If a number is exactly equal to the sum of its true factors, this number is called "complete number".

For example, 6=1+2+3. Program to find all the numbers within 1000

#include <stdio.h>

int Is_wdata(int n)
{
    
    
  int i = 0;
  int sum = 1;            //每个数都含有因子1
  for (i = 2; i < n; i++) //获取（除去1和本身）其他因子
  {
    
    
    if (n % i == 0) //判断是否为因子
    {
    
    
      sum = sum + i; //求真因子之和
    }
  }
  return sum;
}

int main()
{
    
    
  int i = 0;
  int k = 0;
  for (i = 2; i < 1000; i++)
  {
    
    
    k = Is_wdata(i);
    if (i == k)
      printf("%d ", i);
  }

  return 0;
}

Calculation result