File Manipulation

This is a discussion on File Manipulation within the C Programming forums, part of the General Programming Boards category; Hello there. The purpose of this program is to enter data about customers and create a word document based on ...

  1. #1
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    Join Date
    Nov 2009
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    2

    File Manipulation

    Hello there.

    The purpose of this program is to enter data about customers and create a word document based on this data.

    The problem rests in my file manipulation.

    I wish to be able to search, edit and delete. In order to do so I have read I require a binary file and have thus started utilizing them.

    However, upon trying to read my data, I repeatedly get errors. I have salvaged the code to a point where it no longer crashes etc for your viewing ease.

    Please do your best.

    Notes:

    I am not 100% it is WRITING properly.
    I am still in the process of learning C, please assist.


    Windows 7
    Latest Dev version.

    Please assist me, this has been frustrating me for almost 1 week. I don't usually like to bother people with things they will probably consider "basic" .

    Code:
    #include <stdio.h>
    #include <stdlib.h>
    #include <conio.h>
    #include <windows.h>
    #include <ctype.h>
    
    
    #define MaxRecords 10
    #define MaxProducts 10
    
    #define TRUE 1
    #define FALSE 0
    
    enum{EMPTY,TAKEN};
    
    
    void MainMenu();
    void InputCustData();
    void InputItemData();
    void IntroductoryOutput();
    void FlashOutput();
    float CalcTotPrice(int,float);
    void ConfirmItemNum(int);
    void DisplayCustDataMEM();
    void DisplayAllRecords();
    
    
    int c=1;
    int *item_num_ptr;
    FILE *fp= NULL;                                 /* File pointer                           */
    char *filename = "records.txt";
    
    
    FILE *CDPtr;
    
    struct CustomerItems
    {
           char ProdID[20][MaxProducts];
           char Desc[50][MaxProducts];
           int Qty[MaxProducts];
           float Price[MaxProducts];
           float TotPrice[MaxProducts];
           
    };
    
    struct CustomerItems I_array[MaxRecords]={EMPTY};
    
    
    
    
    struct CustomerData
      {
             /*Members of the structure*/
             char fName[30];
             char lName[30];  
             char SalrepName[45];   
             char ShipDate[20];
             char DueDate[20];
             struct CustomerItems CustItems;               
            
      };
      
    struct CustomerData C_array[MaxRecords]={EMPTY};
    
    
    
    main()
    {
          CreateDatabase();
          IntroductoryOutput();
          MainMenu();
    }
    
    
    void IntroductoryOutput()
    {
          FlashOutput();              
          printf("\n\nThe functions of this program are as follows:\n\n\n ");
    	  printf("\t ______________________________________________________\n"); 
          printf("\t|- Creating invoices.                                  |\n"); 
          printf("\t|- Displaying the total Customer records present.      |\n"); 
          printf("\t|- Retrieving particular invoice files.                |\n"); 
          printf("\t|- Alter customer records.                             |\n");
    	  printf("\t|- Searching for a particular record.                  |\n");
          printf("\t|______________________________________________________|\n");
          getch();
    }
    
    void FlashOutput()
    {
          printf("+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+\n\n");
          printf("   0000  PPPP  EEEE   RR RRR         A      TTTTTT   IIIIII   0000  NNN   NN\n");
          sleep(200);
          printf("   0  0  P  P  EE     RR RRR        A A       TT       II     0  0  NNNN  NN\n");
          sleep(200);
          printf("   0  0  PPPP  EEEE   RRRRRR       AAAAA      TT       II     0  0  NN NN NN\n");
          sleep(200);
          printf("   0  0  PP    EE     RRR  RR     A     A     TT       II     0  0  NN  NNNN\n");
          sleep(200);
          printf("   0000  PP    EEEE   RRR  RRR   A       A    TT     IIIIII   0000  NN  NNNN\n\n");
          printf("+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+\n");  
          
