数据结构-链表的实现

xiaoxiao2025-07-18  10

今天小编在这分享一段数据结构中线性表实现的源码,希望能帮到各位。 #include<stdio.h> #include<malloc.h> struct node{ //定义相应的结构体; int data; struct node *pnext; }; struct node *phead = NULL;//定义·一个头结点指针的全局变量,方便以后调用! void createHeadNode(); void createNewNode(struct node *phead); void showList(struct node *phead); int main(){ createHeadNode(); createNewNode(phead); showList(phead); return 0; } void createHeadNode(){//给头节点分配空间; phead = (struct node *)malloc(sizeof(struct node)); phead->pnext = NULL;//防止野指针的出现; if (!phead){ printf("分配空间错误,头节点创建失败!\n"); return; } } void createNewNode(struct node *phead){//添加新的结点; struct node *phead1 = phead; struct node *pnew = NULL; for (int i = 0; i < 5; i++){ pnew = (struct node*)malloc(sizeof(struct node)); if (!pnew){ printf("分配空间错误,新节点创建失败!\n"); } else{ pnew->data = i;//为了方便测试,直接把data给写死; pnew->pnext = NULL; phead1->pnext = pnew;//通过头指针连接各个结点; phead1 = phead1->pnext;//头指针后移,始终保证它在最后一个节点上! } } } void showList(struct node *phead){//打印链表的各个结点; struct node *phead2 = phead->pnext; while (phead2 != NULL){ printf("%d ", phead2->data); phead2 = phead2->pnext; } }
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