F-5

// To check the give number is armstrong or not using functions
#include <stdio.h>
#include <math.h>
int count(int num)
{
int temp=num;
int count1=0;
    while(num!=0)
    {
        num=num/10;
        count1++; 
    }
    return count1;
}

int armstrong(int z,int num)
{
    int s=0;
    while(num!=0)
    {
        int n1=num%10;
        s=s+pow(n1,z);
        num=num/10;
    }
    return s;
}
int main()
{
    int num;
    printf("Enter the number: ");
    scanf("%d",&num);
    int z=count(num);
    printf("No of digits: %d\n",z);
    if(armstrong(z,num)==num)
    {
        printf("Armstrong number");
    }
    else
    {
        printf("Not an armstrong number");
    }
}