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Write a function perfect that determines whether a number is a perfect number or not. This function should receive a number and return true if the number is perfect and false otherwise. Use this function in a program that determines and prints all the perfect numbers between 1 and 1000. Print the divisors of each perfect number to confirm that the number is indeed perfect as shown in the sample output below.

An integer is said to be a perfect number if the sum of its divisors, including 1 (but not the number itself), is equal to the number. For example, 6 is a perfect number, because 6 = 1 + 2 + 3.
I try to code but not run...check it once my code

#include <iostream.h>
#include <conio.h>

int perfectNumber(int);
int main()
{
clrscr();
cout<<"this progame will print all the perfect numbers\n\n";
for(short v=2;v<=1000;v++)
if(perfectNumber(v))
{
cout<<v<<" factors are:";
for(short c=1;c<v;c++)
if(v%c==0)
cout<<c<<" ";
cout<<endl;
}
getch();
return 0;
}

int perfectNumber(int num)
{
int sum=0, r;
for(short v=1;v<num;v++)
{
r=num%v;
if(r==0)
sum=sum+v;
}
if(sum==num)
return 1;
return 0;
}
Jan 5 '10 #1
3 4787
weaknessforcats
9,208 Recognized Expert Moderator Expert
It runs for me.

Why do you say it doesn't run for you?
Jan 5 '10 #2
newb16
687 Contributor
Doesn't run for me because of clrscr().
Jan 5 '10 #3
weaknessforcats
9,208 Recognized Expert Moderator Expert
Did it compile and link?
Jan 6 '10 #4

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