Thread: Need Help with Armstrong number Program

Hello everyone, im having some problems with a program regarding the Armstrong number. The requirements i have to fill out are:
-Write a program that finds the Armstrong numbers from 0 to a certain number given by the user in the line of commands;
-The program must write these numbers on the screen and in a file at my choice;
-The program must execute in separate functions the following tasks:
i)Receive the number of algarisms of a certain positive integer (which will be the Armstrong number);
ii)Test if a given positive integer is or not an Armstrong number.

I appreciate any help, and here's the program i wrote:
(Don't mind the attached file, i don't if it is working or not so)

Code:

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


int nalgarisms(int p)
{
    int n=0;
    while(p > 0)
    {
        p=p/10;
        ++n;
    }
    return n;
}


int armstrongtest(int p1)
{
    int remainder,result,n,p2,test;
    n=0;
    result=0;
    p2=p1;


    while(p2>0)
    {
        p2=p2/10;
        ++n;
    }


 while(p1 > 0)
 {
     remainder=p1%10;
     resul+=pow(remainder,n);
     p1=p1/10;
 }
 if(p1 == result)
 {
     test=1;
 }
 else
 {
    test=0;
 }
    return test;
}




int main(int argc, char **argv)
{
    int x,i,n;
    FILE *f1;
    f1=fopen("Armstrong.txt","wt");
    i=0;
   while(i<= argv[1])
   {
       n=armstrongtest(i);
       if(n==1)
       {
           x=nalgarisms(i);
           printf("The number %d is an Armstrong number, and it has %d algarisms.\n",i,x);
           fprintf(f1,"%d\n",i);
       }
       ++i;
   }
    fclose(f1);
    return 0;
}