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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. #define RES 5
  5.  
  6. struct A {
  7.     int x;
  8.     int y;
  9. };
  10.  
  11. struct vector_a {
  12.     struct A* tab;
  13.     size_t len;
  14.     size_t cap;
  15. };
  16.  
  17. void init(struct vector_a*);
  18. void resize(struct vector_a*);
  19. void add(struct vector_a*, struct A);
  20. void display(struct vector_a*);
  21. void clean(struct vector_a*);
  22.  
  23. int main()
  24. {
  25.  
  26.     struct vector_a v;
  27.     struct A a[3] = {{10, 12}, {11, 3}, {8, 9}};
  28.     int i;
  29.     init(&v);
  30.     for(i = 0; i < 3; ++i) {
  31.         add(&v, a[i]);
  32.     }
  33.     display(&v);
  34.     clean(&v);
  35.     printf("\n\n");
  36.     add(&v, a[1]);
  37.     display(&v);
  38.     clean(&v);
  39.     return 0;
  40. }
  41.  
  42. void init(struct vector_a* v) {
  43.     v->tab = NULL;
  44.     v->len = 0;
  45.     v->cap = 0;
  46.     resize(v);
  47. }
  48.  
  49. void resize(struct vector_a* v) {
  50.     if(!v->tab) {
  51.         v->tab = (struct A*)malloc(RES*sizeof(struct A));
  52.         v->cap = RES;
  53.     } else {
  54.         v->tab = (struct A*)realloc(v->tab, (RES+v->cap)*sizeof(struct A));
  55.         v->cap += RES;
  56.     }
  57. }
  58.  
  59. void add(struct vector_a* v, struct A a) {
  60.     if(!(v->cap-v->len)) {
  61.         resize(v);
  62.     }
  63.     v->tab[v->len++] = a;
  64. }
  65.  
  66. void display(struct vector_a* v) {
  67.     int i;
  68.     for(i = 0; i < v->len; ++i) {
  69.         printf("%d\t%d\n", v->tab[i].x, v->tab[i].y);
  70.     }
  71. }
  72.  
  73. void clean(struct vector_a* v) {
  74.     free(v->tab);
  75.     memset(v, 0, sizeof(struct vector_a));
  76. }
Success #stdin #stdout 0s 1920KB
comments (?)
stdin
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Standard input is empty
stdout
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10	12
11	3
8	9


11	3
https://ideone.com/SpbxUP
language:
C (gcc 8.3)
created:
11 years ago
visibility:
public

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