A C programming problem 20

Is it called 0th or 1st position next to s2? This is better explained.

Function: Insert the character linked list t after the ith element of the character linked list s.

The index of a linked list element starts at 0.

void insert(str s, str t, int i)str temp1;

while(i != 0)

s = s->next;

if(null == s)return;

i--;temp1 = s->next;In this case, you need to insert t t after s, and record the original content after s.

str temp2 = t;Record t.

while(t->next != null) to the tail of t.

t = t->next;

t = temp1;Attach the original content behind s to the back of t.

s->next = temp2;Insert t.

The new C standard allows variables to be declared in the middle of functions.

Variables cannot be defined during function runtime. str temp2=t;You put this statement at the beginning of the function.

while(i!=1){s=s->next;

i--;You run like this and it's completely disrupted. It's best to save it before using it. Return when you run out.

C does not support defining variables in the middle of a function, so be sure to put the statement defining the variable at the beginning of the function.

Can I remove the head pointer like this? This linked list ......

typedef struct node{

char data;

struct node *next;

l,* str;

str insert(str s,str t,int i)str temp1,temp2;

temp1=s;

while(i!=1)

temp1=temp1->next;

i--;temp2=temp1->next;

temp1->next=t;

while(t->next)

t=t->next;

t->next=temp2;

return s;