4_20.cpp

a programme set to teach you how to use c

# include <iostream.h>
void main()
{
    static	int k[20];
	int i,j,n,s,m;
	cout<<"请输入要寻找完数的范围：";
	cin>>m;
	for (j=2;j<=m;j++)
	{
		n=0;
		s=j;
		for (i=1;i<j;i++)
		{
			if((j%i)==0)
			{
				n++;
				s=s-i;
				k[n]=i;
			}
		}
	    if (s==0)
		{
	    	cout<<j<<"是一个完数,它的因子是：";
	    	for (i=1;i<=n;i++)
		    	cout<<k[i]<<"  ";
		        cout<<endl;
		}
	}
}