Thread: Help please im stuck

Hi guys...having problems with a project...its supposed to add names and email addresses but when i go to add a third it falls over....
Its driving me mental..lol

Code:

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


#define MAX 30
struct custdata * initcd(struct custdata *cdata);
struct node * init(struct node *head);
int menu (void);
struct custdata * getdetails(struct custdata *,struct node *);
struct node * add (struct node*,struct custdata *);
struct node * display (struct node *head);
struct node * sort (struct node *head);
struct node * del (struct node *head);
struct custdata
{
char cname[30];
int numoforders;
};

struct node 
 {
       
 	struct node *next;
 	struct custdata *cdata;
 	
 }arrofpoints[MAX];

int i;

main()
{
int choice;
struct node *head;
struct custdata *cdata;
i = 0;


head = init(head);
cdata = initcd(cdata);


   do
   {
    choice = menu();
       switch(choice)
       {
        case 1 : 
               cdata = getdetails(cdata,head);
               head = add(head,cdata);
               break;
        case 2 :
               head = del(head);
               break;
        case 3 :
               head = display(head);
               break;
        case 4 :
               head = sort(head);
               break;
        case 5 :
               break;
       }
   }while(choice !=5);
 
}

struct node * init(struct node *head)
{
head = NULL;

return head;
}

struct custdata * initcd(struct custdata *cdata)
{
cdata = NULL;
return cdata;
}

struct custdata * getdetails(struct custdata *cdata,struct node *head)
{

  cdata = malloc(100);

          printf("Enter Customer Name to add to record \n");
          scanf("%s",cdata->cname);
		   fflush ( stdin );
          printf("Enter Number of Orders required to add to record \n");
          scanf("%d",&cdata->numoforders);
		   fflush ( stdin );
          return cdata;
 
}




int menu (void) 
{
int choice;

printf("Enter number 1 to add to queue \n");
printf("Enter number 2 to delete from queue \n");
printf("Enter number 3 to display contents \n");
printf("Enter number 4 to sort contents \n");
printf("Enter number 5 to exit program \n");
scanf("%d",&choice);

return choice;

}

struct node * add (struct node *head,struct custdata *cdata)
{


//iterate to last record arrpoints

int z;
z = 0;
  if(head == NULL)
  {


    head=malloc(30);
    head->cdata = cdata;
    head->next = NULL;

  
   arrofpoints[z].cdata = cdata;
   
   z++;
    
     return head;
  }else
   
  {
  

head->next=add(head->next , cdata);

  
  }
}

struct node * display (struct node *head)
{
int j;
  for(j=0; j<=MAX; j++)
  {
   if(arrofpoints[j].cdata !=NULL)
   {
   printf(" Customer Name is : %s \n",arrofpoints[j].cdata->cname);
   printf(" Num of Orders is : %d \n",arrofpoints[j].cdata->numoforders);
   } else {
   printf("End of Information  ! \n");
   return head;
   }
  }



      

  
}

struct node * sort (struct node *head)
{
int z;
int i;
int x;
int value;
 char tempcname[20];
  char tempemail[30];
  int tempnumoforders;

 
  for ( z=0; z<MAX; z++) /*initial for which controls the number of passes and the initial numbering*/
  {
  value=0;
 

 
    for (x=z+1; x<MAX; x++) /*this for loop is always one ahead from the previous for thus controlling numbers to be sorted*/
    {
   //<
      if(arrofpoints[x].cdata != NULL)
      {
     
        
       
     if (strcmp(arrofpoints[z].cdata->cname,arrofpoints[x].cdata->cname)>0)
     {
      printf("in if \n");
     
    strcpy(tempcname,arrofpoints[z].cdata->cname);
    tempnumoforders = arrofpoints[z].cdata->numoforders;
    value=1;
      
           while (value==1) 
           {
      
            strcpy(arrofpoints[z].cdata->cname,arrofpoints[x].cdata->cname);
            arrofpoints[z].cdata->numoforders=arrofpoints[x].cdata->numoforders;
            
            strcpy(arrofpoints[x].cdata->cname,tempcname);
            arrofpoints[x].cdata->numoforders = tempnumoforders;
           
            value=0;
          }
      
    }
    
     
    }   
  } 
}
  
}




struct node * del (struct node *head)
{
char tcname[20];
int i;
int j;
int x;

int index;
int flag;
int flag2;
flag = 0;
flag2 = 0;
j = 0;

index = 0;
printf("Enter the Name of the Person you wish to remove from the list \n");
scanf("%s",tcname);
printf("Checking ..... \n");
  for(x = 0; x<=MAX; x++)
  {
    if(flag == 0)
    {
    if(arrofpoints[x].cdata != NULL)
    {
		printf("is not null \n");
      if(strcmp(arrofpoints[x].cdata->cname,tcname)==0)
      {
      printf("deleting user %s from the system!!\n",tcname);
       arrofpoints[x].cdata = NULL;
      flag =1;
      index = x;
      }else {
      printf("There is no user with the name %s \n",tcname);
      return head;
      }
    
    
      }
    }

  }
  
  if(flag == 1)
  {
   
      for(j = index; j <MAX; j++)
      {
       if(flag2 == 0)
       {
         if(arrofpoints[j+1].cdata!=NULL)
         {
            printf("in sort \n");
         arrofpoints[j].cdata = arrofpoints[j+1].cdata;
         } else {
			 printf("in sort \n");
         printf("All elements re-arranged \n");
         arrofpoints[j].cdata = NULL;
         flag2 =1;
        }
       }
      }
    }


 }

Any ideas appreciated