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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. typedef struct node {
  5.     int val;
  6.     struct node *next;
  7. }Node;
  8.  
  9. Node *head = NULL;
  10.  
  11. Node* createN(int x){
  12.     Node *newnode;
  13.     newnode = (Node *)malloc(sizeof(Node));
  14.     newnode->val = x;
  15.     newnode->next = NULL;
  16.     return newnode;
  17. }
  18.  
  19. void initL(int n){
  20.     int x,i;
  21.     Node *p;
  22.     scanf("%d",&x);
  23.     head = createN(x);
  24.     p = head;
  25.     for(i=1;i<n;i++){
  26.         scanf("%d",&x);
  27.         p->next = createN(x);
  28.         p = p->next;
  29.     }
  30. }
  31.  
  32. void freeL(){
  33.     Node *p;
  34.     while(head!=NULL){
  35.         p = head->next;
  36.         free(head);
  37.         head = p;
  38.     }
  39. }
  40.  
  41. void printL(){
  42.     Node *p = head;
  43.     while(p != NULL){
  44.         printf("%d ",p->val);
  45.         p = p->next;
  46.     }
  47.     printf("\n");
  48. }
  49.  
  50.  
  51. void insMiddle(int n, int x){
  52. 	int i;
  53. 	Node *p,*q;
  54. 	p=head;
  55. 	for(i=1;i<n;i++){
  56. 		p=p->next;
  57. 	}
  58. 	q=createN(x);
  59. 	q->next=p->next;
  60. 	p->next=q;
  61. }
  62.  
  63. void delMiddle(int n){
  64. 	int i;
  65. 	Node *p,*q;
  66. 	p=head;
  67. 	for(i=1;i<n-1;i++){
  68. 		p=p->next;
  69. 	}
  70. 	q=p->next;
  71. 	p->next=q->next;
  72. 	free(q);
  73. }
  74.  
  75. int main(void){
  76.     int i,n,x,y,z;
  77.     scanf("%d",&n);
  78.     initL(n);
  79.     printL();
  80.     scanf("%d",&x,&y);
  81.     insMiddle(x,y);
  82.     printL();
  83.     scanf("%d",&z);
  84.     delMiddle(z);
  85.     printL();
  86.     freeL();
  87.     return 0;
  88. }
Success #stdin #stdout 0s 5284KB
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2
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stdout
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2 4 
2 1164910320 4 
2 1164910320
https://ideone.com/JdVxfF
language:
C (gcc 8.3)
created:
6 days ago
visibility:
public

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