# include & lt; stdio.h> 
#include  
#include  
Struct node 
{
int num; 
Struct node * next; 
} the node; 
Void main () 
{
Struct node num, * head, * p=head; 
//int ordinal=1, remain=13; 

//set up 13 node 
//logging data in the node num: 
 1 ~ 13
If (p!=NULL) printf (" Not NULL... \n"); 
Printf (" % d ", p - & gt; Num); 
for(int i=0; i<13; I++) 
{
P - & gt; Num=I + 1; 
Printf (" % d ", p - & gt; Num); 
P=p - & gt; next; 
} 

P=NULL; 

Bother everybody to help, thank!

CodePudding user response:

The head is wild pointer

CodePudding user response:

The suspension is to point to? Reference code modifications of the building Lord, generate the lead 13 nodes of the node list, at the same time to deposit 1-13, for reference:

 # include & lt; stdio.h> 
#include  
#include  
Struct node 
{
int num; 
Struct node * next; 
} the node; 
Void main () 
{
Struct node num, * head, * p, * q; 
//int ordinal=1, remain=13; 
//set up 13 node 
//logging data in the node num: 
 1 ~ 13The head=(struct node *) malloc (sizeof (struct node)); 
The head - & gt; Next=NULL; 
Q=head; 
If (q!=NULL) printf (" Not NULL... \n"); 
//printf (" % d ", p - & gt; Num); 
for(int i=0; i<13; I++) 
{
P=(struct node *) malloc (sizeof (struct node)); 
P - & gt; Num=I + 1; 
P - & gt; Next=NULL; 
Q - & gt; Next=p; 
Q=p; 
Printf (" I=% d, % d \ n ", I, p - & gt; Num); 
//p=p - & gt; next; 
} 
Q=head - & gt; next; 
While (q) {
Printf (" % d \ n ", q - & gt; Num); 
Q=q - & gt; next; 
} 
//p=NULL; 
system("pause"); 
}