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  1. #include <stdio.h>
  2.  
  3. #define REORDER3(b1, b2, b3, a1, a2, a3 )   \
  4. {                                           \
  5.   typeof(a1) _tmp[] = {a1, a2, a3};         \
  6.   b1 = _tmp[0]; b2 = _tmp[1]; b3 = _tmp[2]; \
  7. } while ( 0 )
  8.  
  9. void uintprint3(unsigned *a)
  10. {
  11.     printf("%u %u %u\n", a[0], a[1], a[2]);
  12. }
  13.  
  14.  
  15. void sort3( unsigned int a[3] )
  16. {
  17.     if (a[0] > a[1])
  18.     {
  19.         if (a[1] > a[2])
  20.         {
  21.             REORDER3 (
  22.                 a[0], a[1], a[2],
  23.                 a[2], a[1], a[0]);
  24.             return;
  25.         }
  26.         else
  27.         {
  28.             if (a[0] > a[2])
  29.             {
  30.                 REORDER3 (
  31.                     a[0], a[1], a[2],
  32.                     a[1], a[2], a[0]);
  33.                 return;
  34.             }
  35.             else
  36.             {
  37.                 REORDER3 (
  38.                     a[0], a[1], a[2],
  39.                     a[1], a[0], a[2]);
  40.                 return;
  41.             }
  42.         }
  43.     }
  44.     else
  45.     {
  46.         if (a[1] <= a[2])
  47.         {
  48.             return; //NO REORDER
  49.         }
  50.         else
  51.         {
  52.             if (a[0] <= a[2])
  53.             {
  54.                 REORDER3 (
  55.                     a[0], a[1], a[2],
  56.                     a[0], a[2], a[1] );
  57.                 return;
  58.             }
  59.             else
  60.             {
  61.                 REORDER3 (
  62.                     a[0], a[1], a[2],
  63.                     a[2], a[0], a[1] );
  64.                 return;
  65.             }
  66.         }
  67.     }
  68. }
  69.  
  70. int main(void)
  71. {
  72.     unsigned int a[] = {0, 1, 2};
  73.     unsigned int b[] = {0, 2, 1};
  74.     unsigned int c[] = {1, 2, 0};
  75.     unsigned int d[] = {1, 0, 2};
  76.     unsigned int e[] = {2, 0, 1};
  77.     unsigned int f[] = {2, 1, 0};
  78.     sort3(a); sort3(b); sort3(c); sort3(d); sort3(e); sort3(f);
  79.  
  80.     uintprint3(a);
  81.     uintprint3(b);
  82.     uintprint3(c);
  83.     uintprint3(d);
  84.     uintprint3(e);
  85.     uintprint3(f);
  86.     return 0;
  87. }
Success #stdin #stdout 0s 1832KB
comments (?)
stdin
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Standard input is empty
stdout
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0 1 2
0 1 2
0 1 2
0 1 2
0 1 2
0 1 2
https://ideone.com/pgNECi
language:
C (gcc 8.3)
created:
10 years ago
visibility:
public

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