练习3.2

// test2.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <math.h>

bool getR1(int n);

int main(int argc, char* argv[])
{
?printf("Hello World!\n");
?
?printf("result: %d", getR1(6));
?
?return 0;
}

bool getR1(int n)
{
?int sum=1;

?for(int i=2,l=sqrt(n);i<=l;i++)
?{
??if(0== n%i)
??{
???if(n==i*i)
???{
????sum+=i;
???}
???else
???{
????sum+=i;
????sum+=n/i;
???}
??}
?}

?return sum==n;
}