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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <time.h>
  4.  
  5. int I(int k)
  6. {
  7.     return k%3+2*((k/3)%2)*(1-k%3);
  8. }
  9.  
  10. int J(int k)
  11. {
  12.     return k/3;
  13. }
  14.  
  15. void sort(int M[4][4])
  16. {
  17.     for(int b = 0, e = 11; b != e; ++b)
  18.         for(int k = e, j = k--; j != b; j = k--)
  19.             if (M[I(j)][J(j)] < M[I(k)][J(k)])
  20.             {
  21.                 int t = M[I(j)][J(j)];
  22.                 M[I(j)][J(j)] = M[I(k)][J(k)];
  23.                 M[I(k)][J(k)] = t;
  24.             }
  25. }
  26.  
  27. int main()
  28. {
  29.     srand(time(0));
  30.     int A[4][4];
  31.     for(int i = 0; i < 4; ++i)
  32.         for(int j = 0; j < 4; ++j)
  33.             A[i][j] = rand()%20;
  34.  
  35.     for(int i = 0; i < 4; ++i)
  36.     {
  37.         for(int j = 0; j < 4; ++j) printf("%2d ",A[i][j]);
  38.         puts("");
  39.     }
  40.     puts("");
  41.     puts("");
  42.  
  43.     sort(A);
  44.  
  45.     for(int i = 0; i < 4; ++i)
  46.     {
  47.         for(int j = 0; j < 4; ++j) printf("%2d ",A[i][j]);
  48.         puts("");
  49.     }
  50.  
  51. }
  52.  
Success #stdin #stdout 0s 5632KB
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stdin
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Standard input is empty
stdout
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12 10  5 17 
 5  5 14 17 
11  3  6 17 
17  2 19  0 


 3 10 11 17 
 5  6 12 17 
 5  5 14 17 
17  2 19  0
https://ideone.com/hM45GK
language:
C (gcc 8.3)
created:
4 years ago
visibility:
public

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