單鏈表的增刪改查

#include

#include
#include
typedef
int data_t;
typedef
struct node   /*定義結點*/
node;
typedef
struct list  /*定義表結構*/
llt;
/*增刪改查函式宣告*/
intcreate_list
(llt *
*pplist)
;//建立鍊錶
intdestory_list
(llt *
*pplist)
;//銷毀鍊錶
intinsert_elem
(llt *plist,
int index,data_t newdata)
;//插入
intprint_list
(llt *plist)
;//遍歷
intdelete_elem
(llt *plist,
int index)
;//刪除
intreplace_elem
(llt *plist,
int index,data_t rdata)
;//替換
/****************主函式**********************/
intmain()
}destory_list
(&plist)
;    plist =
null
;return0;
}/**********************函式************************/
/*建立鍊錶*/
intcreate_list
(llt *
*pplist)
*pplist =
(llt *
)malloc
(sizeof
(llt));
if((*pplist)
==null
)memset
(*pplist,0,
sizeof
(llt));
(*pplist)
->phead =
null;(
*pplist)
->ptial =
null;(
*pplist)
->len =0;
return0;
}/*銷毀鍊錶*/
intdestory_list
(llt *
*pplist)if(
(*pplist)
->phead !=
null)}
free
(*pplist)
;*pplist =
null
;return0;
}/*插入*/
intinsert_elem
(llt *plist,
int index,data_t newdata)
if(index <
0|| index > plist->len)
node *p =
(node *
)malloc
(sizeof
(node));
p->data = newdata;
if(index ==
0&& plist->len ==0)
else
if(index ==
0&& plist->len !=0)
else
if(index >
0&& index < plist->len)
p->pnext = ptmp->pnext;
ptmp->pnext = p;
}else
if(index == plist->len)
plist->len +=1
;return0;
}/*遍歷*/
intprint_list
(llt *plist)
node *ptmp = plist->phead;
while
(ptmp)
puts(""
);return0;
}/*刪除*/
intdelete_elem
(llt *plist,
int index)
if(index > plist->len || index <0)
node *p = plist->phead;
if(index ==0)
free
(p);
}else
if(index >0)
if(index == plist->len-1)
if(index != plist->len-1)
}    plist->len -=1
;return0;
}/*replace*/
intreplace_elem
(llt *plist,
int index,data_t rdata)
if(index <
0|| index > plist->len)
int i;
node *p = plist->phead;
for(i =
0;i < index;i++
)    p->data = rdata;
return0;
}

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