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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. #define ROWS 5
  5. #define COLUMNS 5
  6.  
  7. typedef char Row[COLUMNS];
  8.  
  9. int compareVertical(const void *a, const void *b)
  10. {
  11.     return (*(Row *)a)[0] - (*(Row *)b)[0];
  12. }
  13.  
  14. int compareHorizon(const void *a, const void *b)
  15. {
  16.     return *(char *)a - *(char *)b;
  17. }
  18.  
  19. int main()
  20. {
  21.     char arr[ROWS][COLUMNS] = {
  22.         "ebacd",
  23.         "olmkn",
  24.         "fghij",
  25.         "xywuv",
  26.         "trpqs"};
  27.  
  28.     qsort(arr, ROWS, sizeof(Row), compareVertical);
  29.  
  30.     for (int row = 0; row < ROWS; ++row)
  31.     {
  32.         qsort(arr[row], COLUMNS, sizeof(char), compareHorizon);
  33.     }
  34.  
  35.     for (int row = 0; row < ROWS; ++row)
  36.     {
  37.         for (int column = 0; column < COLUMNS; ++column)
  38.         {
  39.             printf("%c", arr[row][column]);
  40.         }
  41.         printf("\n");
  42.     }
  43.  
  44.     return 0;
  45. }
Success #stdin #stdout 0s 4512KB
comments (?)
stdin 
Standard input is empty
stdout 
abcde
fghij
klmno
pqrst
uvwxy
https://ideone.com/b7rvQh
language:
C (gcc 8.3)
created:
6 years ago
visibility:
public

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