好像是循环的问题但是找不出来

Question

帮忙看看哩！

#include<stdio.h>
#include<stdlib.h>
#include<time.h>
typedef struct Node{
    int data;
    struct Node* next; 
}sqlist;

void Createlistend(sqlist**L,int n){
    sqlist*p,*q;
    int i;
    srand(time(NULL));
    *L=(sqlist*)malloc(sizeof(sqlist));
    q=*L;
    for(i=0;i<n;i++){
        p=(sqlist*)malloc(sizeof(sqlist));
        p->data=rand()%100+1;
        q->next=p;
        q=p;
    }
    q->next=NULL;
}

int Getelem(sqlist* L,int i,int e){
    int j;
    sqlist* p;
    p=L->next;
    j=1;
    while(p&&j<i){
        p=p->next;
        ++j;
    }
    if(!p||j>i) exit(0);
    e=p->data;
    return e;
}
int main(){
    sqlist* L,*p;
    int n,i,k,e;
    scanf("%d",&n);
    Createlistend(&L,n);
    p=L->next;
    i=0;
    while(p&&i<n){
        printf("%d ",p->data);
        p=p->next;
}
printf("\n");
scanf("%d",k);
e=Getelem(L,k,e); 
printf("%d",e);
return 0;
}

Answer 1

修改处见注释，供参考：

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
typedef struct Node{
    int data;
    struct Node* next;
}sqlist;

void Createlistend(sqlist**L,int n){
    sqlist*p,*q;
    int i;
    (*L)=(sqlist*)malloc(sizeof(sqlist));
    (*L)->next = NULL;//修改
    q=(*L);
    for(i=0;i<n;i++){
        p=(sqlist*)malloc(sizeof(sqlist));
        p->next=NULL; //修改
        p->data=rand()%100+1;
        q->next=p;
        q=p;
    }
}

int Getelem(sqlist* L,int i,int e){
    int j;
    sqlist* p;
    p=L->next;
    j=1;
    while(p&&j<i){
        p=p->next;
        ++j;
    }
    if(!p||j>i) return -1; //exit(0);
    e=p->data;
    return e;
}
int main(){
    sqlist* L,*p;
    int n,i,k,e;
    srand(time(NULL));//修改
    scanf("%d",&n);
    Createlistend(&L,n);
    p=L->next;
    //i=0;
    while(p){ // while(p&&i<n) 修改
        printf("%d ",p->data);
        p=p->next;
    }
    printf("\n");
    scanf("%d",&k); //scanf("%d",k);修改
    e=Getelem(L,k,e);
    printf("%d",e);
   
    return 0;
}