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几行代码ac,纪念下

Posted by seedeed at 2011-03-07 23:42:38 on Problem 1519 
#include "cstdio"

int main()
{
	char buff[1000];
	int sum;
	while(scanf("%s",buff),buff[0]!='0')
	{
		sum=0;
		for(int i=0;buff[i];i++) sum+=buff[i]-'0';
		while(sum>9) sum=sum/10+sum%10;
		printf("%d\n",sum);
	}
	return 0;
}
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