C语言之链表的基本操作(含代码)
2021/11/27 23:40:14
本文主要是介绍C语言之链表的基本操作(含代码),对大家解决编程问题具有一定的参考价值,需要的程序猿们随着小编来一起学习吧!
head.h
#pragma once #include <stdio.h> #include <stdlib.h> typedef struct number { int digit; struct number *next; }Number, *pNumber; pNumber createNumberInfo(); void insertNumberInfo(pNumber pHead, pNumber pNew, int i);//插入到某个节点 void deleteNumberInfo(pNumber pHead, int i); void displayNuberInfo(pNumber pHead); void freeNumberInfo(pNumber pHead);
list.c
#include "head.h" pNumber createNumberInfo() { pNumber pHead, pTail, pNew; int digit; pHead = (Number*)malloc(sizeof(Number)); if (NULL==pHead) { perror("Phead malloc error"); return NULL; } pHead->next = NULL; pTail = pHead; printf("input a digit\n"); while (1) { scanf("%d", &digit); if (digit < 0) { break; } pNew = (Number*)malloc(sizeof(Number)); if (NULL==pNew) { perror("pNew malloc error"); return 0; } pNew->digit = digit; pTail->next = pNew; pTail = pNew; pTail->next = NULL; } return pHead; } void insertNumberInfo(pNumber pHead, pNumber pNew, int i) { pNumber pCur = pHead; for (int j = 0; j < i-1&&pCur!=NULL; ++j) { pCur = pCur->next; } if (NULL == pCur) { printf("not found\n"); return ; } pNew->next = pCur->next; pCur->next = pNew; } void deleteNumberInfo(pNumber pHead, int i) { pNumber pCur = pHead; pNumber q; if (0 == i) { return ; } for (int j = 0; j < i-1 ; ++j) { pCur = pCur->next; } q = pCur->next; pCur->next = q->next; free(q); q = NULL; } void displayNuberInfo(pNumber pHead) { pNumber pCur = pHead->next; for (; pCur != NULL; pCur = pCur->next) { printf("%d ", pCur->digit); } printf("\n"); } void freeNumberInfo(pNumber pHead) { pNumber pCur = pHead; pNumber q; while (pCur->next != NULL) { q = pCur->next; pCur->next = q->next; free(q); q = NULL; } free(pHead); pHead = NULL; }
main.c
#include "head.h" int main() { pNumber pHead, pTail, pNew; pHead = createNumberInfo(); if (NULL == pHead) { printf("createNumberInfo error\n"); return -1; } printf("after create:"); displayNuberInfo(pHead); pNew = (Number*)malloc(sizeof(Number)); pNew->digit = 0; insertNumberInfo(pHead,pNew,1); displayNuberInfo(pHead); deleteNumberInfo(pHead, 1); displayNuberInfo(pHead); freeNumberInfo(pHead); return 0; }
示例
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