

Input: 624

Output: 12


7) Reverse Number

Write a c++ program to reverse given number.

Input: 234

Output: 432


8) Swap two numbers without using third variable

Write a c++ program to swap two numbers without using third variable.

Input: a=5 b=10

Output: a=10 b=5


9) Matrix Multiplication

Write a c++ program to print multiplication of 2 matrices.

Input:

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

Output:

multiplication of the matrix:
14 9 8
14 9 8
14 9 8

10) Decimal to Binary

Write a c++ program to convert decimal number to binary.

Input: 9

Output: 1001

Input: 20

Output: 10100


11) Alphabet Triangle

Write a c++ program to print alphabet triangle.

Output:

     A
    ABA
   ABCBA
  ABCDCBA
 ABCDEDCBA

12) Number Triangle

Write a c++ program to print number triangle.

Input: 7

Output:

enter the range= 6
      1
     121
    12321
   1234321
  123454321
 12345654321

13) 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		

14) Number in Characters

Write a c++ program to convert number in characters.

Input: 74254

Output:Seven Four Two Five Four

Input: 203

Output: two zero three




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