實驗2-4-1 統計各位數字之和是5的數 (20分)

代碼：

int is( int number )
{
 int sum = 0;
 while (number > 0) {
  sum += (number % 10);
  number /= 10;
 }
 if(sum == 5) return 1;
 return 0;
}
void count_sum( int a, int b )
{
 int count = 0, sum = 0, i = 0;
 for (i = a; i <= b; i++)
 {
  if (is(i) == 1) {
   count++;
   sum += i;
  }
 }
 printf("count = %d, sum = %d", count, sum);
}