1007_other2.cpp

ACM1000_1010竞赛的赛题,源码

 #include<stdio.h>

 int main()
 {
	double k;
	long n=2000;
	double sum,res;
	double pd1=1.0;
	double pd2=0.25;
	double pd3=(double)1.0/18;
	long i,j;
	for(i=0;i<2001;i++)
	{       sum=0.0;

		double x=i*0.001;
		for(j=1;j<n;j++)
		{
			k=j;
			sum+=double(1.0)/(k*(k+1)*(k+2)*(k+3)*(k+x));
		}
		res=(3.0-x)*sum;
		res=(2.0-x)*(pd3+res);
		res=(1.0-x)*(pd2+res);
		res=res+pd1;
		printf("%5.3f %16.12f\n", x, res);
	}
	return 0;
 }