    }            
                  
    void MainMenu()
    {
        char achoice; 
        do
        {
          system("cls");   
          printf("+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+\n\n");
          printf("      MM    MM   AAA   IIIII NN   NN       MM    MM EEEEEEE NN   NN UU   UU\n");
          sleep(200); 
          printf("      MMM  MMM  AAAAA   III  NNN  NN       MMM  MMM EE      NNN  NN UU   UU\n");
          sleep(200); 
          printf("      MM MM MM AA   AA  III  NN N NN       MM MM MM EEEEE   NN N NN UU   UU\n");
          sleep(200); 
          printf("      MM    MM AAAAAAA  III  NN  NNN       MM    MM EE      NN  NNN UU   UU\n");
          sleep(200); 
          printf("      MM    MM AA   AA IIIII NN   NN       MM    MM EEEEEEE NN   NN  UUUUU \n\n");
          sleep(200);
          printf("+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+!+\n");   
             
          
          printf("\n\n");    
          printf("\t ____________________________________________________________________\n");
          printf("\t|                                                                    |\n"); 
          printf("\t| - Enter '1' in order to enter customer data.                       |\n"); 
          printf("\t| - Enter '2' to display Customer Datasheet.                         |\n"); 
          printf("\t| - Enter '3' to retrieve the invoice file of a particular customer. |\n"); 
          printf("\t| - Enter '4' to delete a customer record.                           |\n");
    	  printf("\t| - Enter '5' to terminate the program.                              |\n");
          printf("\t|____________________________________________________________________|\n");         
          scanf("%c", &achoice);
    	  fflush(stdin);
    	  
    	
    	  switch(achoice)
    	  {
              case '1':system("cls");
                       WriteCustData();
              break;
    	      case '2':system("cls"); 
                        DisplayAllRecords();
              break;
    	      case '3':system("cls"); 
                       //find_numbers();;
              break;
    	      case '4':system("cls");
                       //delete_records();
              break;
    	      case '5': exit(0);
    	      break;
    	      default: printf("\n\nWrong choice entered.\n"); 
                       printf("Press any key to continue,please enter a number between 1 and 5!\n\n");
              break;        
          }
    	getch();
         
          
         
          
        }while(achoice != 5);
    
    }
    
    
    void InputCustData()
    {
                                               
                   
                   printf("\n\n");
                   printf("----------------------------------------------------\n");
                   printf("Please enter the following data for the customer:  \n");
                   printf("----------------------------------------------------\n\n");
                   printf("\n\nPlease enter the customer's first name:  ");
                   scanf("%s",C_array[c].fName);
                   fflush(stdin);
                   printf("\n\nPlease enter the customer's last name:  ");
                   scanf("%s",C_array[c].lName);
                   fflush(stdin);
                   printf("\n\nPlease enter the Sales Representative of customer:  "); 
                   fgets(C_array[c].SalrepName,30,stdin);
                   fflush(stdin);
                   printf("\n\nPlease enter the date the item was shipped/distributed:  ");
                   scanf("%s",C_array[c].ShipDate);
                   fflush(stdin);
                   printf("\n\nPlease enter the date the item is due for arrival:  ");
                   scanf("%s",C_array[c].DueDate);
                   fflush(stdin);       
                                
                   
                   printf("\n\nPress any key in order to proceed to entering the item data.\n");
                   getch();
                   
                   InputItemData();
    }          
    
    
    
    void InputItemData()
    {
         int itemnum;
         
         system("cls");
         printf("Please enter the number of items the customer has purchased:\n");
         scanf("%d",&itemnum);
         fflush(stdin);
         
         while(itemnum > MaxProducts)
         {
                    printf("\nThe maximum number of products allowed is: %d",MaxProducts);
                    printf("\nPlease enter a number less than %d.\n\n",MaxProducts);
                    scanf("%d",&itemnum);
         }
         
         item_num_ptr=&itemnum;
         ConfirmItemNum(itemnum);
         
