无权有向图的所有环路(All loops having no right directed graph).docVIP

无权有向图的所有环路(All loops having no right directed graph).doc

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无权有向图的所有环路(All loops having no right directed graph)

无权有向图的所有环路(All loops having no right directed graph) / * Author: Wang Bo Time: Tuesday, November 30, 2010 Description: this procedure generates loops using depth first search of directed graphs, using recursive calls and backtracking. Printlist to verify the input chain function, you can remove. * / #include stdio.h #include stdlib.h Maximum vertex number of #define MAX 100// loop Typedef struct Node { Int index; Node * next; }G; Typedef struct allloop { Int *pl; Int cnt; }ALOOP; ALOOP all[100]; / / loop number / / definition diagram Int vexnum=0; / / vertex number G *graph; Int loop[MAX]; Int, cur=0, cntl=0, loopn=0, //cur loop, current subscript, cntl loop number, loopn loop length Int loopfirst=0; / / the first vertex loop / / function declaration Void DFStraverse (int * visit); Void DFS (int, V, int * visit); Void, Init (); Void CreatGraph (int, from, int, to); Int FirstAdj (int V); Int NextAdj (int, V, int, w); Void, creatloop (); Int, compare (); Int incompare (ALOOP *a); Void, printlist (); Void, printloop (); The main function. Int, main () { Int, I, j; Printf (enter the vertex number: \n); Scanf (%d, vexnum); Int *visited=new int[vexnum]; Init (); While (1) { Printf (enter two numbers (start and end of arc), input less than 0 and end: \n); Scanf (%d%d, i, j); If (i0||j0) Break; Else CreatGraph (I, J); } (printlist); / / output adjacency list, delete the test procedures used. DFStraverse (visited); Printf (\n\n); Printloop (); System (PAUSE); Return 0; } / / initialize Void, Init () { Graph = new G[vexnum]; For (int i=0; ivexnum; i++) { Graph[i].index = i; Graph[i].next=NULL; } } / / structural map Void CreatGraph (int, from, int, to) { If (from 0 || from = vexnum) Return; If (to 0 || to = vexnum) Return; Node * add = new Node; Add-index = to; Add-next = NULL; //add-weight=wt; If (graph[from].next = NULL) Graph[from].next = add; Else { Node * temp = graph[from].next; While (Temp) { If (temp-next = NULL) { Temp-next = add; Break; } Temp = temp-next; }//wh

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