Help with functions

[elmoro15]

this is a code to see if the number entered is an armstrong or not
for example 371 is armstrong because
3^3+7^3+1^3=371
(the cubic summation==the number)
my code give wrong result!!!
please help me

  #include<iostream>
using namespace std;
bool arm(int num);
int main()
{
	int  y;
	cout<<"enter anumber"<<endl;
	cin>>y;
	bool s;
	s=arm(y);
	if(s)
		cout<<"its armstrong"<<endl;
	else
		cout<<"its NOt"<<endl;




	return 0;
}


bool arm(int num)
{

	int x;  int sum=0;

	while(num!=0)
	{
		x=num%10;
		sum=sum+(x*x*x);
		num=num/10;
	}

	if(num==sum)
		return true;
	else
		return false;
}

[Daleth]

You modified your num variable so it no longer carries the original value. The while loop only exits when num == 0; hence your condition becomes:

if( 0 == 371)

I suggest to keep a copy of the original value in another variable.

[elmoro15]

thankss man.. !!!