## Sunday, July 23, 2006

### Printing Armstrong numbers from 1 to 500.

Write a program to print out all Armstrong numbers between 1 and 500.
If sum of cubes of each digit of the number is equal to the number itself,
then the number is called an Armstrong number.
For example,
153 = (1*1*1) + (5*5*5) + (3*3*3)

#include<stdio.h>
main()
{
int number, temp, digit1, digit2, digit3;

printf("Printing all Armstrong numbers between 1 and 500:\n\n");

number = 001;

while (number <= 500)
{
digit1 = number - ((number / 10) * 10);

digit2 = (number / 10) - ((number / 100) * 10);

digit3 = (number / 100) - ((number / 1000) * 10);

temp = (digit1*digit1*digit1) + (digit2*digit2*digit2) + (digit3*digit3*digit3);

if (temp == number)
{
printf("\nAmstrong Number:%d", temp);

}

number++;
}
}

The file can be found at:

Anonymous said...

Hi Great... We can find the answers but upto 3 digits(999) only!..........Jai..

FAROOQUE said...

Ya, Thanks for that!

But what about numbers above 999????

durgesh said...

hey thanks good and easy programing

Anonymous said...

Is armstrong no only valid for 3 digits?

sonal said...

Is armstrong no only valid for 3 digits?

savitha said...

m confused wid d def of armstrong... pls let me kno..

SHAKEER said...
This comment has been removed by the author.
SHAKEER said...

(C# Code)

long n, q, r, s, i;
Console.WriteLine("Enter the Number :"); n = Convert.ToInt64(Console.ReadLine());//Printf("enter the Number.");Scanf("%d",&n);
for (i = 0; i <= n; i++)
{ q = i;
s = 0;
while (q > 0)
{ r = q % 10;
s = s + r * r * r;
q = q / 10;
}
if (i == s)
Console.WriteLine("\n"+i+"\n");//This line says to Print 'i' to get desired Reuslt.

check with this program and revert to me on sshakeerbaig@yahoo.com,sshakeerbaig@gmail.com.

Anonymous said...

I m not getting that how r v defining these digits 1,2,3....plz explain !!!

Anonymous said...

#include
#include
#include
void main()
{
int i=100,n,b,s;
clrscr();
for(i;i<=999;i++)
{
s=0;
n=i;

while(n>0)
{
b=n%10;
s=s+b*b*b;
n=n/10;
}
if(s==i)
{
printf("%d\n",s);
}

}

getch();
}

Anonymous said...

use "for looping" insted of while to find ans above 999

Anonymous said...

thanks

Abhishek D. said...

#include
#include
#include
void main()
{
long int a=1,b,c,d=1,e,f=0;
clrscr();
while(d<=20)
{
b=0;
f=0;
c=a;
do
{
c=c/10;
f++;
}
while(c>0);
c=a;
while(c>0)
{
e=c%10;
b=b+pow((double)e,(double)f);
c=c/10;
}
if(b==a)
{
printf("\n%ld",a);
d++;
a++;
}
else
{
a++;
}
}
getch();
}

Abhishek D. said...

1st include is stdio.h
2nd include is conio.h
3rd include is math.h

foram said...

void main()
{
int start,end,i,d,temp,sum=0;
clrscr();
printf("\n Enter number of start and end:");
scanf("%d%d",&start,&end);
printf("\n Armstrong no.are:");
for(i=start;i<=end;i++)
{
temp=i;
sum=0;
do
{
d=temp%10;
sum=sum+d*d*d;
temp=temp/10;
}while(temp!=0);
if(i==sum)
{
printf("%d",i);
}
getch();
}

zip said...

I HAVE A GOOD C PROGRAM VIA WHICH U CAN FIND ANY ARMSTRONG NO WITHIN INT RANGE....

AND THATS MUCH SIMPLE THAN THE GIVEN ABOVES!!!!!

zip said...

use a for loop 4 counting the digits and then in pow use pow(r,c)..

then it will generate all the armstrongs no withing int range..

4 generation use a while loop at d beggining...

simple.......

prashant said...