         
         
         int i;
         
         for(i=1;i <=itemnum;i++)
         {
                   system("cls");
                   printf("\t\t\t\t Item %d\n\n",i);
                   printf("\n\nPlease enter the Product ID of the item:\n\n");
                   scanf("%s",I_array[c].ProdID[i]);
                   fflush(stdin);
                   printf("\n\nPlease enter the description of the item:\n\n");
                   fgets(I_array[c].Desc[i],100,stdin);
                   fflush(stdin);
                   printf("\n\nPlease enter the quantity of the item:\n\n");
                   scanf("%d",&I_array[c].Qty[i]);                               
                   fflush(stdin);
                   printf("\n\nPlease enter the unit price of the item:\n\n");
                   scanf("%f",&I_array[c].Price[i]);                               
                   fflush(stdin);               
         
                   I_array[c].TotPrice[i]=CalcTotPrice(I_array[c].Qty[i],I_array[c].Price[i]);
                   printf("\n\nThe total price of %s is: %f",I_array[c].ProdID[i],I_array[c].TotPrice[i]);
                   sleep(1500);   
         } 
         
         
         ConfirmCustData();
    }             
    
    void ConfirmItemNum(int itemnum)
    {
         char confirmI;
         
         printf("\n\nBegin entry process for %d products for customer %s %s  ?\n\n",itemnum,C_array[c].fName,C_array[c].lName);
         printf("Enter:\n");
         printf("Y = 'Yes'\nN = 'No'\n");
         printf("\n\nNote: Entering 'N' will result in the user being allowed re-entry of the data.\n");
         scanf("%c",&confirmI);
         
         
         
         switch(confirmI)
         {
                         case 'Y': 
                         break; 
                         case 'N': system("cls");
                                   ReEntry();
                                   system("cls");                    
                                   InputItemData();
                         break;
                         default: system("cls");
                                  printf("\nYou have entered neither Y nor N.");
                                  printf("\nPlease enter Y or N in order to progress.");
                                  ConfirmItemNum(itemnum);
         }                         
    }
     
    float CalcTotPrice(int IQty,float IPrice) 
    {
               float Totprice;
               
               Totprice= IQty * IPrice;
               return Totprice;
               
    }  
    
    ConfirmCustData()
    {    
                        
        printf("The data you have entered will be displayed below:\n\n\n:");
        DisplayCustDataMEM();
        
        char confirmall;
        
        printf("Is this the data you wish to be stored?\n\n");
        printf("Enter:\n");
        printf("Y = 'Yes'\nN = 'No'\n");
        printf("\n\nNote: Entering 'N' will result in the user being allowed re-entry of the data.\n");
        printf("\n\nNote: Entering 'N' will result in all data being entered once again.\n\n");
        scanf("%c",&confirmall); 
        
        
        switch(confirmall)
         {
                         case 'Y': WriteCustFile();
                         break; 
                         case 'N': system("cls");
                                   ReEntry();
                                   system("cls");                    
                                   
                                   
                         break;
                         default: system("cls");
                                  printf("\nYou have entered neither Y nor N.");
                                  printf("\nPlease enter Y or N in order to progress.");
                                  ConfirmCustData();
         }                         
    } 
    
    
                                 
    
    void DisplayCustDataMEM()
    {
          system("cls");
          printf("______________________________________________________________________________\n\n");         
          printf("\t\t\t     CUSTOMER INFORMATION\n\n");
          printf("______________________________________________________________________________\n");               
          printf("Customer First Name :%s\n\n",C_array[c].fName);
          printf("Customer Last Name: %s\n\n",C_array[c].lName);
          printf("Sale Representative: %s\n\n",C_array[c].SalrepName);
          printf("Ship Date: %s\n\n",C_array[c].ShipDate);
          printf("Arrival Date(Estimated)%s:\n\n",C_array[c].DueDate);
          printf("______________________________________________________________________________\n\n");
          
          
          int itemnum;
          itemnum=*item_num_ptr;
          
          int i;
          
