鍊錶的面試題

2021-08-19 20:28:44 字數 4819 閱讀 7050

slist.h

#include #include #include typedef int datatype;


typedef struct listnode


node,*pnode;


//生成乙個新結點


pnode buyslistnode(datatype data);


//列印鍊錶


void printslist(pnode phead);


//尾插


void slistpushback(pnode* phead, datatype data);


pnode slistfind(pnode phead, datatype data);


// 逆序列印單鏈表 


void printslistfromtail2head(pnode phead); 


// 刪除鍊錶的非尾結點，要求：不能遍歷鍊錶 


void deletelistnottailnode(pnode pos); 


// 在鍊錶pos位置前插入值到data的結點 


void inesrtposfront(pnode pos, datatype data); 


// 查詢鍊錶的中間結點，要求只能遍歷一次鍊錶 


pnode findmiddlenode(pnode phead); 


// 查詢鍊錶的倒數第k個結點，要求只能遍歷一次鍊錶 


pnode findlastknode(pnode phead, int k); 


// 刪除鍊錶的倒數第k個結點，要求只能遍歷一次鍊錶 


void deletelastknode(pnode phead, int k); 


// 用單鏈表實現約瑟夫環 


void josephcircle(pnode* phead, const int m); 


// 鍊錶的逆置--三個指標 


void reverseslist(pnode* phead); 


// 鍊錶的逆置--頭插法 


pnode reverseslistop(pnode phead); 


// 用氣泡排序思想對單鏈表進行排序 


void bubblesort(pnode phead); 


// 合併兩個有序單鏈表，合併後依然有序 


pnode mergeslist(pnode phead1, pnode phead2); 


// 判斷兩個單鏈表是否相交---鍊錶不帶環 


int isslistcross(pnode phead1, pnode phead2); 


// 求兩個單鏈表相交的交點---鍊錶不帶環 


pnode getcorssnode(pnode phead1, pnode phead2); 


////測試


void testprintslistfromtail2head();


void testdeletelistnottailnode();


void testinesrtposfront();


void testfindmiddlenode();


void testfindlastknodeanddeletelastknode();


void testjosephcircleandreverseslist();


void testmergeslistandgetcorssnode();

slist.c

#include "slist.h"


void printslist(pnode phead)


while(pcur)


printf("null\n");


}void slistinit(pnode* phead)


pnode buyslistnode(datatype data)


pnewnode->data =data;


pnewnode->pnext =null;


return pnewnode;


}void slistpushback(pnode* phead, datatype data)


//鍊錶中有結點


else 


pcur->pnext =buyslistnode(data);	}}


pnode slistfind(pnode phead, datatype data)


while(phead)


phead=phead->pnext ;


}	return null;


}void printslistfromtail2head(pnode phead)


while(pcur)


while(ptail!=phead)


printf("%d->",ptail->data );


ptail=ppre;


}	printf("%d->null",phead->data );


}void deletelistnottailnode(pnode pos)


void inesrtposfront(pnode pos, datatype data)


//如果節點數為偶數返回的是中間數的後乙個


pnode findmiddlenode(pnode phead)


else if(phead->pnext==null )


else


}return slow;


}pnode findlastknode(pnode phead, int k)


while(k--)


while(fast)


return slow;


}void deletelastknode(pnode phead, int k)


while(k--)


while(fast)


pre->pnext =slow->pnext ;


free(slow);


slow=null;


}void josephcircle(pnode* phead, const int m)


//先遍歷鍊錶，讓尾指向頭


while(pcur->pnext )


pcur->pnext =*phead;


pcur=*phead;


//環內只剩乙個元素時停止


while((pcur->pnext) !=pcur)


//刪除節點


del=pcur->pnext ;


pcur->data =del->data ;


pcur->pnext =del->pnext ;


free(del);


del=null;


}	//解環


pcur->pnext =null;


printf("%d\n",pcur->data );


}void reverseslist(pnode* phead)


pcur=*phead;


while(pcur)


*phead=pre;


}pnode reverseslistop(pnode phead)


while(phead)


phead=pcur;


return phead;


}void bubblesort(pnode phead)


pcur=pcur->pnext ;


}		ptail=pcur;


if(flag==0)


break;


}	printslist(phead);


}pnode mergeslist(pnode phead1, pnode phead2)


else if(phead1->data data)


while(phead1&&phead2)


else if((phead1->data )<(phead2->data))


}while(phead1)//判斷phead1節點是否為空，如若不空則繼續


while(phead2)


printslist(newnode);


return newnode;


}int isslistcross(pnode phead1, pnode phead2)


//找到鍊錶的最後乙個結點


while(phead1->pnext )


while(phead2->pnext )


if(phead1 ==phead2 )


return 1;


return 0;


}pnode getcorssnode(pnode phead1, pnode phead2)


while(pcur1)


while(pcur2)


pcur1=phead1;


pcur2=phead2;


gap=size1-size2;


if(gap>0)		}


else		}


while(pcur2!=pcur1)


return pcur1;}//


//測試


void testprintslistfromtail2head()


void testdeletelistnottailnode()


void testinesrtposfront()


void testfindmiddlenode()


void testfindlastknodeanddeletelastknode()


void testjosephcircleandreverseslist()


void testmergeslistandgetcorssnode()

test.c

#include "slist.h"


int main()

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