Thursday, 24 March 2016

C Program to Check Prime or Armstrong Number Using Function

#include <stdio.h>

int prime(int n);
int armstrong(int n);

int main()
{
    char c;
    int n,temp=0;
    printf("Eneter a positive integer: ");
    scanf("%d",&n);
    printf("Enter P to check prime and  A to check Armstrong number: ");
    c=getche();
    if (c=='p' || c=='P')
    {
        temp=prime(n);
        if(temp==1)
           printf("\n%d is a prime number.", n);
        else
           printf("\n%d is not a prime number.", n);
    }
    if (c=='a' || c=='A')
    {
        temp=armstrong(n);
        if(temp==1)
           printf("\n%d is an Armstrong number.", n);
        else
           printf("\n%d is not an Armstrong number.",n);
    }
    return 0;
}

int prime(int n)
{
    int i, flag=1;
    for(i=2; i<=n/2; ++i)
    {
       if(n%i==0)
       {
          flag=0;
          break;
       }
    }
    return flag;
}

int armstrong(int n)
{
    int num=0, temp, flag=0;
    temp=n;
    while(n!=0)
    {
        num+=(n%10)*(n%10)*(n%10);
        n/=10;
    }
    if (num==temp)
       flag=1;
    return flag;
}

Output:-

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Ghanendra Yadav

Ghanendra Yadav

Hello, I Am Ghanendra Yadav Owner of This Blog, I am professional Blogger and Programmer. I Love Programming, Logo Making, And Banner Designing. My Highest Qualification is MCA From NIT Warangal. You Can Find Me On Social Media Through Below Link And If You Have Any Query Related To Programming And Other Subject Comment Below or You Can Mail Me I Will Try To Answer Within 24 Hours Email:- yghanendra@student.nitw.ac.in

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