[gameprogrammer] creating and deleting a class in c++

In my project I have a class that handles text in 3d space. The class have a problem: it cant be created with an empty string, so I initialize it with the entity name. Im planning to rewrite the floating text management, except the class itself that was taken form Ogre wiki to a system that creates the text when required and destroys it when no longer displayed. 
What I want to know is if the following approach is valid:
in Entity class constructor I assign 0 to floatText
in displayText function, if floatText==0, then floatText= new floating text
when text has expired, delete floatText, asign 0 again to floatTExt

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