coding style - C language evolves -

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1) What is the latest version of C language? 2) How is it done by GCC? 3) For an old programmer, what is the main difference of the new language?

I'm asking this because I have learned these days (a new feature) that we actually have a structure like value: 

  struct t {int i; Four c; } S; S = (struct t) {exponent, coefficient};     
   
 Div class = "post-text" itemprop = "text "> 
 The most recent version of C language seems to be C99. The most important IMHO of many changes are:  
     
  •   restricted  indicators  
  •  variable length arrays  
  •  Built-in  
  •  C ++ - style  //  comments   
     is a large list

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