基本功练习_2_24_4之水仙花数

输出10000以内水仙花数：

# include <stdio.h>
int main(void)
 {
  int i;
  int m, k = 1, sum =0, j, count =0,n,a;
  for(i=1;i<10000;i++)
  {
   n=a=i;
  while(a!=0)
  {
   a /= 10;
   count++;
  }
   while(n!=0)
  {
   j=n%10;
   n /= 10;
   for(m=0;m<count;m++)
   k *=j;
   sum += k;
   k=1;
  } 
  
  if(sum== i && count>=3)
  printf("%d\n",i);
  
  sum =0;
  count =0;
  }
  
  return 0;
 }

判断一个数是否为水仙花数：

# include <stdio.h>
int main(void)
 {
  int i;
  printf("请输入数值：i=");
  scanf("%d", &i);
  int m, k = 1, sum =0, j, count =0,n,a;
  n=a=i;
  while(i!=0)
  {
   i /= 10;
   count++;
  }
  
   while(n!=0)
  {
   j=n%10;
   n /= 10;
   for(m=0;m<count;m++)
   k *=j;
   sum += k;
   k=1;
  } 
  
  if(sum == a && count>=3)
  printf("i是水仙花数\n");
  else
  printf("i不是水仙花数\n");
  
  return 0;
 }