提供以下代码.
Fedora10下gcc4.3.2编译通过,手动测试通过.
#include
#include
#define DEFAULT_UPPER (10)
#define DEFAULT_LOWER (-10)
#define DEFAULT_E (0.00000001)
#define _MID(x,y) ((x+y)/2)
#define _VALUE(x) (2*x*x*x-4*x*x+3*x-6)
double _e;
int getRoot(double lower,double upper,double *result);
main()
{
double root;
printf("Enter a deviation:");
scanf("%lf",& _e);
if(_e == 0.0)
_e = DEFAULT_E;
if(getRoot(DEFAULT_LOWER,DEFAULT_UPPER,&root))
printf("Root:%2.8lf\n",root);
else
printf("Root:No Solution.\n");
}
int getRoot(double lower,double upper,double *result)
{
*result = _MID(lower,upper);
if(upper - lower