题解The Biggest Water Problem
The Biggest Water Problem
https://www.nowcoder.com/practice/435aa556e093463891f6da7d322140a4
#include <stdio.h>
int fun(int n)
{
int sum = 0;
while (n)
{
sum += n % 10;
n /= 10;
}
return sum;
}
int main()
{
int n = 0;
scanf("%d", &n);
while (fun(n)>9)
{
n = fun(n);
}
printf("%d", fun(n));
return 0;
}
