www.pudn.com > zju_1000_1010.rar > 1007_other2.cpp

 #include 
 
 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