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  1. #include <stdio.h>
  2. #include <string.h>
  3. #include <stdlib.h>
  4.  
  5. static long double array[] = {
  6.     0.304411824158121,
  7.     0.702270983146229,
  8.     0.675987113307883,
  9.     0.652289676782947,
  10.     0.975411752562938,
  11.     0.284802741036713,
  12.     0.877898595240810,
  13.     0.726726914957288,
  14.     0.084725908720116,
  15.     0.946546040643011 };
  16.  
  17. static void rev_array( void *array, size_t nelem, size_t width )
  18. {
  19.     size_t i = 0, j;
  20.     char *data = ( char * )array;
  21.     char *tmp = malloc( width );
  22.  
  23.     for( i = 0, j = nelem - 1; i < j; i++, j-- ) {
  24.         memcpy( tmp, data + j * width, width );
  25.         memcpy( data + j * width, data + i * width, width );
  26.         memcpy( data + i * width, tmp, width );
  27.     }
  28.     free( tmp );
  29. }
  30.  
  31. static void print_array( long double *array, size_t size )
  32. {
  33.     size_t i;
  34.     for( i = 0; i < size; i++ ) {
  35.         printf( "%.15Lf\n", array[i] );
  36.     }
  37. }
  38.  
  39. int main()
  40. {
  41.     print_array( array, sizeof( array ) / sizeof( array[0] ) );
  42.     rev_array( array, sizeof( array ) / sizeof( array[0] ), sizeof( array[0] ) );
  43.     printf( "---\n" );
  44.     print_array( array, sizeof( array ) / sizeof( array[0] ) );
  45.     return 0;
  46. }
  47.  
Success #stdin #stdout 0s 2300KB
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stdin
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Standard input is empty
stdout
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0.304411824158121
0.702270983146229
0.675987113307883
0.652289676782947
0.975411752562938
0.284802741036713
0.877898595240810
0.726726914957288
0.084725908720116
0.946546040643011
---
0.946546040643011
0.084725908720116
0.726726914957288
0.877898595240810
0.284802741036713
0.975411752562938
0.652289676782947
0.675987113307883
0.702270983146229
0.304411824158121
https://ideone.com/BLRIY2
language:
C (gcc 8.3)
created:
7 years ago
visibility:
public

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