//编程找出1000以内的所有完数：include <stdio.h> void main(){ int x, i, sum;x = 1;while(x <= 1000) { //x要从1到1000循环.sum = 0; //每算一个新的x时，sum要清0 for(i = 1; i < x; i++) if(x % i == 0) sum += i; //如果i是x的因子，sum加...