#include<stdio.h>

void main()
{
	long double sum = 0.0,num=0.0;
	double k = 0.0;
	int  i= 1;
	int mod = 10;
	int base = 2<<2;

	while(scanf("%lf",&num))
	{
	while(num - int(num)>0.00000001)
	{
		num = num*10;
		k = int(num) %mod;
		sum += k/double(base);
		base=base<<3;
		
		k = 0.0;
	}
	printf("%.30lf\n",sum);
	}
}
如何才能保证输出的位数达到要求呢？

• Re:这个代码如何改才能正确，跪请赐教？ (434) frkstyc 2006-03-30 14:57:03
• 好像"%lf"的只能输出小数点后16位吧 (0) Gchris 2006-12-18 23:24:39