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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <string.h>
  4. #include <stdlib.h>
  5.  
  6. typedef struct friend
  7. {
  8.     char *name;
  9.     int age;
  10.     char gender;
  11.     struct friend* next;
  12. }friend;
  13.  
  14.  
  15. void node_delete(const char* name, friend* stFriend)
  16. {
  17.     if (!stFriend->next) //end of list
  18.     { 
  19.         printf("%s is not a friend!\n", name);
  20.     }
  21.     else if ( !strcmp(name, stFriend->next->name) ) //name matches! remove link
  22.     {     
  23.         //here's where you can free your unwanted friend ptr ~NB: are you sure this friend is not a friend of someone else?
  24.         //free(stFriend -> next);    
  25.         stFriend->next=stFriend->next->next;
  26.         printf("%s is no longer a friend!\n", name); 
  27.     }
  28.     else //name does not match -recurse
  29.     {
  30.         node_delete(name, stFriend->next);
  31.     }
  32. }
  33.  
  34.  
  35. void print_friends(const friend* pstPerson)
  36. {
  37.     if (pstPerson->next)
  38.     {
  39.         printf("next friend:%s\n", pstPerson->next->name);
  40.         print_friends(pstPerson->next);
  41.     }
  42.     else 
  43.     {
  44.         printf("no more friends :(\n\n");
  45.     }
  46. }
  47.  
  48. int main()
  49. {
  50.     friend stFriend0, stFriend1, stFriend2, stPerson;
  51.     char name[256]={0};
  52.  
  53.     stFriend0.name="amber";
  54.     stFriend0.next=0;
  55.  
  56.     stFriend1.name="betty";
  57.     stFriend1.next=&stFriend0;
  58.  
  59.     stFriend2.name="catherine";
  60.     stFriend2.next=&stFriend1;
  61.  
  62.     stPerson.name="violet";
  63.     stPerson.next=&stFriend2;
  64.  
  65.     printf("%s's friends before:\n", stPerson.name);
  66.     print_friends(&stPerson);
  67.  
  68.     printf("remove a friend: ");
  69.     fgets (name, 256, stdin);
  70.     strtok(name, "\n");
  71.  
  72.     node_delete(name, &stPerson);
  73.  
  74.     printf("\n\n%s's friends after:\n", stPerson.name);
  75.     print_friends(&stPerson);
  76.  
  77.     printf("\n\n\ndone!\n");
  78.  
  79.     return 0;
  80. }
  81.  
Success #stdin #stdout 0s 4436KB
comments (?)
stdin 
betty
stdout 
violet's friends before:
next friend:catherine
next friend:betty
next friend:amber
no more friends :(

remove a friend: betty is no longer a friend!


violet's friends after:
next friend:catherine
next friend:amber
no more friends :(




done!
https://ideone.com/ezAVoK
language:
C (gcc 8.3)
created:
4 years ago
visibility:
secret

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