» » » Check Armstrong number in c using recursive function

  • Armstrong number is a number which order of n if
  • xyz=x n + y n + z n;
  • To check three digit Armstrong number in c programming
  • 153=13 * 53*33
  • In the same way we can also check four digit Armstrong number
  • 1634=14+64+34+44 is Armstrong  number.
  • Now let us check a four digit number is armstrong or not by using recursive function in c.
  • Armstrong number in c using recursion function.
  • Four digit armstrong number in c. check below program for four digit or n digit armstrong number in c programming.



Program #1: Write a c program to check four / 4 digit number or N digit number is armstrong number or not by using recursive function

  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. int powerfun(int, int);
  5.  
  6. int main()
  7. {
  8.    int n, sum = 0, temp, remainder, digits = 0;
  9.  
  10.    printf("Input number to check Armstrong or not");
  11.    scanf("%d", &n);
  12.  
  13.    temp = n;
  14.    // check the number of digits in given number
  15.    while (temp != 0) {
  16.       digits++;
  17.       temp = temp/10;
  18.    }
  19.  
  20.    temp = n;
  21.  
  22.    while (temp != 0) {
  23.       remainder = temp%10;
  24.       sum = sum + powerfun(remainder, digits);
  25.       temp = temp/10;
  26.    }
  27.  
  28.    if (n == sum)
  29.       printf("%d is an Armstrong number.\n", n);
  30.    else
  31.       printf("%d is not an Armstrong number.\n", n);
  32.  
  33.    getch();
  34. }
  35.  
  36. int powerfun(int num, int r) {
  37.    int c, res = 1;
  38.  
  39.    for (c = 1; c <= r; c++) 
  40.       res = res*num;
  41.  
  42.    return res;   
  43. }

Output:


armstrong number recusrion function c

Instance Of Java

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