          printf("\t\t\t       ITEMS PURCHASED\n\n");
          printf("______________________________________________________________________________\n");
          for(i=1;i <=itemnum;i++)
          {           
                   printf("\t\t\t\t   Item %d\n\n",i);
                   printf("Product ID :%s \n\n",I_array[c].ProdID[i]);
                   printf("Description :%s \n\n",I_array[c].Desc[i]);               
                   printf("Quantity :%d \n\n",I_array[c].Qty[i]);
                   printf("Unit Price :%f \n\n",I_array[c].Price[i]);
                   printf("Total Price(Quantity X Unit Price) :%f \n\n",I_array[c].TotPrice[i]);
                   printf("------------------------------------------------------------------------------\n");
          }
    }
                     
    
                    
         
    CreateDatabase()
    {
        int i;
        
        struct CustomerData blankCust={EMPTY};
        
        
        
        if((CDPtr=fopen("CustomerDatabase.doc","wb"))==NULL)
        {
           printf("The file could not be opened.\n");
           abort();
        }
        else
        {
           for(i=1;i<=MaxRecords;i++)
           {
              fwrite(&blankCust,sizeof(struct CustomerData),1,CDPtr);
           }
           
           fclose(CDPtr);
           
        } 
        fclose(CDPtr);
        
        return 0;
        
    } 
    
    
                
                   
                                                           
    ReEntry()
    {
           system("cls");
           
           printf("\n\n\n\n\n");      
             
           printf(" RRRRRR    EEEE                EEEE   NNN   NN   TTTTTT   RRRRRR   Y    Y   \n");
           printf(" RR  RR    EE     -----------  EE     NNNN  NN     TT     RR  RR    Y  Y      \n");
           printf(" RRRRRR    EEEE   -----------  EEEE   NN NN NN     TT     RRRRRR     YY       \n");
           printf(" RRR  RR   EE     -----------  EE     NN  NNNN     TT     RRR  RR    YY     \n");
           printf(" RRR  RRR  EEEE                EEEE   NN  NNNN     TT     RRR  RRR   YY     \n\n");
           sleep(1200);
    }
    
    WriteCustData()
    {
         struct CustomerData Cust={EMPTY};
         
         if((CDPtr=fopen("CustomerDatabase.doc","ab"))==NULL)
         {
            printf("The file could not be opened.\n");
            abort();
         }  
         else
         {
             InputCustData();
             
         } 
         
         fclose(CDPtr); 
         
         return 0;
    }   
    
    WriteCustFile()
       {
            int CheckCustFile;
            CDPtr = fopen("CustomerDatabase.doc", "wb+");
            if(CDPtr == NULL)
            {
               
               fprintf(stderr, "Error opening file. Returning to EngineerMenu\n");
               return;
            }
    
            CheckCustFile = fwrite(C_array, sizeof(struct CustomerData), MaxRecords, CDPtr);
            if(CheckCustFile != MaxRecords)
            {
               
               fprintf(stderr, "Error reading file. Returning to EngineerMenu\n");
               return;
            }
            fclose(CDPtr);
    }
    
    
    void DisplayAllRecords()
       {
            int CheckCustFile;
            CDPtr = fopen("CustomerDatabase.doc", "rb");
            if(CDPtr == NULL)
            {
               
               fprintf(stderr, "Error opening file.\n");
               return;
            }
    
            
            if(CheckCustFile != MaxRecords)
            {
               
               fprintf(stderr, "Error reading file. \n");
               return;
            }
            for(;;)
            {
                   fread(&C_array, sizeof(struct CustomerData), 1, CDPtr);
                   
                   if(feof(CDPtr))
                   {
                       break;
                   }
                                  
                   DisplayCustDataMEM();
            }       
            fclose(CDPtr);
    }

    Edit: Code isn't as clear as I'd like, is there any way to make it clearer for you guys? Please inform me.

    I don't mean for it to be...hard to read.

    Edit: Added C file.
    Attached Files Attached Files
    Last edited by Pr0AHP; 04-11-2010 at 08:52 PM.

  2. #2
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    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
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