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Abstract

Since C++ properties such as char's, int's, float's, doubles and pointers are left uninitialised by the C++ compiler, it makes sense to prefer property types whose values are initialised to definite values. If not, then the values of these properties will be undefined (i.e. random values depending on the current values of the data at those memory locations) if you attempt to use these values before they are set. This article is an alternative to an earlier article.

1. Introduction

Here is a definition of the safe_int class that is intended to replace int properties.

class safe_int
{
public:
   int v;
   safe_int()
   {
      v = 0;
   }
   safe_int(int v)
   {
      this->v = v;
   }
   operator int() const
   {
      return this->v;
   }
};

To do an operation like ++ you need to use access the v property. For example if you have the following definition:

safe_int x;

The you need to write the following code to increment this value:

(x.v)++