#include<stdio.h>
#include<string.h>
#include<stdlib.h>
int fun(int n);//循环往复,要用递归
int main()
{
int t, i, sum = 0;
char st[1000005];//题目所给数据超级大,所以不应使用long long,而应考虑字符串
scanf("%d", &t);
getchar();
while (t--)
{
gets(st);
for (i = 0; st[i]; i++)
sum += st[i] - '0';
printf("%d\n", fun(sum));
sum = 0;
}
return 0;
}
int fun(int n)
{
int sum = 0;
if (n / 10 == 0)
return n;
else
{
while (n != 0)
{
sum += n % 10;
n /= 10;
}
fun(sum);
}
}
D. calc the sum
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转载自blog.csdn.net/weixin_43911865/article/details/85267790
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