who can help me?

i am doing my assignment, but ...

here is my code:

Code:

#include<stdio.h>
#include<string.h>
#include<stdlib.h>

struct node{
   char* name;
   struct node *next;
   struct node *follow;
};
typedef struct node Node;

Node* newNode(char*);
void Search(char*,char*,char*,Node*);
void print(Node*);

int main(){
  char line[BUFSIZ];
  Node* student=newNode("");

  while(fgets(line,BUFSIZ,stdin)!=NULL){
     char* l= line;
     char person[BUFSIZ]="";
     char* p = person;
     char course[BUFSIZ]="";
     char* c = course;
     char mark[3]="";
     char* m = mark;
     while(isspace(*l)!= 0){
       l++;
     }
     int length = strlen(l);
     char* rLine = strchr(l,' ');
     int rlength = strlen(rLine);
     int i = length - rlength;
     strncpy(p,l,i);  /*name*/
     l += i;
     while(isspace(*l)!=0){
       l++;
     }
     length = strlen(l);
     rLine = strchr(l,' ');
     rlength = strlen(rLine);
     i = length - rlength;
     strncpy(c,l,i);  /*course*/
     l += i;
     while(isspace(*l)!=0){
        l++;
     }
     while(isspace(*l)==0){
       strncpy(m,l,1);
       m++;
       l++;
     }
     m = mark;
     Search(p,c,m,student);
  }
  print(student);
}

Node* newNode(char* name){
    Node* temp;
    temp=(Node*)malloc(sizeof(Node));
    strcpy(temp->name,name);
    temp->next = NULL;
    temp->follow = NULL;
    return temp;
}

void Search(char* person,char* course,char* mark,Node* student){
    Node* ptr = student;
    while(strcmp(person,ptr->name) !=0 && (ptr->next != NULL)){
      ptr = ptr->next;
    }

    if(strcmp(person,ptr->name)==0){
      Node* ptr1 = ptr->follow;
      while(strcmp(course,ptr1->name)!=0&&ptr1->next!=NULL){
          ptr1 = ptr1->next;
      }
      if(strcmp(course,ptr1->name)==0){
         Node* ptr2 = ptr1->follow;
         while(ptr2->next != NULL){
            ptr2 = ptr2->next;
         }
         ptr2->next = newNode(mark);
      }
      else if(ptr1->next == NULL){
         ptr1->next = newNode(course);
         ptr1 = ptr1->next;
         ptr1->follow = newNode(mark);
      }
   }
   else if(ptr->next == NULL){
     ptr->next = newNode(person);
     ptr = ptr->next;
     ptr->follow = newNode(course);
     ptr->follow->follow = newNode(mark);
   }
}

void print(Node* student){
   Node* ptr = student;
   ptr = ptr->next;
   for(ptr;ptr!=NULL;ptr=ptr->next){
      char output[BUFSIZ]="";
      char* out = output;
      strcat(out,ptr->name);
      strcat(out,":");
      Node* ptr1 = ptr->follow;
      for(ptr1;ptr1!=NULL;ptr1=ptr1->next){
        strcat(out,"  ");
        strcat(out,ptr1->name);
        Node* ptr2 = ptr1->follow;
        for(ptr2;ptr2!=NULL;ptr2=ptr2->next){
           strcat(out," ");
           strcat(out,ptr2->name);
        }
      }
      strcat(out,"\n");
      fputs(out,stdout);
   }
}

here is data:
Jane CS1100 A
Art CS1100 D
Meng CS1100 A
Art CS1100 C-
Jane Math1000 B+
Art CS1100 A-
Art Math1000 A
Meng CS1101 A
Art CS1100 B-
Meng CS1101 A+

why i always get Mati1000 instead of Math1000?
and, why strcmp(person, ptr->next) = -1, when person="Art" and
ptr->next="Art"?

thanks

Your function newNode() is wrong. You never allocate any space for name.

>>and, why strcmp(person, ptr->next) = -1, when person="Art" and
ptr->next="Art"?

fgets keeps the '\n' at the end of the string.

Kurt

But, why strcmp(person,ptr->next) = 0, when person="Jane" and ptr->next = "Jane"?
and by the way, how to allocate space for name?

It's going to be a lot easier to get going with

Code:

struct node{
   char name[30];
   struct node *next;
   struct node *follow;
};

You don't have to allocate name, and you can just strcpy in the data when you create each new node.

Later on, changing this to char* is a pretty simple task.