arrayfunctions

/* Q11 Write a c program to store N multi digit elements in 1 D array then count and print 
    a) total palindrome 
   b) total prime no.
  c) total Armstrong no.
  d) total elements having sum of digits less than 10  
Ex.  123,345,567,121,222,153	



code


#include <stdio.h>
#include <math.h>

// Function to check if a number is palindrome
int isPalindrome(int n) {
    int original = n, reversed = 0;
    while (n > 0) {
        reversed = reversed * 10 + (n % 10);
        n /= 10;
    }
    return original == reversed;
}

// Function to check if a number is prime
int isPrime(int n) {
    if (n <= 1)
        return 0;
    for (int i = 2; i <= sqrt(n); i++) {
        if (n % i == 0)
            return 0;
    }
    return 1;
}

// Function to check if a number is Armstrong
int isArmstrong(int n) {
    int original = n, sum = 0, digits = 0, remainder;
    // Count number of digits
    while (n > 0) {
        digits++;
        n /= 10;
    }
    n = original;
    // Calculate sum of digits raised to the power of number of digits
    while (n > 0) {
        remainder = n % 10;
        sum += pow(remainder, digits);
        n /= 10;
    }
    return original == sum;
}

// Function to get the sum of digits of a number
int sumOfDigits(int n) {
    int sum = 0;
    while (n > 0) {
        sum += n % 10;
        n /= 10;
    }
    return sum;
}

int main() {
    int N, countPalindrome = 0, countPrime = 0, countArmstrong = 0, countSumLessThan10 = 0;
    
    printf("Enter the number of elements (N): ");
    scanf("%d", &N);

    int arr[N];

    // Input array elements
    printf("Enter the %d multi-digit elements:\n", N);
    for (int i = 0; i < N; i++) {
        scanf("%d", &arr[i]);
    }

    // Check each element
    for (int i = 0; i < N; i++) {
        if (isPalindrome(arr[i])) countPalindrome++;
        if (isPrime(arr[i])) countPrime++;
        if (isArmstrong(arr[i])) countArmstrong++;
        if (sumOfDigits(arr[i]) < 10) countSumLessThan10++;
    }

    // Print the results
    printf("\nTotal Palindrome numbers: %d", countPalindrome);
    printf("\nTotal Prime numbers: %d", countPrime);
    printf("\nTotal Armstrong numbers: %d", countArmstrong);
    printf("\nTotal numbers with sum of digits less than 10: %d", countSumLessThan10);

    return 0;
}

*/