Inventor Pradhap

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How to write Armstrong number in C program

inventorpradhapby 0 comments
How to write Armstrong number in C program

Armstrong number in C program
Armstrong number in C program



#include<stdio.h>
#include<math.h>
int main()
{
	int n,sum =0,digit = 0,copy;
	
	printf("\nEnter the value of n	:	");	/* if entered n is 153*/
	scanf("%d", &n);
	copy = n;
	while(copy>0)
	{
		copy = copy/10;
		digit++;
	}
	copy = n;
	while(copy>0)
	{
		sum  = sum+pow(copy%10,digit);
		copy = copy/10;
	}
	if(sum==n)
	{
		printf("Entered number is an Armstrong Number");
	}
	else
	{
		printf("Entered number is not an Armstrong Number");
		
	}
	return 0;
}

/*	First while loop for count digits
1). copy = n ; copy = 153;
		check 53>0 yes;
		copy = 153/10; = 15;
		digit++ = 1;

	2).	copy = 15;
		check 15>0 yes;
		copy = 15/10; 1;
		digit++ = 2;
		
	3).	copy = 1;
		check 1>0 yes;
		copy = 1/10; = 0;
		digit++ = 3;
	Second while loop for sum and power	
		
	1).	copy = n; copy = 153;
		check 153>0 yes;
		sum = 0+ pow(153%10,3) => 0+ 3^3 = 27;
		copy = 153/10; = 15;
	
	2).
		copy = 15;
		check 15>0 yes;
		sum = 27 + pow(15%10,3) => 27+ 5^3 = 152;
		
	3).
		
		copy = 1;
		check 1>0 yes;
		sum = 152 + pow(1%10,3) => 152 + 1^3 = 153;
	*/

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