Help!Help!I must finish my assignment today!!

This is a discussion on Help!Help!I must finish my assignment today!! within the C Programming forums, part of the General Programming Boards category; My assignment must be submitted tommorow, but there are still some problems during compile........Anybody can help me?? The project is ...

  1. #1
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    Arrow Help!Help!I must finish my assignment today!!


    My assignment must be submitted tommorow, but there are still some problems during compile........Anybody can help me??

    The project is about a ticket information system. If you give the start city and the destination, then the system will give back a serial number. Then if you want to check the ticket information, you can enter the serial number and get it. The personal information of the traveller will be stored in a tree data type (ADT type).

    This is the main programme
    Attached Files Attached Files

  2. #2
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    Continued

    the implementations
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  3. #3
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    continued....

    the fatal errors
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  4. #4
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    continued.......

    the header file of the tree.
    Attached Files Attached Files
    • File Type: h tree.h (606 Bytes, 85 views)

  5. #5
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    The problems

    when i compile it
    the information showed:
    38¡A39¡A40 ,73,74,75¡Gdereferencing pointer to incomplete type

  6. #6
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    you forgot some files.

    in void create(SearchTree T, int num) you use alot of gets, use fgets. im not sure if the compiler minds all those newlines but i do...

    in int check(char cityi[], char tmp[]) you have
    return 1;
    break;
    why use that break if that function is over right after the return 1?

    while (status != 1);
    the ';' should be a { so it actually does something.

    it doesnt look that bad, im still not sure if it will compile. try the other files. or maybe something isnt extern-ed.

  7. #7
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    im guesing you did something like "char *ptr;" and set it equal to a int. the pointer needs to know what type its pointung to, i scew that up a couple times.

  8. #8
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    i just noticed, why did you make more threads just to upload the files? you could of just held select.

  9. #9
    S Sang-drax's Avatar
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    Originally posted by mart_man00

    while (status != 1);
    the ';' should be a { so it actually does something.
    No! You should study the do-while loop.
    Last edited by Sang-drax : Tomorrow at 02:21 AM. Reason: Time travelling

  10. #10
    &TH of undefined behavior Fordy's Avatar
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    All your threads have been merged by me.

    If you want to reply, click "Post Reply" dont start new thread

  11. #11
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    Would you please figure out the problem

    Code:
    #include "tree.h"
    #include <stdio.h>
    #include <string.h>
    #include "fatal.h"
    
    void
    getinfo(const char sn[], SearchTree T)
    {
      Position P;
      char city[21][10] = {"Beijing", "Chengdu", "Chongqing", "Changsha", "Changchun", "Dalian", "Fuzhou", "Guiyang", "Guiling", "Hangzhou", "Haikou", "Harbin", "Hefei", "Jinan", "Kunmin", "Lasa", "Nanjing", "Shanghai", "Shenyang", "Xiamen", "Xian"};
      char citycd[21][10] = {"PEK", "CTU", "CKG", "CSX", "CGQ", "DLC", "FOC", "KWE", "KWL", "HGH", "HAK", "HRB", "HFE", "TNA", "KMG", "LXA", "NKG", "SHA", "SHE", "XMN", "XIY"};
      char tmp1[2], tmp2[2], cityf[15], cityt[15];
      int num[6], i = 0, status1, status2;
      sscanf(sn, "%2d%2d%2d%2d%2d%2d%d", num[0], num[1], num[2], num[3], num[4], num[5], num[6]);
      do
        {
          tmp1[i] = (char) num[i];
          tmp2[i] = (char) num[i+3];
          i++;
        } while (i <= 2);
      i = 0;
      do
        {
          status1 = strcmp(tmp1, citycd[i]);
          i++;
        } while (status1 != 0);
      strcpy(cityf, city[i]);
      i = 0;
      do
        {
          status2 = strcmp(tmp1, citycd[i]);
          i++;
        } while (status2 != 0);
      strcpy(cityt, city[i]);
      P = Find(num[6], T);
      printf("From:%s\n", cityf);
      printf("To:%s\n", cityt);
    
    
    
      Here->       printf("Name:%s\n", P->Information->name);
      Here->       printf("Personal ID:%s\n", P->Information->id);
      Here->       printf("Nationality:%s\n", P->Information->nal);
    } 
    
    
    
