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