D.5 数学関数

mathtest.C

#ifdef __FreeBSD__
#include <iostream.h>
#else
#include <iostream>
using namespace std;
#endif

#include <cerrno>
#include <cmath>

int main()
{
  double x;
  cin >> x;
  x = abs(x);
  x = ceil(x);
  x = floor(x);
  x = sqrt(x);
  x = pow(x, x);
  x = pow(x, 3);
  x = cos(x);
  x = sin(x);
  x = tan(x);
  x = acos(x);
  x = asin(x);
  x = atan(x);
  x = atan2(x, x);
  x = sinh(x);
  x = cosh(x);
  x = tanh(x);
  x = exp(x);
  x = log(x);
  x = log10(x);
  cout << x << endl;
  // 次の文で FreeBSD 3.4 では Floating exception 発生!
  x = sqrt(-1);
  if (errno == EDOM)
    cerr << "sqrt()" << endl;
  x = pow(1e+300, 2);
  if (errno == ERANGE)
    cerr << "pow()" << endl;
}