帮我看看我的完数c++程序 不能运行！

可以運行呀~~
只是遞歸后你a都不对等于sum,所以没有打印变量a

#include<iostream>
using namespace std;
int main ()
{   
    int a,b,c,sum;  
    for(a=1;a<=1000;a=a+1)   
    { sum=0;                        
                     for(b=1;b<a;b=b+1)                          
                          {                                          
                              c=a%b;                                         
                              if(c==0)                                         
                              sum=sum+b;
                          }                             
                           if(a==sum)                           
                           {
                               cout<<a<<"的因子是：";     
                               for(int i=1;i<a;i++)
                                  if(a%i==0)
                                      cout<<i<<"  ";
                                  cout<<endl;
                           }
  
  }  
    return 0;
}

因为如果在for 循环内，每次循环开始时 sum=0；而在外面sum就是  +了b后的值；