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  1. #include <cstdio>
  2.  
  3. constexpr char __char__( int x, int i )    {return (( char * )&x)[ i ];}
  4.  
  5. int main()
  6. {
  7.     int a=0x61626364;
  8.     char b = __char__(a,1); // wyliczane podczas kompilacji!
  9.  
  10.     char tab[b];
  11.     printf("%c == %i\n", b, sizeof(tab)/sizeof(char));
  12.  
  13.     return 0;
  14. }
Success #stdin #stdout 0s 3296KB
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stdin
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Standard input is empty
stdout
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c == 99
https://ideone.com/gxyshE
language:
C++14 (gcc 8.3)
created:
12 years ago
visibility:
public

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