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Check if a number is perfect #68

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25 changes: 25 additions & 0 deletions Perfectnumber.cpp
Original file line number Diff line number Diff line change
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// Cpp Program to check if a number is perfect number
/*a perfect number is a positive integer that is equal to the sum of its positive divisors, excluding the number itself. For instance, 6 has divisors 1, 2 and 3 (excluding itself), and 1 + 2 + 3 = 6, so 6 is a perfect number.*/
#include<iostream>
using namespace std;
int Check_perfect(int n)
{
int i,sum=0;
for(i=1;i<n;i++)
{
if(n%i==0)
sum+=i;
}
if(sum==n)return 1;
return 0;
}
int main()
{
int n;
cout<<"Enter any number:";
cin>>n;
if(Check_perfect(n))
cout<<"It is a perfect number";
else
cout<<"It is not a perfect number";
}