Added asDouble method to ZString.

ZString.cpp

@@ -1,6 +1,7 @@
 #include "ZString.h"
 #include "Log.h"
 #include "Exception.h"
+#include <stdlib.h>
 #include <iostream>
 
 namespace coreutils {
@@ -106,6 +107,10 @@ namespace coreutils {
       return tempInt;
    }
 
+   double ZString::asDouble() {
+      return strtod(cursor, &cursor);
+   }
+
    int ZString::incrementCursor(int length) {
       char *temp = cursor;
       if((cursor + length) > (data + this->length))

ZString.h

@@ -128,6 +128,13 @@ namespace coreutils {
       
       int asInteger();
       
+      ///
+      /// Return the floating point  value of the ZString from the cursor to the first
+      /// non-numeric character.
+      ///
+      
+      double asDouble();
+      
       ///
       ///
       ///

testing/zstring_test.cpp

@@ -4,6 +4,12 @@
 
 int main(int argc, char **argv) {
 
+   // Test floating point reader.
+
+   coreutils::ZString pi("3.14159");
+   double x = pi.asDouble();
+   std::cout << "pi: " << x << std::endl;
+   
    // Test comparison operations.
 
    coreutils::ZString test1("else");