writing in a specific position

[overlord21]

i'm trying to delete an account in my file but the problem is that i can reach my position depending on my index but i cann'ty write in this record

void account_delete(char *filename)
{
     
     
     
     int pos; 
     account temp;
     FILE *file=fopen(filename,"rb+");
     if(file!=NULL)
     {
                     
                          printf("enter the index to modify");
                          scanf("%d",&pos);          
                         
                     fseek(file, (pos -1 ) *sizeof(account), SEEK_SET );
                     fread(&temp, sizeof(account), 1,file);
                     printf("%s\n",temp.name);                    
                     strcpy(temp.name,"");strcpy(temp.password,"");strcpy(temp.previleges,"");
                     printf("%s\n",temp.name);
                     fwrite(&temp,sizeof(account),1,file); 
     }
                  
          viewall(filename);
          fclose(file);                                          
     }

please some suggestions if possible

[Salem]

Why do you read?
Just seek to the position, and write a record which means "deleted".

As it stands, your code needs another fseek().

Also, what does viewall do? Does it try to open the file as well before you've closed this one?

[overlord21]

even if i remove the read there is no change .also in other functions i nedd to read the record to modify and then write it back.
the viewall function display all the content off the file

[Salem]

OK, so viewall does open the file then.

Perhaps close the file here, THEN call viewall?

[overlord21]

sorry the delete operation works but those where i need to modify the record still doesn't write the modified code here is a function wich modify the password of an account record

[overlord21]

void change_password(char *filename)
{
     
     
     
    int pos; 
     char pwd[20];
    
     account temp;
     
     FILE *file=fopen(filename,"rb+");
     if(file!=NULL)
       {
                          printf("enter the index to modify");
                          scanf("%d",&pos);                     
                              
                         
                          fseek(file, (pos -1 ) *sizeof(account), SEEK_SET );
                          fread(&temp, sizeof(account), 1,file);
                          printf("enter the new password ");
                          scanf("%d",&pwd);                     
                          strcpy(temp.password,pwd);
                         fwrite(&temp,sizeof(account),1,file); 
     }
     
 
 fclose(file);
 viewall(filename);                     
     
       
       
        }

[Salem]

See post #2