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         Debug("Sizeof double is %u", sizeof(double));
  23         Debug("Sizeof ParanoidNumber* %u", sizeof(ParanoidNumber*));
  24
  25         string token("");
  26         cin >> token;
  27         ParanoidNumber a(token.c_str());
  28         double da = a.ToDouble();
  29         float fa = da;
  30         while (cin.good())
  31         {
  32                 char op;
  33                 cin >> op;
  34                 token = "";
  35                 for (char c = cin.peek(); cin.good() && !iswspace(c); c = cin.peek())
  36                 {
  37                         if (c == '+' || c == '-' || c == '*' || c == '/')
  38                         {
  39                                 break;
  40                         }
  41                         token += c;
  42                         c = cin.get();
  43                 }
  44                 Debug("String is %s", token.c_str());
  45                 float fb = strtof(token.c_str(), NULL);
  46                 double db = strtod(token.c_str(), NULL);
  47                 ParanoidNumber b(token.c_str());
  48                 Debug("b is {%s} %lf", b.Str().c_str(), b.ToDouble());
  49                 switch (op)
  50                 {
  51                         case '+':
  52                                 a += b;
  53                                 fa += fb;
  54                                 da += db;
  55                                 break;
  56                         case '-':
  57                                 a -= b;
  58                                 fa -= fb;
  59                                 da -= db;
  60                                 break;
  61                         case '*':
  62                                 a *= b;
  63                                 fa *= fb;
  64                                 da *= db;
  65                                 break;
  66                         case '/':
  67                                 a /= b;
  68                                 fa /= fb;
  69                                 da /= db;
  70                                 break;
  71                 }
  72
  73                 Debug("a is: %s", a.Str().c_str());
  74                 Debug("a as double: %.40f\n", a.ToDouble());
  75                 Debug("a as float: %.40f\n", a.ToFloat());
  76                 Debug("a as int64_t: %ld\n", a.Convert<int64_t>());
  77                 Debug("floats give: %.40f\n", fa);
  78                 Debug("double gives: %.40f\n", da);
  79
  80
  81         }
  82 }