?? xmachar.cpp
字號:
#include <iostream>
#include <iomanip>
#include <limits>
#include "nr.h"
using namespace std;
typedef DP T;
// Driver for routine machar
int main(void)
{
int ibeta,iexp,irnd,it,machep,maxexp,minexp,negep,ngrd;
DP eps,epsneg,xmax,xmin;
NR::machar(ibeta,it,irnd,ngrd,machep,negep,iexp,minexp,maxexp,
eps,epsneg,xmin,xmax);
cout << setw(9) << " " << setw(15) << left << "machar";
cout << setw(15) << "numeric_limits" << endl << endl;
cout << "ibeta = " << setw(15) << ibeta;
cout << setw(15) << numeric_limits<T>::radix << endl;
cout << "it = " << setw(15) << it;
cout << setw(15) << numeric_limits<T>::digits << endl;
cout << "irnd = " << setw(15) << irnd;
switch (numeric_limits<T>::round_style) {
case -1: cout << setw(20) << "indeterminate" << endl;
break;
case 0: cout << setw(20) << "round toward zero" << endl;
break;
case 1: cout << setw(20) << "round to nearest" << endl;
break;
case 2: cout << setw(20) << "round toward infty" << endl;
break;
case 3: cout << setw(20) << "round toward -infty" << endl;
}
cout << "ngrd = " << setw(15) << ngrd << endl;
cout << "machep = " << setw(15) << machep << endl;
cout << "negep = " << setw(15) << negep << endl;
cout << "iexp = " << setw(15) << iexp << endl;
cout << "minexp = " << setw(15) << minexp;
cout << setw(15) << numeric_limits<T>::min_exponent-1 << endl;
cout << "maxexp = " << setw(15) << maxexp;
cout << setw(15) << numeric_limits<T>::max_exponent << endl;
cout << scientific << setprecision(6);
cout << "eps = " << setw(15) << eps;
cout << setw(15) << numeric_limits<T>::epsilon() << endl;
cout << "epsneg = " << setw(15) << epsneg << endl;
cout << "xmin = " << setw(15) << xmin;
cout << setw(15) << numeric_limits<T>::min() << endl;
cout << "xmax = " << setw(15) << xmax;
cout << setw(15) << numeric_limits<T>::max() << endl;
return 0;
}
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