CPP/NAN - Revision history

Anonymous at 20:28, 3 July 2010

2010-07-03T20:28:06Z

Anonymous at 20:27, 3 July 2010

2010-07-03T20:27:47Z

Daviddoria: Created page with '==NAN.cpp== #include #include using namespace std; bool IsNaN(const double a); int main(int argc, char *argv[]) { double a = nume…'

2010-06-23T12:47:40Z

Created page with '==NAN.cpp== <source lang="cpp"> #include <iostream> #include <limits> using namespace std; bool IsNaN(const double a); int main(int argc, char *argv[]) { double a = nume…'

New page

==NAN.cpp==
<source lang="cpp">
#include <iostream>
#include <limits>

using namespace std;

bool IsNaN(const double a);

int main(int argc, char *argv[])
{
double a = numeric_limits<double>::quiet_NaN();

double b = 20;
cout << "Is a NAN? " << a << " " << IsNaN(a) << endl;
cout << "Is b NAN? " << b << " " << IsNaN(b) << endl;
return 0;
}

bool IsNaN(const double a)
{
if(a!=a)
{
return true;
}
return false;
}

</source>

@@ Line 26: / Line 26: @@
    //return false;
-   return a!=a;   <- like that
+   return a!=a;   // <- like that
+}
 </source>

@@ Line 20: / Line 20: @@
 bool IsNaN(const double a)
+{
-   if(a!=a)
+   //if(a!=a)     <- this is already a bool, why not return it ?
+   //{
-    return true;
+  //  return true;
+   //}
-   return false;
+   //return false;
+}
 </source>