    
    
    void
    getserial(const char cityfc[], const char citytc[], char sn[], int i)
    {
      int array1[2], array2[2], counter = 0;
      while (counter <= 2)
        {
          array1[counter] = (int) cityfc[counter];
          array2[counter] = (int) citytc[counter];
          counter++;	
        }
      sprintf(sn, "%d%d%d%d%d%d%d", array1[0], array1[1], array1[2], array2[0], array2[1], array2[2], i); 
    }
    
    void
    create(SearchTree T, int num)
    {
      Position P;
      char na[15], in[20], nn[15];
      printf("Please enter you name:");
      gets(na);
      printf("Please enter your personal ID number:");
      gets(in);
      printf("Please enter your nationality:");
      get(nn);
      Insert(num, T);
      P = Find(num, T);
      
    
      Here->        strcpy(P->Information->name, na);
      Here->        strcpy(P->Information->id, in);
      Here->        strcpy(P->Information->nal, nn);
    }
    
    int
    check(char cityi[], char tmp[])
    {
      int i = 0;
      char city[21][10] = {"Beijing", "Chengdu", "Chongqing", "Changsha", "Changchun", "Dalian", "Fuzhou", "Guiyang", "Guiling", "Hangzhou", "Haikou", "Harbin", "Hefei", "Jinan", "Kunmin", "Lasa", "Nanjing", "Shanghai", "Shenyang", "Xiamen", "Xian"};
      char citycd[21][10] = {"PEK", "CTU", "CKG", "CSX", "CGQ", "DLC", "FOC", "KWE", "KWL", "HGH", "HAK", "HRB", "HFE", "TNA", "KMG", "LXA", "NKG", "SHA", "SHE", "XMN", "XIY"};
      while (i < 21)
        {
          if (strcmp(cityi, city[i]) == 1)
    	{
    	  strcpy(tmp, citycd[i]);	
    	  return 1;
    	  break;
    	}
        }
      return 0;
    }
    
    int
    main(void)
    {
      SearchTree T1, T2;
      int sel, status = 0, i = 0, n = 0, num, innum, m = 1;
      char cityf[15], cityt[15], sn[15], cityfc[3], citytc[3], insn[15];
      do
        {
          printf("Welcome to the Ticket System!!\n");
          printf("1.Tickets sale\n");
          printf("2.Tickets check\n");
          printf("3.Exit\n");
          printf("Please chose the funtion you want:");
          scanf("%d", &sel);
          i++;
          if (sel == 1)
    	{
    	  do
    	    {
    	      printf("Please meet two or three segment toger eg. type Bei Jing as Beijing\n");
    	      printf("Please enter the city you want to set off:");
    	      gets(cityf);
    	      status = check(cityf, cityfc);
    	    } while (status != 1);
    	  do
    	    {
    	      printf("Please enter your destination:");
    	      gets(cityt);
    	      status = check(cityt, citytc);
    	    } while (status != 1);
    	  create(T1, i);
    	  getserial(cityfc, citytc, sn, i);
    	  sscanf(sn, "%d", &num);
    	  Insert(num, T2);
    	  printf("Your ticket serial number:%s\n", sn);
    	}
          if (sel == 2)
    	{
    	  printf("Please enter your ticket serial number:");
    	  scanf("%d", &innum);
    	  if (Find(innum, T2) == NULL)
    	    printf("Not Found!!");
    	  else
    	    {
    	      sprintf(insn, "%d", innum);
    	      getinfo(insn, T1);
    	    }
    	}
          if (sel == 3)
    	return(0);
        } while (m == 1);
      return(0);
    }

  12. #12
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    Sorry

    Excuse me, how can I merge them together??

  13. #13
    &TH of undefined behavior Fordy's Avatar
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    Re: Sorry

    Originally posted by NightWalker
    Excuse me, how can I merge them together??
    You cant...only another mod or I can do it.

    But in future, if you click Post Reply at the bottom of the last reply, all your posts will appear in the same thread.

  14. #14
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    Lightbulb A few questions

    Very sorry to trouble you, but I think this structure
    Code:
    struct TreeNode
    {
      ElementType Element;
      Info Information;
      SearchTree  Left;
      SearchTree  Right;
    };
    is available, because these tree.c and tree.h I just copied from my textbook. I changed my programme as you said, but the compiler gives the same information as before:
    dereferencing pointer to incomplete type, I really don't know why.
    I use gcc compiler. What's the differences between fgets() and gets()? Thanks

  15. #15
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    Question

    If move the structure declaration to the header file, how can I do that?
    Code:
    struct TreeNode
    {
      ElementType Element;
      Info Information;
      SearchTree  Left;
      SearchTree  Right;
    };
    Attached Files Attached Files
    • File Type: h tree.h (605 Bytes, 82 views)

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