src/tests/paranoidcalculator.cpp

   1 #include "main.h"
   2 #include "real.h"
   3 #include <cmath>
   4 #include <cassert>
   5 #include <list>
   6 #include <bitset>
   7 #include <iostream>
   8 #include <cfloat>
   9 #include <fenv.h>
  10 #include "paranoidnumber.h"
  11
  12 using namespace std;
  13 using namespace IPDF;
  14
  15 int main(int argc, char ** argv)
  16 {
  17         Debug("FLT_MAX = %.40f", FLT_MAX);
  18         Debug("FLT_MIN = %.40f", FLT_MIN);
  19         Debug("FLT_EPSILON = %.40f", FLT_EPSILON);
  20         Debug("Sizeof ParanoidNumber::digit_t is %u", sizeof(ParanoidNumber::digit_t));
  21         Debug("Sizeof ParanoidNumber is %u", sizeof(ParanoidNumber));
  22
  23         string token("");
  24         cin >> token;
  25         ParanoidNumber a(token.c_str());
  26         double da = a.ToDouble();
  27         float fa = da;
  28         while (cin.good())
  29         {
  30                 char op;
  31                 cin >> op;
  32                 token = "";
  33                 for (char c = cin.peek(); cin.good() && !iswspace(c); c = cin.peek())
  34                 {
  35                         if (c == '+' || c == '-' || c == '*' || c == '/')
  36                         {
  37                                 break;
  38                         }
  39                         token += c;
  40                         c = cin.get();
  41                 }
  42                 Debug("String is %s", token.c_str());
  43                 float fb = strtof(token.c_str(), NULL);
  44                 double db = strtod(token.c_str(), NULL);
  45                 ParanoidNumber b(token.c_str());
  46                 Debug("b is {%s} %lf", b.Str().c_str(), b.ToDouble());
  47                 switch (op)
  48                 {
  49                         case '+':
  50                                 a += b;
  51                                 fa += fb;
  52                                 da += db;
  53                                 break;
  54                         case '-':
  55                                 a -= b;
  56                                 fa -= fb;
  57                                 da -= db;
  58                                 break;
  59                         case '*':
  60                                 a *= b;
  61                                 fa *= fb;
  62                                 da *= db;
  63                                 break;
  64                         case '/':
  65                                 a /= b;
  66                                 fa /= fb;
  67                                 da /= db;
  68                                 break;
  69                 }
  70
  71                 Debug("a is: %s", a.Str().c_str());
  72                 Debug("a as double: %.40f\n", a.ToDouble());
  73                 Debug("floats give: %.40f\n", fa);
  74                 Debug("double gives: %.40f\n", da);
  75
  76
  77         }
  78 }