c - 图邻接表实现(C)

Question

我正在尝试使用以下定义在 C 中创建图形的相邻 ist 表示...

typedef struct edge
{
    int to_vertex;
    int weight;
} Edge;

typedef struct edgeNode
{
    Edge edge;
    struct edgeNode *next;
} *EdgeNodePtr;

typedef struct edgeList
{
    EdgeNodePtr head;
} EdgeList;

typedef struct graph
{
    int V;
    EdgeList *edges;
} Graph;

创建所有值并将其添加到图表的主要函数是

    int numEdges;
    int edgeToVertex;
    int weight;
    EdgeNodePtr new_node;
    Graph G;

    EdgeNodePtr current;
    int *inDeg;


    scanf("%d", &G.V);
    G.edges = malloc(G.V * sizeof(EdgeList));

    for (int i = 0; i < G.V; i++)
    {
        scanf("%d", &numEdges);
        G.edges[i].head = NULL;


        for (int j = 0; j < numEdges; j++)
        {
            new_node = malloc(sizeof(*new_node));

            scanf("%d,%d", &edgeToVertex, &weight);
            new_node->edge.to_vertex = edgeToVertex;
            new_node->edge.weight = weight;

            new_node->next = G.edges[i].head;
            new_node = G.edges[i].head;

        }
    }

由于某种原因，我似乎无法弄清楚图表不会创建，我已经尝试触发它，它会添加一个节点，但该节点将始终是相同的。感谢任何帮助

Answer 1

这看起来很奇怪:

        new_node->next = G.edges[i].head;
        new_node = G.edges[i].head;

当您用 head 覆盖 new_node 时。

也许你想做:

        new_node->next = G.edges[i].head;
        G.edges[i].head = new_node;

使head指向新节点。