题解 | 数位之和
数位之和
https://www.nowcoder.com/practice/5e85cc26475449648e668aa98e92d05b
#include<stdio.h>
#include<math.h>
int b(int n)
{
if(n<10)
return n;
return n%10+b(n/10);
}
int main()
{
int n, a;
scanf("%d", &n);
a = b(abs(n));
printf("%d", a);
}
递归法