包含二十一个数据结构实验的源代码 创建图的十字链表 #include #include #define NULL 0 struct node { int ltag,rtag; struct node *lchild,*rchild; }; struct vex { int tag; struct node *lchild,*rchild; }; struct graph { struct vex *vexpex; int vexnum,arcnum; }; struct graph insert(struct gra