### Example of an Explicitly Defined Template Function

The following explicitly defined template function compares two strings and returns a value indicating whether more than 5 % of the characters differ between the two strings:

    #include <string.h>
    int approximate(char *first, char *second)
    {
          if (strcmp(first,second) == 0)
                return 1; // strings are identical

          double difct=0;
          int maxlen=0;

          if (strlen(first)>strlen(second))
                maxlen=strlen(first);

          else maxlen=strlen(second);
          for (int i=0; i<=maxlen ; ++i)
                if ( first[i] != second[i] ) difct++;
          return int((difct / maxlen) <= .05  );
    }

Given this definition, the function call: approximate("String A","String B"); invokes the explicitly defined function above, and no template function is generated.