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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <string.h>
  4.  
  5. typedef struct Seito
  6. {
  7.     int num;
  8.     char lname[20];
  9.     char fname[20];
  10.     int point;
  11. } Seito;
  12.  
  13. typedef struct Cell
  14. {
  15.     void* car;
  16.     struct Cell* cdr;
  17. } Cell;
  18.  
  19. typedef struct SortResult
  20. {
  21.     int count;
  22.     Cell* cell;
  23. } SortResult;
  24.  
  25. void destroy_cell(Cell* cell)
  26. {
  27.     Cell* a;
  28.     while (cell != NULL)
  29.     {
  30.         a = cell;
  31.         cell = cell->cdr;
  32.         free(a->car);
  33.         free(a);
  34.     }
  35. }
  36.  
  37. Cell* loadData_(FILE* f)
  38. {
  39.     int num;
  40.     char lname[20];
  41.     char fname[20];
  42.     int point;
  43.     Cell* head = NULL;
  44.     Cell* tail = NULL;
  45.     Cell* cell = NULL;
  46.     int success = 1;
  47.     Seito* seito = NULL;
  48.  
  49.     while (fscanf(f, "%d%s%s%d", &num, lname, fname, &point) != EOF)
  50.     {
  51.         success = 0;
  52.  
  53.         seito = malloc(sizeof(Seito));
  54.         if (seito != NULL)
  55.         {
  56.             seito->num = num;
  57.             strcpy(seito->lname, lname);
  58.             strcpy(seito->fname, fname);
  59.             seito->point = point;
  60.  
  61.             cell = malloc(sizeof(Cell));
  62.             if (cell != NULL)
  63.             {
  64.                 cell->car = seito;
  65.                 cell->cdr = NULL;
  66.                 if (tail == NULL)
  67.                 {
  68.                     tail = cell;
  69.                     head = cell;
  70.                 }
  71.                 else
  72.                 {
  73.                     tail->cdr = cell;
  74.                     tail = cell;
  75.                 }
  76.                 success = 1;
  77.             }
  78.         }
  79.         if (!success)
  80.         {
  81.             break;
  82.         }
  83.     }
  84.     if (success)
  85.     {
  86.         return head;
  87.     }
  88.     else
  89.     {
  90.         free(seito);
  91.         destroy_cell(head);
  92.         return NULL;
  93.     }
  94. }
  95.  
  96. Cell* loadData()
  97. {
  98.     Cell* cell = NULL;
  99.     FILE* f = fopen("seito.dat", "r");
  100.     if (f != NULL)
  101.     {
  102.         cell = loadData_(f);
  103.         fclose(f);
  104.     }
  105.     return cell;
  106. }
  107.  
  108. SortResult* sort(Cell* cell, int (*cmp)(Cell*, Cell*))
  109. {
  110.     SortResult* result = malloc(sizeof(SortResult));
  111.     if (result != NULL)
  112.     {
  113.         Cell* h = cell;
  114.         Cell* c = NULL;
  115.         Cell* n = NULL;
  116.         int count = 0;
  117.  
  118.         if (h != NULL)
  119.         {
  120.             cell = h->cdr;
  121.             h->cdr = NULL;
  122.             while (cell != NULL)
  123.             {
  124.                 n = cell->cdr;
  125.                 count++;
  126.                 if (cmp(cell, h) <= 0)
  127.                 {
  128.                     cell->cdr = h;
  129.                     h = cell;
  130.                 }
  131.                 else
  132.                 {
  133.                     c = h;
  134.                     while (c->cdr != NULL)
  135.                     {
  136.                         count++;
  137.                         if (cmp(cell, c->cdr) <= 0)
  138.                         {
  139.                             cell->cdr = c->cdr;
  140.                             c->cdr = cell;
  141.                             break;
  142.                         }
  143.                         c = c->cdr;
  144.                     }
  145.                 }
  146.                 cell = n;
  147.             }
  148.         }
  149.         result->count = count;
  150.         result->cell = h;
  151.     }
  152.     return result;
  153. }
  154.  
  155. int bigToSmall(Cell* x, Cell* y)
  156. {
  157.     Seito* x1 = x->car;
  158.     Seito* y1 = y->car;
  159.     if (x1->point < y1->point)
  160.     {
  161.         return 1;
  162.     }
  163.     else if (x1->point > y1->point)
  164.     {
  165.         return -1;
  166.     }
  167.     else
  168.     {
  169.         return 0;
  170.     }
  171. }
  172.  
  173. int main(void)
  174. {
  175.     Seito* seito;
  176.     Cell* cell;
  177.     SortResult* result;
  178.     Cell* head = loadData();
  179.     if (head != NULL)
  180.     {
  181.         result = sort(head, bigToSmall);
  182.         if (result != NULL)
  183.         {
  184.             head = result->cell;
  185.             cell = head;
  186.             printf("%4s %-20s %s\n", "番号", "氏名", "得点");
  187.             while (cell != NULL)
  188.             {
  189.                 seito = cell->car;
  190.                 printf("%d %-10s%-10s%3d\n", seito->num, seito->lname, seito->fname, seito->point);
  191.                 cell = cell->cdr;
  192.             }
  193.             printf("整列の為の比較回数=%d回\n", result->count);
  194.             free(result);
  195.         }
  196.         destroy_cell(head);
  197.     }
  198.     return 0;
  199. }
  200.  
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https://ideone.com/iQn4zq
language:
C (gcc 8.3)
created:
11 years ago
visibility:
public

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