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  1. #include "mygraph.h"
  2. #include <cstddef>
  3. #include <iostream>
  4. using namespace std;
  5.  
  6. node* build_graph(int n)
  7. {
  8.     node* p;
  9. 	p = new node[n];
  10. 	for(int i=0;i<n;i++)
  11. 	{
  12. 		p[i].next = NULL;
  13. 		p[i].index = i;
  14. 	}	
  15. 	cout<<"make graph complete\n";
  16. 	return p;
  17. }
  18. void graph_connect(node* graph,int a,int b)
  19. {
  20. 	//connect node a and node b (a,b are index)
  21. 	node* p;
  22. 	p = graph[a].next;
  23. 	while(p!=NULL)
  24. 	{
  25. 		p = p->next;
  26. 		if(p->index==b)
  27. 		{
  28. 			return;		//already connected
  29. 			cout<<"already connect\n";
  30. 		}
  31. 	}
  32. 	p = new node;
  33. 	p->index = b;
  34. 	p->next = NULL;
  35. 	cout<<"connect!\n";
  36. }
  37.  
  38.  
  39. void show_graph(node* graph,int n)
  40. {
  41. 	for(int i=0;i<n;i++)
  42. 	{
  43. 		cout<<graph[i].index;
  44. 		node* p = graph[i].next;
  45. 		while(p!=NULL)
  46. 		{
  47. 			cout<<" -> "<< p->index;
  48. 			p = p->next;
  49. 		}
  50. 		cout<<endl;
  51. 	}
  52. }
  53.  
  54. bool query_connect(node* graph,int a, int b)
  55. {
  56. 	node* p = graph[a].next;
  57. 	while(p!=NULL)
  58. 	{
  59. 		if(p->index == b)
  60. 			return true;
  61. 		else
  62. 			p = p->next;
  63. 	}
  64. 	return false;
  65. }
  66.  
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https://ideone.com/s4Ezft
language:
C++14 (gcc 8.3)
created:
12 years ago
visibility:
public

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