Just an idea

[hbk]

I want to scan a number from a file and use it as means as a checkpoint to another file. The truth is i am writing data to a file based on id numbers and i want when the compiler is closed and reopened the data can continue be entered based on the last id number entered.

I am using two files to carry out such task, one file hold all the information and the other i want just to store the last id number entered by the user.

So when the user runs the program another time it shuld read data from the second file and use it as a chechpoint.

void addrecord(void)
{
     system("color 2"); 
     
     FILE *cust;   
         
     customer1 = fopen("customer1.txt","a+");
     cust=fopen("temp.txt","a+");
    
     int num=0,x;
     int base=0;
     
     int regis=1000;
     int regis2=1000;
          
     fscanf(cust,"%d",&info.regis2);
     
     regis=info.regis2;      
             
     
     printf("\n\n\t\t PLEASE ENTER THE AMOUNT OF CUSTOMER YOU WANT TO ADD:");
     scanf("%d",&num);
     
     printf("\n\n\t\t\t  PLEASE ENTER THE CUSTOMER INFORMATION BELOW");    
        
       
    for(x=1;x<=num;x++)
    {                        
                         
     printf("\n\n\t\t\t       ENTER PATIENTS NUMBER %d DETAILS",x);   
         
     printf("\n\n\t\t\t  NAME: ");
     fflush(stdin);
     gets(info.Name);     
     
     printf("\n\n\t\t\t  ADDRESS: ");
     gets(info.address);
     
     printf("\n\n\t\t\t  NUMBER: ");
     gets(info.number);
     
     printf("\n\n\t\t\t  TREATMENT: ");
     gets(info.treatment);
     
     printf("\n\n\t\t\t  ALLERGIES: ");
     gets(info.allergies); 
     
     printf("\n\n\t\t\t  DATE OF BIRTH 12/12/12: "); 
     gets(info.dob);     
        
     printf("\n\n\t\t\t  DATE OF LAST APPOINTMENT 12/12/12: ");
     gets(info.app);
     
         
     system("cls");
     
     system("color 2");
     
     if (customer1==NULL)
            printf("\n\n\t\t\t  FILE WAS NOT FOUND ");
     else
         {
                              
                                
            regis++;                         
            
            fprintf(customer1,"%d %s %s %s %s %s %s %s\n",regis,info.Name,info.address,info.number,info.dob,info.treatment,info.allergies,info.app);
            
                               
         }
         
         if(cust==NULL)
           printf("\n\n\t\t\t  FILE NOT FOUND");
       else
       {    
               regis2++;                          
                if (x==num)
                   fprintf(cust,"%d",regis2);
                   }      
       
        } 
       
       
       
       
       
     fclose(cust);              
     fclose(customer1);     
     
}

File 1
1001 .................................
1002.................................

File 2
1002

[dargueta]

Wait...so what's the question?

[hbk]

how do i achieve the task.

[dargueta]

Well, I'm assuming you know how to use fscanf, so you can just read the record number from there, and the open your file in append mode and the write pointer will go straight to the end.

FILE *last, *records;
last = fopen("last.txt","r+");
records = fopen("records.txt","a+");

int lastrecord;
fscanf(last,"%d",&lastrecord);

/* now you have the last record number,
and can write directly into the file to make
a new record */

fclose(last);
fclose(records);