www.pudn.com > duiban.zip > duiban.cpp

#include 
#include 
#include 
 
int sign(long double s) 
{ 
	if(s>=0)  
		return 1; 
	else  
		return -1; 
} 
 
long double ab(long double s) 
{ 
	if(s<0) 
		s=-s; 
	return s; 
} 
 
void main() 
{ 
	long double a=0.0,b=1.0,c=0.0000000000001,u=1.0,x,w; 
	int k=0; 
	do{ 
		x=(a+b)/2; 
		w=cos(2*x)-9.0/4*x; 
		cout<=c); 
}