C++ program to check happy number
/*Following program checks whether a number is happy number or not. Happy Number Example: 19. If the number's digits squared and added till we get 1, the number is happy number*/
#include<iostream.h>
#include<math.h>
long func(long);
void main()
{
long a;
cout<<"\tEnter a number\n";
cin>>a;
long y=func(a);
if(y==1)
cout<<"Happy Number";
else
cout<<"Unhappy Number\n";
}
long func(long x)
{
long sum=0,rem;
while(x>0)
{
rem=x%10;
sum=sum+pow(rem,2);
x=x/10;
}
if(sum>10)
func(sum);
else
return sum;
}
OUTPUT:
#include<iostream.h>
#include<math.h>
long func(long);
void main()
{
long a;
cout<<"\tEnter a number\n";
cin>>a;
long y=func(a);
if(y==1)
cout<<"Happy Number";
else
cout<<"Unhappy Number\n";
}
long func(long x)
{
long sum=0,rem;
while(x>0)
{
rem=x%10;
sum=sum+pow(rem,2);
x=x/10;
}
if(sum>10)
func(sum);
else
return sum;
}
OUTPUT:
Armstrong Program in C++
ReplyDeleteArmstrong number is a number that is the sum of its own digits each raised to the power of the number of digits is equal to the number itself.
For example 153 is armstrong number, 132 is not prime number. Armstrong program in c++ is very simple and easy to write.
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