#include
main()
{
int i,n,r,sum;

for(i=1;i<=500;i++)
{
n=i;
sum=0;
while(n>=1)
{
r=n%10;
sum=sum + r*r*r;
n=n/10;
}

if(sum==i)
printf("%d \n",i);
}
}

vaishali s said...

this is just complicating a simple program

Anonymous said...

everybody who posts their codes should execute them and post it. there are some blunders in codes.

george harrison said...

for(int a=1;a<=999;a++)
{
num1=a/100;
num2=(a%100)/10;
num3=(a%10);
temp=(num1*num1*num1)+(num2*num2*num2)+(num3*num3*num3);
if(a==temp)
printf("%a is an armstrong number",a);
}

v.rakesh krishnan said...

if anyone cums to know to print exact first 20amstrong no means....pls let me know

shubh said...

thanxx

Sumesh Patrawal said...

#include
#include
int armstrong(int a);
int main()
{
int i,z;
for(i=0;i<=499;i++)
{
z=armstrong(i);
if(z==1)
printf("%d is armstrong \n",i);
}
getch();
}

int armstrong(int a)
{
int b,n,n1,result=0;
b=a;
while(b>0)
{
n1=b%10;
result=result+n1*n1*n1;
b=b/10;
}
if(result==a)
return 1;
else
return 0;
}

Rudra d great said...

easy one......

#include
#include

int main()
{
int a,b=0,sum=0,c,d;
printf("ENTER A NUMBER:-");
scanf("%d",&a);
c=a;
while(a>0)
{
b=a%10;
a=a/10;
sum= (b*b*b) + sum;
}
if(sum==c)
printf("armstrong no....");
else
printf("not armstrong");
getch();
return 0;
}

sakura said...

i think cube is for three digits and square for two digits and something like dat...

Anonymous said...

But the first one is to simple.gr8

Anonymous said...

Armstrong numbers are the sum of their own digits to the power of the number of digits. As that is a slightly brief wording, let me give an example:

153 = 1³ + 5³ + 3³

Hence, the program should display nos. from 0-9 also.

sakthivel said...

int a = int.Parse(textBox1.Text);
while (a > 0)
{
j = a % 10;
s = s + (j * j * j);
a = a / 10;

}
if (s==int.Parse(textBox1.Text))
{
MessageBox.Show("Armstrong");
}
else
{
MessageBox.Show("Not a Armstrong");
}

shah bhaumik said...

to get for upto 3 digit you enter s=s+r*r*r*r;

shah bhaumik said...

upto 3 digit num...
enter s=s+r*r*r*r;

Priti said...

But Y did u use if statement?

Aarav_iitd said...

My PROGRAMMING FOR ARMSTRONG NUMBERS (TILL 500).... I did it on my own, that too in my First attempt.... Yippeee....!!!
AARAV KOTHARI (IIT Delhi)

Here we go-

#include
#include
void main()
{
int n,m,l,k,p,a;
printf("ARMSTRONG NUMBERS (1-500)-\n\n1\n");
n=10;
while(n>=10 && n<=99)
{
l=n%10;
m=n/10;
a=l*l*l+m*m*m;
if(a==n)
{
printf("%d\n",n);
}
n++;
}
n=100;
while(n>=100 && n<=500)
{
l=n%10;
p=n/100;
k=n/10;
m=k%10;
a=l*l*l+p*p*p+m*m*m;
if(a==n)
{
printf("%d\n",n);
}
n++;
}
}

Anonymous said...

#include

Haziq said...

Hello, very nice tutorial.
I have made a similar but somewhat different attempt on my blog.

Anonymous said...

with out if statement can we write,think once.u cannot ...

Amey@Oracle Free Programs and Tutorials said...

hello.thanks best and easy programming tutorial giving one of the most useful techniques here as publicly

Anonymous said...

Armstrong Defination Wrong

{prog1999} said...

Program to check if a umber is an armstrong number or not...aNY NUMBER OF DIGITS.......GREAT PROGRAM BY {prog1999} (for GW Basic)-------

10 cls
20 input n:n1=n
30 while n<>0
40 D=N mod 10:S=S+d^3
50 n=int(n/10)
60 wend
70 IF S=N1 THEN PRINT "ARMSTRONG_NUMBER_FOUND" ELSE PRINT "ARMSTRONG_NUMBER_NOT_FOUND"
80 END

Anonymous said...

There are only 4 armstrong numbers
152,370,371,407

SAIF said...

Why does the program shows 1 also as an armstrong number?

SAIF said...

Tried this condition in if statement it worked,

if(temp==number && number!=1);

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